diff -Nru glibc-2.31/debian/changelog glibc-2.31/debian/changelog --- glibc-2.31/debian/changelog 2023-07-26 07:44:39.000000000 +0000 +++ glibc-2.31/debian/changelog 2023-11-22 13:32:50.000000000 +0000 @@ -1,3 +1,18 @@ +glibc (2.31-0ubuntu9.14) focal-security; urgency=medium + + * SECURITY UPDATE: use-after-free through getcanonname_r plugin call + - debian/patches/any/CVE-2023-4806.patch: copy h_name over and free it at + the end (getaddrinfo). + - CVE-2023-4806 + * SECURITY UPDATE: use-after-free in gaih_inet function + - debian/patches/any/CVE-2023-4813.patch: simplify allocations and fix + merge and continue actions. + - CVE-2023-4813 + * debian/testsuite-xfail-debian.mk: add tst-nss-gai-actions and + tst-nss-gai-hv2-canonname to xfails (container tests). + + -- Camila Camargo de Matos Wed, 22 Nov 2023 10:32:50 -0300 + glibc (2.31-0ubuntu9.12) focal; urgency=medium * Drop SVE memcpy implementation due to kernel-related performance diff -Nru glibc-2.31/debian/patches/any/CVE-2023-4806.patch glibc-2.31/debian/patches/any/CVE-2023-4806.patch --- glibc-2.31/debian/patches/any/CVE-2023-4806.patch 1970-01-01 00:00:00.000000000 +0000 +++ glibc-2.31/debian/patches/any/CVE-2023-4806.patch 2023-11-22 13:32:50.000000000 +0000 @@ -0,0 +1,328 @@ +Origin: backport, https://sourceware.org/git/?p=glibc.git;a=commit;h=973fe93a5675c42798b2161c6f29c01b0e243994 +Origin: backport, patch glibc-RHEL-2422.patch available in the glibc-2.28-225.el8_8.6.src.rpm package (RHEL) + +From 973fe93a5675c42798b2161c6f29c01b0e243994 Mon Sep 17 00:00:00 2001 +From: Siddhesh Poyarekar +Date: Fri, 15 Sep 2023 13:51:12 -0400 +Subject: [PATCH] getaddrinfo: Fix use after free in getcanonname + (CVE-2023-4806) + +When an NSS plugin only implements the _gethostbyname2_r and +_getcanonname_r callbacks, getaddrinfo could use memory that was freed +during tmpbuf resizing, through h_name in a previous query response. + +The backing store for res->at->name when doing a query with +gethostbyname3_r or gethostbyname2_r is tmpbuf, which is reallocated in +gethosts during the query. For AF_INET6 lookup with AI_ALL | +AI_V4MAPPED, gethosts gets called twice, once for a v6 lookup and second +for a v4 lookup. In this case, if the first call reallocates tmpbuf +enough number of times, resulting in a malloc, th->h_name (that +res->at->name refers to) ends up on a heap allocated storage in tmpbuf. +Now if the second call to gethosts also causes the plugin callback to +return NSS_STATUS_TRYAGAIN, tmpbuf will get freed, resulting in a UAF +reference in res->at->name. This then gets dereferenced in the +getcanonname_r plugin call, resulting in the use after free. + +Fix this by copying h_name over and freeing it at the end. This +resolves BZ #30843, which is assigned CVE-2023-4806. + +Signed-off-by: Siddhesh Poyarekar +--- + nss/Makefile | 15 ++++- + nss/nss_test_gai_hv2_canonname.c | 56 +++++++++++++++++ + nss/tst-nss-gai-hv2-canonname.c | 63 +++++++++++++++++++ + nss/tst-nss-gai-hv2-canonname.h | 1 + + .../postclean.req | 0 + .../tst-nss-gai-hv2-canonname.script | 2 + + sysdeps/posix/getaddrinfo.c | 25 +++++--- + 7 files changed, 152 insertions(+), 10 deletions(-) + create mode 100644 nss/nss_test_gai_hv2_canonname.c + create mode 100644 nss/tst-nss-gai-hv2-canonname.c + create mode 100644 nss/tst-nss-gai-hv2-canonname.h + create mode 100644 nss/tst-nss-gai-hv2-canonname.root/postclean.req + create mode 100644 nss/tst-nss-gai-hv2-canonname.root/tst-nss-gai-hv2-canonname.script + +Index: glibc-2.31/nss/Makefile +=================================================================== +--- glibc-2.31.orig/nss/Makefile ++++ glibc-2.31/nss/Makefile +@@ -64,7 +64,8 @@ tests-container = \ + tst-nss-files-hosts-long \ + tst-nss-db-endpwent \ + tst-nss-db-endgrent \ +- tst-nss-gai-actions ++ tst-nss-gai-actions \ ++ tst-nss-gai-hv2-canonname + + # Tests which need libdl + ifeq (yes,$(build-shared)) +@@ -119,7 +120,7 @@ routines += $(libnss_file + static-only-routines += $(libnss_files-routines) + tests-static += tst-nss-static + endif +-extra-test-objs += nss_test1.os nss_test2.os ++extra-test-objs += nss_test1.os nss_test2.os nss_test_gai_hv2_canonname.os + + include ../Rules + +@@ -155,10 +156,15 @@ rtld-tests-LDFLAGS += -Wl,--dynamic-list + + libof-nss_test1 = extramodules + libof-nss_test2 = extramodules ++libof-nss_test_gai_hv2_canonname = extramodules + $(objpfx)/libnss_test1.so: $(objpfx)nss_test1.os $(link-libc-deps) + $(build-module) + $(objpfx)/libnss_test2.so: $(objpfx)nss_test2.os $(link-libc-deps) + $(build-module) ++$(objpfx)/libnss_test_gai_hv2_canonname.so: \ ++ $(objpfx)nss_test_gai_hv2_canonname.os $(link-libc-deps) \ ++ $(objpfx)/libnss_files.so ++ $(build-module) + $(objpfx)nss_test2.os : nss_test1.c + ifdef libnss_test1.so-version + $(objpfx)/libnss_test1.so$(libnss_test1.so-version): $(objpfx)/libnss_test1.so +@@ -168,9 +173,13 @@ ifdef libnss_test2.so-version + $(objpfx)/libnss_test2.so$(libnss_test2.so-version): $(objpfx)/libnss_test2.so + $(make-link) + endif ++$(objpfx)/libnss_test_gai_hv2_canonname.so$(libnss_files.so-version): \ ++ $(objpfx)/libnss_test_gai_hv2_canonname.so ++ $(make-link) + $(patsubst %,$(objpfx)%.out,$(tests) $(tests-container)) : \ + $(objpfx)/libnss_test1.so$(libnss_test1.so-version) \ +- $(objpfx)/libnss_test2.so$(libnss_test2.so-version) ++ $(objpfx)/libnss_test2.so$(libnss_test2.so-version) \ ++ $(objpfx)/libnss_test_gai_hv2_canonname.so$(libnss_files.so-version) + + ifeq (yes,$(have-thread-library)) + $(objpfx)tst-cancel-getpwuid_r: $(shared-thread-library) +@@ -183,3 +192,4 @@ $(objpfx)tst-nss-files-alias-leak: $(lib + $(objpfx)tst-nss-files-alias-leak.out: $(objpfx)/libnss_files.so + $(objpfx)tst-nss-files-alias-truncated: $(libdl) + $(objpfx)tst-nss-files-alias-truncated.out: $(objpfx)/libnss_files.so ++LDFLAGS-tst-nss-test_gai_hv2_canonname = -Wl,--disable-new-dtags +Index: glibc-2.31/nss/nss_test_gai_hv2_canonname.c +=================================================================== +--- /dev/null ++++ glibc-2.31/nss/nss_test_gai_hv2_canonname.c +@@ -0,0 +1,64 @@ ++/* NSS service provider that only provides gethostbyname2_r. ++ Copyright The GNU Toolchain Authors. ++ This file is part of the GNU C Library. ++ ++ The GNU C Library is free software; you can redistribute it and/or ++ modify it under the terms of the GNU Lesser General Public ++ License as published by the Free Software Foundation; either ++ version 2.1 of the License, or (at your option) any later version. ++ ++ The GNU C Library is distributed in the hope that it will be useful, ++ but WITHOUT ANY WARRANTY; without even the implied warranty of ++ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ++ Lesser General Public License for more details. ++ ++ You should have received a copy of the GNU Lesser General Public ++ License along with the GNU C Library; if not, see ++ . */ ++ ++#include ++#include ++#include ++#include ++#include "nss/tst-nss-gai-hv2-canonname.h" ++ ++/* Catch misnamed and functions. */ ++#pragma GCC diagnostic error "-Wmissing-prototypes" ++ ++extern enum nss_status _nss_files_gethostbyname2_r (const char *, int, ++ struct hostent *, char *, ++ size_t, int *, int *); ++ ++enum nss_status ++_nss_test_gai_hv2_canonname_gethostbyname2_r (const char *, int, struct hostent ++ *, char *, size_t, int *, int *); ++ ++enum nss_status ++_nss_test_gai_hv2_canonname_getcanonname_r (const char *, char *, size_t, char ++ **, int *, int *); ++ ++enum nss_status ++_nss_test_gai_hv2_canonname_gethostbyname2_r (const char *name, int af, ++ struct hostent *result, ++ char *buffer, size_t buflen, ++ int *errnop, int *herrnop) ++{ ++ return _nss_files_gethostbyname2_r (name, af, result, buffer, buflen, errnop, ++ herrnop); ++} ++ ++enum nss_status ++_nss_test_gai_hv2_canonname_getcanonname_r (const char *name, char *buffer, ++ size_t buflen, char **result, ++ int *errnop, int *h_errnop) ++{ ++ /* We expect QUERYNAME, which is a small enough string that it shouldn't fail ++ the test. */ ++ if (memcmp (QUERYNAME, name, sizeof (QUERYNAME)) ++ || buflen < sizeof (QUERYNAME)) ++ abort (); ++ ++ strncpy (buffer, name, buflen); ++ *result = buffer; ++ return NSS_STATUS_SUCCESS; ++} +Index: glibc-2.31/nss/tst-nss-gai-hv2-canonname.c +=================================================================== +--- /dev/null ++++ glibc-2.31/nss/tst-nss-gai-hv2-canonname.c +@@ -0,0 +1,63 @@ ++/* Test NSS query path for plugins that only implement gethostbyname2 ++ (#30843). ++ Copyright The GNU Toolchain Authors. ++ This file is part of the GNU C Library. ++ ++ The GNU C Library is free software; you can redistribute it and/or ++ modify it under the terms of the GNU Lesser General Public ++ License as published by the Free Software Foundation; either ++ version 2.1 of the License, or (at your option) any later version. ++ ++ The GNU C Library is distributed in the hope that it will be useful, ++ but WITHOUT ANY WARRANTY; without even the implied warranty of ++ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ++ Lesser General Public License for more details. ++ ++ You should have received a copy of the GNU Lesser General Public ++ License along with the GNU C Library; if not, see ++ . */ ++ ++#include ++#include ++#include ++#include ++#include ++#include ++#include "nss/tst-nss-gai-hv2-canonname.h" ++ ++#define PREPARE do_prepare ++ ++static void do_prepare (int a, char **av) ++{ ++ FILE *hosts = xfopen ("/etc/hosts", "w"); ++ for (unsigned i = 2; i < 255; i++) ++ { ++ fprintf (hosts, "ff01::ff02:ff03:%u:2\ttest.example.com\n", i); ++ fprintf (hosts, "192.168.0.%u\ttest.example.com\n", i); ++ } ++ xfclose (hosts); ++} ++ ++static int ++do_test (void) ++{ ++ __nss_configure_lookup ("hosts", "test_gai_hv2_canonname"); ++ ++ struct addrinfo hints = {}; ++ struct addrinfo *result = NULL; ++ ++ hints.ai_family = AF_INET6; ++ hints.ai_flags = AI_ALL | AI_V4MAPPED | AI_CANONNAME; ++ ++ int ret = getaddrinfo (QUERYNAME, NULL, &hints, &result); ++ ++ if (ret != 0) ++ FAIL_EXIT1 ("getaddrinfo failed: %s\n", gai_strerror (ret)); ++ ++ TEST_COMPARE_STRING (result->ai_canonname, QUERYNAME); ++ ++ freeaddrinfo(result); ++ return 0; ++} ++ ++#include +Index: glibc-2.31/nss/tst-nss-gai-hv2-canonname.h +=================================================================== +--- /dev/null ++++ glibc-2.31/nss/tst-nss-gai-hv2-canonname.h +@@ -0,0 +1 @@ ++#define QUERYNAME "test.example.com" +Index: glibc-2.31/nss/tst-nss-gai-hv2-canonname.root/tst-nss-gai-hv2-canonname.script +=================================================================== +--- /dev/null ++++ glibc-2.31/nss/tst-nss-gai-hv2-canonname.root/tst-nss-gai-hv2-canonname.script +@@ -0,0 +1,2 @@ ++cp $B/nss/libnss_test_gai_hv2_canonname.so $L/libnss_test_gai_hv2_canonname.so.2 ++su +Index: glibc-2.31/sysdeps/posix/getaddrinfo.c +=================================================================== +--- glibc-2.31.orig/sysdeps/posix/getaddrinfo.c ++++ glibc-2.31/sysdeps/posix/getaddrinfo.c +@@ -232,7 +232,6 @@ convert_hostent_to_gaih_addrtuple (const + } + array[i].next = array + i + 1; + } +- array[0].name = h->h_name; + array[count - 1].next = NULL; + + *result = array; +@@ -283,6 +282,18 @@ convert_hostent_to_gaih_addrtuple (const + } \ + *pat = addrmem; \ + \ ++ /* Store h_name so that it survives accidental deallocation when \ ++ gethosts is called again and tmpbuf gets reallocated. */ \ ++ if (h_name == NULL && th.h_name != NULL) \ ++ { \ ++ h_name = __strdup (th.h_name); \ ++ if (h_name == NULL) \ ++ { \ ++ __resolv_context_put (res_ctx); \ ++ result = -EAI_SYSTEM; \ ++ goto free_and_return; \ ++ } \ ++ } \ + if (localcanon != NULL && canon == NULL) \ + { \ + canonbuf = __strdup (localcanon); \ +@@ -319,15 +330,15 @@ typedef enum nss_status (*nss_getcanonna + memory allocation failure. The returned string is allocated on the + heap; the caller has to free it. */ + static char * +-getcanonname (service_user *nip, struct gaih_addrtuple *at, const char *name) ++getcanonname (service_user *nip, const char *hname, const char *name) + { + nss_getcanonname_r cfct = __nss_lookup_function (nip, "getcanonname_r"); + char *s = (char *) name; + if (cfct != NULL) + { + char buf[256]; +- if (DL_CALL_FCT (cfct, (at->name ?: name, buf, sizeof (buf), +- &s, &errno, &h_errno)) != NSS_STATUS_SUCCESS) ++ if (DL_CALL_FCT (cfct, (hname ?: name, buf, sizeof (buf), &s, &errno, ++ &h_errno)) != NSS_STATUS_SUCCESS) + /* If the canonical name cannot be determined, use the passed + string. */ + s = (char *) name; +@@ -345,6 +356,7 @@ gaih_inet (const char *name, const struc + struct gaih_addrtuple *at = NULL; + bool got_ipv6 = false; + const char *canon = NULL; ++ char *h_name = NULL; + const char *orig_name = name; + + /* Reserve stack memory for the scratch buffer in the getaddrinfo +@@ -911,7 +923,7 @@ gaih_inet (const char *name, const struc + if ((req->ai_flags & AI_CANONNAME) != 0 + && canon == NULL) + { +- canonbuf = getcanonname (nip, at, name); ++ canonbuf = getcanonname (nip, h_name, name); + if (canonbuf == NULL) + { + __resolv_context_put (res_ctx); +@@ -1158,6 +1170,7 @@ gaih_inet (const char *name, const struc + free ((char *) name); + free (addrmem); + free (canonbuf); ++ free (h_name); + + return result; + } diff -Nru glibc-2.31/debian/patches/any/CVE-2023-4813.patch glibc-2.31/debian/patches/any/CVE-2023-4813.patch --- glibc-2.31/debian/patches/any/CVE-2023-4813.patch 1970-01-01 00:00:00.000000000 +0000 +++ glibc-2.31/debian/patches/any/CVE-2023-4813.patch 2023-11-22 13:32:50.000000000 +0000 @@ -0,0 +1,983 @@ +Origin: backport, https://sourceware.org/git/?p=glibc.git;a=commit;h=6e867146ee01de3ed1e94e777372093812a578e9 + +From 6e867146ee01de3ed1e94e777372093812a578e9 Mon Sep 17 00:00:00 2001 +From: Siddhesh Poyarekar +Date: Thu, 17 Mar 2022 11:44:34 +0530 +Subject: [PATCH] Simplify allocations and fix merge and continue actions [BZ + #28931] + +Allocations for address tuples is currently a bit confusing because of +the pointer chasing through PAT, making it hard to observe the sequence +in which allocations have been made. Narrow scope of the pointer +chasing through PAT so that it is only used where necessary. + +This also tightens actions behaviour with the hosts database in +getaddrinfo to comply with the manual text. The "continue" action +discards previous results and the "merge" action results in an immedate +lookup failure. Consequently, chaining of allocations across modules is +no longer necessary, thus opening up cleanup opportunities. + +A test has been added that checks some combinations to ensure that they +work correctly. + +Resolves: BZ #28931 + +Signed-off-by: Siddhesh Poyarekar +Reviewed-by: DJ Delorie +(cherry picked from commit 1c37b8022e8763fedbb3f79c02e05c6acfe5a215) +--- + nss/Makefile | 3 +- + nss/tst-nss-gai-actions.c | 149 ++++++ + nss/tst-nss-gai-actions.root/etc/host.conf | 1 + + nss/tst-nss-gai-actions.root/etc/hosts | 508 +++++++++++++++++++++ + sysdeps/posix/getaddrinfo.c | 143 +++--- + 5 files changed, 751 insertions(+), 53 deletions(-) + create mode 100644 nss/tst-nss-gai-actions.c + create mode 100644 nss/tst-nss-gai-actions.root/etc/host.conf + create mode 100644 nss/tst-nss-gai-actions.root/etc/hosts + +Index: glibc-2.31/nss/Makefile +=================================================================== +--- glibc-2.31.orig/nss/Makefile ++++ glibc-2.31/nss/Makefile +@@ -63,7 +63,8 @@ tests-container = \ + tst-nss-test3 \ + tst-nss-files-hosts-long \ + tst-nss-db-endpwent \ +- tst-nss-db-endgrent ++ tst-nss-db-endgrent \ ++ tst-nss-gai-actions + + # Tests which need libdl + ifeq (yes,$(build-shared)) +Index: glibc-2.31/nss/tst-nss-gai-actions.c +=================================================================== +--- /dev/null ++++ glibc-2.31/nss/tst-nss-gai-actions.c +@@ -0,0 +1,150 @@ ++/* Test continue and merge NSS actions for getaddrinfo. ++ Copyright The GNU Toolchain Authors. ++ This file is part of the GNU C Library. ++ ++ The GNU C Library is free software; you can redistribute it and/or ++ modify it under the terms of the GNU Lesser General Public ++ License as published by the Free Software Foundation; either ++ version 2.1 of the License, or (at your option) any later version. ++ ++ The GNU C Library is distributed in the hope that it will be useful, ++ but WITHOUT ANY WARRANTY; without even the implied warranty of ++ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ++ Lesser General Public License for more details. ++ ++ You should have received a copy of the GNU Lesser General Public ++ License along with the GNU C Library; if not, see ++ . */ ++ ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++ ++#include ++#include ++#include ++#include ++#include ++ ++enum ++{ ++ ACTION_MERGE = 0, ++ ACTION_CONTINUE, ++}; ++ ++static const char * ++family_str (int family) ++{ ++ switch (family) ++ { ++ case AF_UNSPEC: ++ return "AF_UNSPEC"; ++ case AF_INET: ++ return "AF_INET"; ++ default: ++ __builtin_unreachable (); ++ } ++} ++ ++static const char * ++action_str (int action) ++{ ++ switch (action) ++ { ++ case ACTION_MERGE: ++ return "merge"; ++ case ACTION_CONTINUE: ++ return "continue"; ++ default: ++ __builtin_unreachable (); ++ } ++} ++ ++static void ++do_one_test (int action, int family, bool canon) ++{ ++ struct addrinfo hints = ++ { ++ .ai_family = family, ++ }; ++ ++ struct addrinfo *ai; ++ ++ if (canon) ++ hints.ai_flags = AI_CANONNAME; ++ ++ printf ("***** Testing \"files [SUCCESS=%s] files\" for family %s, %s\n", ++ action_str (action), family_str (family), ++ canon ? "AI_CANONNAME" : ""); ++ ++ int ret = getaddrinfo ("example.org", "80", &hints, &ai); ++ ++ switch (action) ++ { ++ case ACTION_MERGE: ++ if (ret == 0) ++ { ++ char *formatted = support_format_addrinfo (ai, ret); ++ ++ printf ("merge unexpectedly succeeded:\n %s\n", formatted); ++ support_record_failure (); ++ free (formatted); ++ } ++ else ++ return; ++ case ACTION_CONTINUE: ++ { ++ char *formatted = support_format_addrinfo (ai, ret); ++ ++ /* Verify that the result appears exactly once. */ ++ const char *expected = "address: STREAM/TCP 192.0.0.1 80\n" ++ "address: DGRAM/UDP 192.0.0.1 80\n" ++ "address: RAW/IP 192.0.0.1 80\n"; ++ ++ const char *contains = strstr (formatted, expected); ++ const char *contains2 = NULL; ++ ++ if (contains != NULL) ++ contains2 = strstr (contains + strlen (expected), expected); ++ ++ if (contains == NULL || contains2 != NULL) ++ { ++ printf ("continue failed:\n%s\n", formatted); ++ support_record_failure (); ++ } ++ ++ free (formatted); ++ break; ++ } ++ default: ++ __builtin_unreachable (); ++ } ++} ++ ++static void ++do_one_test_set (int action) ++{ ++ char buf[32]; ++ ++ snprintf (buf, sizeof (buf), "files [SUCCESS=%s] files", ++ action_str (action)); ++ __nss_configure_lookup ("hosts", buf); ++ ++ do_one_test (action, AF_UNSPEC, false); ++ do_one_test (action, AF_INET, false); ++ do_one_test (action, AF_INET, true); ++} ++ ++static int ++do_test (void) ++{ ++ do_one_test_set (ACTION_CONTINUE); ++ do_one_test_set (ACTION_MERGE); ++ return 0; ++} ++ ++#include +Index: glibc-2.31/nss/tst-nss-gai-actions.root/etc/host.conf +=================================================================== +--- /dev/null ++++ glibc-2.31/nss/tst-nss-gai-actions.root/etc/host.conf +@@ -0,0 +1 @@ ++multi on +Index: glibc-2.31/nss/tst-nss-gai-actions.root/etc/hosts +=================================================================== +--- /dev/null ++++ glibc-2.31/nss/tst-nss-gai-actions.root/etc/hosts +@@ -0,0 +1,508 @@ ++192.0.0.1 example.org ++192.0.0.2 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++192.0.1.253 example.org ++192.0.1.254 example.org +Index: glibc-2.31/sysdeps/posix/getaddrinfo.c +=================================================================== +--- glibc-2.31.orig/sysdeps/posix/getaddrinfo.c ++++ glibc-2.31/sysdeps/posix/getaddrinfo.c +@@ -470,11 +470,6 @@ gaih_inet (const char *name, const struc + + if (name != NULL) + { +- at = alloca_account (sizeof (struct gaih_addrtuple), alloca_used); +- at->family = AF_UNSPEC; +- at->scopeid = 0; +- at->next = NULL; +- + if (req->ai_flags & AI_IDN) + { + char *out; +@@ -485,13 +480,21 @@ gaih_inet (const char *name, const struc + malloc_name = true; + } + +- if (__inet_aton_exact (name, (struct in_addr *) at->addr) != 0) ++ uint32_t addr[4]; ++ if (__inet_aton_exact (name, (struct in_addr *) addr) != 0) + { ++ at = alloca_account (sizeof (struct gaih_addrtuple), alloca_used); ++ at->scopeid = 0; ++ at->next = NULL; ++ + if (req->ai_family == AF_UNSPEC || req->ai_family == AF_INET) +- at->family = AF_INET; ++ { ++ memcpy (at->addr, addr, sizeof (at->addr)); ++ at->family = AF_INET; ++ } + else if (req->ai_family == AF_INET6 && (req->ai_flags & AI_V4MAPPED)) + { +- at->addr[3] = at->addr[0]; ++ at->addr[3] = addr[0]; + at->addr[2] = htonl (0xffff); + at->addr[1] = 0; + at->addr[0] = 0; +@@ -505,49 +508,62 @@ gaih_inet (const char *name, const struc + + if (req->ai_flags & AI_CANONNAME) + canon = name; ++ ++ goto process_list; + } +- else if (at->family == AF_UNSPEC) ++ ++ char *scope_delim = strchr (name, SCOPE_DELIMITER); ++ int e; ++ ++ if (scope_delim == NULL) ++ e = inet_pton (AF_INET6, name, addr); ++ else ++ e = __inet_pton_length (AF_INET6, name, scope_delim - name, addr); ++ ++ if (e > 0) + { +- char *scope_delim = strchr (name, SCOPE_DELIMITER); +- int e; +- if (scope_delim == NULL) +- e = inet_pton (AF_INET6, name, at->addr); +- else +- e = __inet_pton_length (AF_INET6, name, scope_delim - name, +- at->addr); +- if (e > 0) +- { +- if (req->ai_family == AF_UNSPEC || req->ai_family == AF_INET6) +- at->family = AF_INET6; +- else if (req->ai_family == AF_INET +- && IN6_IS_ADDR_V4MAPPED (at->addr)) +- { +- at->addr[0] = at->addr[3]; +- at->family = AF_INET; +- } +- else +- { +- result = -EAI_ADDRFAMILY; +- goto free_and_return; +- } ++ at = alloca_account (sizeof (struct gaih_addrtuple), ++ alloca_used); ++ at->scopeid = 0; ++ at->next = NULL; + +- if (scope_delim != NULL +- && __inet6_scopeid_pton ((struct in6_addr *) at->addr, +- scope_delim + 1, +- &at->scopeid) != 0) +- { +- result = -EAI_NONAME; +- goto free_and_return; +- } ++ if (req->ai_family == AF_UNSPEC || req->ai_family == AF_INET6) ++ { ++ memcpy (at->addr, addr, sizeof (at->addr)); ++ at->family = AF_INET6; ++ } ++ else if (req->ai_family == AF_INET ++ && IN6_IS_ADDR_V4MAPPED (addr)) ++ { ++ at->addr[0] = addr[3]; ++ at->addr[1] = addr[1]; ++ at->addr[2] = addr[2]; ++ at->addr[3] = addr[3]; ++ at->family = AF_INET; ++ } ++ else ++ { ++ result = -EAI_ADDRFAMILY; ++ goto free_and_return; ++ } + +- if (req->ai_flags & AI_CANONNAME) +- canon = name; ++ if (scope_delim != NULL ++ && __inet6_scopeid_pton ((struct in6_addr *) at->addr, ++ scope_delim + 1, ++ &at->scopeid) != 0) ++ { ++ result = -EAI_NONAME; ++ goto free_and_return; + } ++ ++ if (req->ai_flags & AI_CANONNAME) ++ canon = name; ++ ++ goto process_list; + } + +- if (at->family == AF_UNSPEC && (req->ai_flags & AI_NUMERICHOST) == 0) ++ if ((req->ai_flags & AI_NUMERICHOST) == 0) + { +- struct gaih_addrtuple **pat = &at; + int no_data = 0; + int no_inet6_data = 0; + service_user *nip; +@@ -555,6 +571,7 @@ gaih_inet (const char *name, const struc + enum nss_status status = NSS_STATUS_UNAVAIL; + int no_more; + struct resolv_context *res_ctx = NULL; ++ bool do_merge = false; + + /* If we do not have to look for IPv6 addresses or the canonical + name, use the simple, old functions, which do not support +@@ -591,7 +608,7 @@ gaih_inet (const char *name, const struc + result = -EAI_MEMORY; + goto free_and_return; + } +- *pat = addrmem; ++ at = addrmem; + } + else + { +@@ -644,6 +661,8 @@ gaih_inet (const char *name, const struc + } + + struct gaih_addrtuple *addrfree = addrmem; ++ struct gaih_addrtuple **pat = &at; ++ + for (int i = 0; i < air->naddrs; ++i) + { + socklen_t size = (air->family[i] == AF_INET +@@ -707,12 +726,6 @@ gaih_inet (const char *name, const struc + + free (air); + +- if (at->family == AF_UNSPEC) +- { +- result = -EAI_NONAME; +- goto free_and_return; +- } +- + goto process_list; + } + else if (err == 0) +@@ -750,6 +763,22 @@ gaih_inet (const char *name, const struc + + while (!no_more) + { ++ /* Always start afresh; continue should discard previous results ++ and the hosts database does not support merge. */ ++ at = NULL; ++ free (canonbuf); ++ free (addrmem); ++ canon = canonbuf = NULL; ++ addrmem = NULL; ++ got_ipv6 = false; ++ ++ if (do_merge) ++ { ++ __set_h_errno (NETDB_INTERNAL); ++ __set_errno (EBUSY); ++ break; ++ } ++ + no_data = 0; + nss_gethostbyname4_r fct4 = NULL; + +@@ -762,12 +791,14 @@ gaih_inet (const char *name, const struc + { + while (1) + { +- status = DL_CALL_FCT (fct4, (name, pat, ++ status = DL_CALL_FCT (fct4, (name, &at, + tmpbuf->data, tmpbuf->length, + &errno, &h_errno, + NULL)); + if (status == NSS_STATUS_SUCCESS) + break; ++ /* gethostbyname4_r may write into AT, so reset it. */ ++ at = NULL; + if (status != NSS_STATUS_TRYAGAIN + || errno != ERANGE || h_errno != NETDB_INTERNAL) + { +@@ -792,7 +823,9 @@ gaih_inet (const char *name, const struc + no_data = 1; + + if ((req->ai_flags & AI_CANONNAME) != 0 && canon == NULL) +- canon = (*pat)->name; ++ canon = at->name; ++ ++ struct gaih_addrtuple **pat = &at; + + while (*pat != NULL) + { +@@ -844,6 +877,8 @@ gaih_inet (const char *name, const struc + + if (fct != NULL) + { ++ struct gaih_addrtuple **pat = &at; ++ + if (req->ai_family == AF_INET6 + || req->ai_family == AF_UNSPEC) + { +@@ -917,6 +952,10 @@ gaih_inet (const char *name, const struc + if (nss_next_action (nip, status) == NSS_ACTION_RETURN) + break; + ++ /* The hosts database does not support MERGE. */ ++ if (nss_next_action (nip, status) == NSS_ACTION_MERGE) ++ do_merge = true; ++ + if (nip->next == NULL) + no_more = -1; + else +@@ -949,7 +988,7 @@ gaih_inet (const char *name, const struc + } + + process_list: +- if (at->family == AF_UNSPEC) ++ if (at == NULL) + { + result = -EAI_NONAME; + goto free_and_return; diff -Nru glibc-2.31/debian/patches/series glibc-2.31/debian/patches/series --- glibc-2.31/debian/patches/series 2023-07-26 07:44:39.000000000 +0000 +++ glibc-2.31/debian/patches/series 2023-11-20 15:35:43.000000000 +0000 @@ -171,3 +171,5 @@ lp2001975/0001-x86-Fix-__wcsncmp_avx2-in-strcmp-avx2.S-BZ-28755.patch lp2001975/0002-string-Add-a-testcase-for-wcsncmp-with-SIZE_MAX-BZ-2.patch +any/CVE-2023-4813.patch +any/CVE-2023-4806.patch diff -Nru glibc-2.31/debian/testsuite-xfail-debian.mk glibc-2.31/debian/testsuite-xfail-debian.mk --- glibc-2.31/debian/testsuite-xfail-debian.mk 2023-07-26 07:44:39.000000000 +0000 +++ glibc-2.31/debian/testsuite-xfail-debian.mk 2023-11-22 13:32:50.000000000 +0000 @@ -35,6 +35,8 @@ test-xfail-tst-nss-db-endgrent = yes test-xfail-tst-nss-files-hosts-long = yes test-xfail-tst-system = yes +test-xfail-tst-nss-gai-actions = yes +test-xfail-tst-nss-gai-hv2-canonname = yes # LP: #1891403 needs good entropy source test-xfail-tst-getrandom = yes