From 02ab4bdbf71d0fc9383578aaee5ce641bad9bc81 Mon Sep 17 00:00:00 2001 From: George McCollister Date: Tue, 21 Nov 2017 14:01:20 -0600 Subject: glibc: Fix CVE-2015-5180 Add backported patch to fix CVE-2015-5180 from the upstream release/2.24/master branch. (From OE-Core rev: e8a6e3894c8aebac4aa6b0ceea021b95e94e6691) Signed-off-by: George McCollister Signed-off-by: Armin Kuster Signed-off-by: Richard Purdie --- ...80-resolv-Fix-crash-with-internal-QTYPE-B.patch | 357 +++++++++++++++++++++ meta/recipes-core/glibc/glibc_2.24.bb | 1 + 2 files changed, 358 insertions(+) create mode 100644 meta/recipes-core/glibc/glibc/0001-CVE-2015-5180-resolv-Fix-crash-with-internal-QTYPE-B.patch (limited to 'meta/recipes-core') diff --git a/meta/recipes-core/glibc/glibc/0001-CVE-2015-5180-resolv-Fix-crash-with-internal-QTYPE-B.patch b/meta/recipes-core/glibc/glibc/0001-CVE-2015-5180-resolv-Fix-crash-with-internal-QTYPE-B.patch new file mode 100644 index 0000000000..ba0bebe488 --- /dev/null +++ b/meta/recipes-core/glibc/glibc/0001-CVE-2015-5180-resolv-Fix-crash-with-internal-QTYPE-B.patch @@ -0,0 +1,357 @@ +From ff9b7c4fb73295cd2de2d2ccfbbf4f6d50883d47 Mon Sep 17 00:00:00 2001 +From: Florian Weimer +Date: Sat, 31 Dec 2016 20:22:09 +0100 +Subject: [PATCH] CVE-2015-5180: resolv: Fix crash with internal QTYPE [BZ + #18784] + +Also rename T_UNSPEC because an upcoming public header file +update will use that name. + +(cherry picked from commit fc82b0a2dfe7dbd35671c10510a8da1043d746a5) + +Upstream-Status: Backport +https://sourceware.org/git/?p=glibc.git;a=patch;h=b3b37f1a5559a7620e31c8053ed1b44f798f2b6d + +CVE: CVE-2015-5180 + +Signed-off-by: George McCollister +--- + ChangeLog | 14 ++++ + NEWS | 6 ++ + include/arpa/nameser_compat.h | 6 +- + resolv/Makefile | 5 ++ + resolv/nss_dns/dns-host.c | 2 +- + resolv/res_mkquery.c | 4 + + resolv/res_query.c | 6 +- + resolv/tst-resolv-qtypes.c | 185 ++++++++++++++++++++++++++++++++++++++++++ + 8 files changed, 221 insertions(+), 7 deletions(-) + create mode 100644 resolv/tst-resolv-qtypes.c + +diff --git a/ChangeLog b/ChangeLog +index 893262de11..2bdaf69e43 100644 +--- a/ChangeLog ++++ b/ChangeLog +@@ -1,3 +1,17 @@ ++2016-12-31 Florian Weimer ++ ++ [BZ #18784] ++ CVE-2015-5180 ++ * include/arpa/nameser_compat.h (T_QUERY_A_AND_AAAA): Rename from ++ T_UNSPEC. Adjust value. ++ * resolv/nss_dns/dns-host.c (_nss_dns_gethostbyname4_r): Use it. ++ * resolv/res_query.c (__libc_res_nquery): Likewise. ++ * resolv/res_mkquery.c (res_nmkquery): Check for out-of-range ++ QTYPEs. ++ * resolv/tst-resolv-qtypes.c: New file. ++ * resolv/Makefile (xtests): Add tst-resolv-qtypes. ++ (tst-resolv-qtypes): Link against libresolv and libpthread. ++ + 2016-10-26 Carlos O'Donell + + * include/atomic.h +diff --git a/NEWS b/NEWS +index 3002773c16..4b1ca3cb65 100644 +--- a/NEWS ++++ b/NEWS +@@ -11,6 +11,12 @@ using `glibc' in the "product" field. + printers show various pthread variables in human-readable form when read + using the 'print' or 'display' commands in gdb. + ++* The DNS stub resolver functions would crash due to a NULL pointer ++ dereference when processing a query with a valid DNS question type which ++ was used internally in the implementation. The stub resolver now uses a ++ question type which is outside the range of valid question type values. ++ (CVE-2015-5180) ++ + Version 2.24 + + * The minimum Linux kernel version that this version of the GNU C Library +diff --git a/include/arpa/nameser_compat.h b/include/arpa/nameser_compat.h +index 2e735ede4c..7c0deed9ae 100644 +--- a/include/arpa/nameser_compat.h ++++ b/include/arpa/nameser_compat.h +@@ -1,8 +1,8 @@ + #ifndef _ARPA_NAMESER_COMPAT_ + #include + +-/* Picksome unused number to represent lookups of IPv4 and IPv6 (i.e., +- T_A and T_AAAA). */ +-#define T_UNSPEC 62321 ++/* The number is outside the 16-bit RR type range and is used ++ internally by the implementation. */ ++#define T_QUERY_A_AND_AAAA 439963904 + + #endif +diff --git a/resolv/Makefile b/resolv/Makefile +index 8be41d3ae1..a4c86b9762 100644 +--- a/resolv/Makefile ++++ b/resolv/Makefile +@@ -40,6 +40,9 @@ ifeq ($(have-thread-library),yes) + extra-libs += libanl + routines += gai_sigqueue + tests += tst-res_hconf_reorder ++ ++# This test sends millions of packets and is rather slow. ++xtests += tst-resolv-qtypes + endif + extra-libs-others = $(extra-libs) + libresolv-routines := gethnamaddr res_comp res_debug \ +@@ -117,3 +120,5 @@ tst-leaks2-ENV = MALLOC_TRACE=$(objpfx)tst-leaks2.mtrace + $(objpfx)mtrace-tst-leaks2.out: $(objpfx)tst-leaks2.out + $(common-objpfx)malloc/mtrace $(objpfx)tst-leaks2.mtrace > $@; \ + $(evaluate-test) ++ ++$(objpfx)tst-resolv-qtypes: $(objpfx)libresolv.so $(shared-thread-library) +diff --git a/resolv/nss_dns/dns-host.c b/resolv/nss_dns/dns-host.c +index 5f9e35701b..d16fa4b8ed 100644 +--- a/resolv/nss_dns/dns-host.c ++++ b/resolv/nss_dns/dns-host.c +@@ -323,7 +323,7 @@ _nss_dns_gethostbyname4_r (const char *name, struct gaih_addrtuple **pat, + + int olderr = errno; + enum nss_status status; +- int n = __libc_res_nsearch (&_res, name, C_IN, T_UNSPEC, ++ int n = __libc_res_nsearch (&_res, name, C_IN, T_QUERY_A_AND_AAAA, + host_buffer.buf->buf, 2048, &host_buffer.ptr, + &ans2p, &nans2p, &resplen2, &ans2p_malloced); + if (n >= 0) +diff --git a/resolv/res_mkquery.c b/resolv/res_mkquery.c +index 12f9730199..d80b5318e5 100644 +--- a/resolv/res_mkquery.c ++++ b/resolv/res_mkquery.c +@@ -103,6 +103,10 @@ res_nmkquery(res_state statp, + int n; + u_char *dnptrs[20], **dpp, **lastdnptr; + ++ if (class < 0 || class > 65535 ++ || type < 0 || type > 65535) ++ return -1; ++ + #ifdef DEBUG + if (statp->options & RES_DEBUG) + printf(";; res_nmkquery(%s, %s, %s, %s)\n", +diff --git a/resolv/res_query.c b/resolv/res_query.c +index 944d1a90f5..07dc6f6583 100644 +--- a/resolv/res_query.c ++++ b/resolv/res_query.c +@@ -122,7 +122,7 @@ __libc_res_nquery(res_state statp, + int n, use_malloc = 0; + u_int oflags = statp->_flags; + +- size_t bufsize = (type == T_UNSPEC ? 2 : 1) * QUERYSIZE; ++ size_t bufsize = (type == T_QUERY_A_AND_AAAA ? 2 : 1) * QUERYSIZE; + u_char *buf = alloca (bufsize); + u_char *query1 = buf; + int nquery1 = -1; +@@ -137,7 +137,7 @@ __libc_res_nquery(res_state statp, + printf(";; res_query(%s, %d, %d)\n", name, class, type); + #endif + +- if (type == T_UNSPEC) ++ if (type == T_QUERY_A_AND_AAAA) + { + n = res_nmkquery(statp, QUERY, name, class, T_A, NULL, 0, NULL, + query1, bufsize); +@@ -190,7 +190,7 @@ __libc_res_nquery(res_state statp, + if (__builtin_expect (n <= 0, 0) && !use_malloc) { + /* Retry just in case res_nmkquery failed because of too + short buffer. Shouldn't happen. */ +- bufsize = (type == T_UNSPEC ? 2 : 1) * MAXPACKET; ++ bufsize = (type == T_QUERY_A_AND_AAAA ? 2 : 1) * MAXPACKET; + buf = malloc (bufsize); + if (buf != NULL) { + query1 = buf; +diff --git a/resolv/tst-resolv-qtypes.c b/resolv/tst-resolv-qtypes.c +new file mode 100644 +index 0000000000..b3e60c693b +--- /dev/null ++++ b/resolv/tst-resolv-qtypes.c +@@ -0,0 +1,185 @@ ++/* Exercise low-level query functions with different QTYPEs. ++ Copyright (C) 2016 Free Software Foundation, Inc. ++ 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 ++ ++/* If ture, the response function will send the actual response packet ++ over TCP instead of UDP. */ ++static volatile bool force_tcp; ++ ++/* Send back a fake resource record matching the QTYPE. */ ++static void ++response (const struct resolv_response_context *ctx, ++ struct resolv_response_builder *b, ++ const char *qname, uint16_t qclass, uint16_t qtype) ++{ ++ if (force_tcp && ctx->tcp) ++ { ++ resolv_response_init (b, (struct resolv_response_flags) { .tc = 1 }); ++ resolv_response_add_question (b, qname, qclass, qtype); ++ return; ++ } ++ ++ resolv_response_init (b, (struct resolv_response_flags) { }); ++ resolv_response_add_question (b, qname, qclass, qtype); ++ resolv_response_section (b, ns_s_an); ++ resolv_response_open_record (b, qname, qclass, qtype, 0); ++ resolv_response_add_data (b, &qtype, sizeof (qtype)); ++ resolv_response_close_record (b); ++} ++ ++static const const char *domain = "www.example.com"; ++ ++static int ++wrap_res_query (int type, unsigned char *answer, int answer_length) ++{ ++ return res_query (domain, C_IN, type, answer, answer_length); ++} ++ ++static int ++wrap_res_search (int type, unsigned char *answer, int answer_length) ++{ ++ return res_query (domain, C_IN, type, answer, answer_length); ++} ++ ++static int ++wrap_res_querydomain (int type, unsigned char *answer, int answer_length) ++{ ++ return res_querydomain ("www", "example.com", C_IN, type, ++ answer, answer_length); ++} ++ ++static int ++wrap_res_send (int type, unsigned char *answer, int answer_length) ++{ ++ unsigned char buf[512]; ++ int ret = res_mkquery (QUERY, domain, C_IN, type, ++ (const unsigned char *) "", 0, NULL, ++ buf, sizeof (buf)); ++ if (type < 0 || type >= 65536) ++ { ++ /* res_mkquery fails for out-of-range record types. */ ++ TEST_VERIFY_EXIT (ret == -1); ++ return -1; ++ } ++ TEST_VERIFY_EXIT (ret > 12); /* DNS header length. */ ++ return res_send (buf, ret, answer, answer_length); ++} ++ ++static int ++wrap_res_nquery (int type, unsigned char *answer, int answer_length) ++{ ++ return res_nquery (&_res, domain, C_IN, type, answer, answer_length); ++} ++ ++static int ++wrap_res_nsearch (int type, unsigned char *answer, int answer_length) ++{ ++ return res_nquery (&_res, domain, C_IN, type, answer, answer_length); ++} ++ ++static int ++wrap_res_nquerydomain (int type, unsigned char *answer, int answer_length) ++{ ++ return res_nquerydomain (&_res, "www", "example.com", C_IN, type, ++ answer, answer_length); ++} ++ ++static int ++wrap_res_nsend (int type, unsigned char *answer, int answer_length) ++{ ++ unsigned char buf[512]; ++ int ret = res_nmkquery (&_res, QUERY, domain, C_IN, type, ++ (const unsigned char *) "", 0, NULL, ++ buf, sizeof (buf)); ++ if (type < 0 || type >= 65536) ++ { ++ /* res_mkquery fails for out-of-range record types. */ ++ TEST_VERIFY_EXIT (ret == -1); ++ return -1; ++ } ++ TEST_VERIFY_EXIT (ret > 12); /* DNS header length. */ ++ return res_nsend (&_res, buf, ret, answer, answer_length); ++} ++ ++static void ++test_function (const char *fname, ++ int (*func) (int type, ++ unsigned char *answer, int answer_length)) ++{ ++ unsigned char buf[512]; ++ for (int tcp = 0; tcp < 2; ++tcp) ++ { ++ force_tcp = tcp; ++ for (unsigned int type = 1; type <= 65535; ++type) ++ { ++ if (test_verbose) ++ printf ("info: sending QTYPE %d with %s (tcp=%d)\n", ++ type, fname, tcp); ++ int ret = func (type, buf, sizeof (buf)); ++ if (ret != 47) ++ FAIL_EXIT1 ("%s tcp=%d qtype=%d return value %d", ++ fname,tcp, type, ret); ++ /* One question, one answer record. */ ++ TEST_VERIFY (memcmp (buf + 4, "\0\1\0\1\0\0\0\0", 8) == 0); ++ /* Question section. */ ++ static const char qname[] = "\3www\7example\3com"; ++ size_t qname_length = sizeof (qname); ++ TEST_VERIFY (memcmp (buf + 12, qname, qname_length) == 0); ++ /* RDATA part of answer. */ ++ uint16_t type16 = type; ++ TEST_VERIFY (memcmp (buf + ret - 2, &type16, sizeof (type16)) == 0); ++ } ++ } ++ ++ TEST_VERIFY (func (-1, buf, sizeof (buf) == -1)); ++ TEST_VERIFY (func (65536, buf, sizeof (buf) == -1)); ++} ++ ++static int ++do_test (void) ++{ ++ struct resolv_redirect_config config = ++ { ++ .response_callback = response, ++ }; ++ struct resolv_test *obj = resolv_test_start (config); ++ ++ test_function ("res_query", &wrap_res_query); ++ test_function ("res_search", &wrap_res_search); ++ test_function ("res_querydomain", &wrap_res_querydomain); ++ test_function ("res_send", &wrap_res_send); ++ ++ test_function ("res_nquery", &wrap_res_nquery); ++ test_function ("res_nsearch", &wrap_res_nsearch); ++ test_function ("res_nquerydomain", &wrap_res_nquerydomain); ++ test_function ("res_nsend", &wrap_res_nsend); ++ ++ resolv_test_end (obj); ++ return 0; ++} ++ ++#define TIMEOUT 300 ++#include +-- +2.15.0 + diff --git a/meta/recipes-core/glibc/glibc_2.24.bb b/meta/recipes-core/glibc/glibc_2.24.bb index e723e03dcf..4c7d901149 100644 --- a/meta/recipes-core/glibc/glibc_2.24.bb +++ b/meta/recipes-core/glibc/glibc_2.24.bb @@ -45,6 +45,7 @@ SRC_URI = "${GLIBC_GIT_URI};branch=${SRCBRANCH};name=glibc \ file://0004-New-condvar-implementation-that-provides-stronger-or.patch \ file://0005-Remove-__ASSUME_REQUEUE_PI.patch \ file://0006-Fix-atomic_fetch_xor_release.patch \ + file://0001-CVE-2015-5180-resolv-Fix-crash-with-internal-QTYPE-B.patch \ " SRC_URI += "\ -- cgit v1.2.3-54-g00ecf