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| author | Carlos O'Donell <carlos@systemhalted.org> | 2016-02-16 21:26:37 -0500 |
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| committer | Carlos O'Donell <carlos@systemhalted.org> | 2016-02-16 21:29:32 -0500 |
| commit | e9db92d3acfe1822d56d11abcea5bfc4c41cf6ca (patch) | |
| tree | 67e2907fdad7c2a466e1aa996d48495c6016e3b3 /ChangeLog | |
| parent | 2c8f75f79bd6f3f4b3400a9f1a01a75e3086006b (diff) | |
| download | glibc-e9db92d3acfe1822d56d11abcea5bfc4c41cf6ca.tar.gz glibc-e9db92d3acfe1822d56d11abcea5bfc4c41cf6ca.tar.xz glibc-e9db92d3acfe1822d56d11abcea5bfc4c41cf6ca.zip | |
CVE-2015-7547: getaddrinfo() stack-based buffer overflow (Bug 18665).
* A stack-based buffer overflow was found in libresolv when invoked from libnss_dns, allowing specially crafted DNS responses to seize control of execution flow in the DNS client. The buffer overflow occurs in the functions send_dg (send datagram) and send_vc (send TCP) for the NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC family. The use of AF_UNSPEC triggers the low-level resolver code to send out two parallel queries for A and AAAA. A mismanagement of the buffers used for those queries could result in the response of a query writing beyond the alloca allocated buffer created by _nss_dns_gethostbyname4_r. Buffer management is simplified to remove the overflow. Thanks to the Google Security Team and Red Hat for reporting the security impact of this issue, and Robert Holiday of Ciena for reporting the related bug 18665. (CVE-2015-7547) See also: https://sourceware.org/ml/libc-alpha/2016-02/msg00416.html https://sourceware.org/ml/libc-alpha/2016-02/msg00418.html
Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/ChangeLog b/ChangeLog index a2b394e432..de3f55d315 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,4 +1,19 @@ -2016-02-14 Carlos O'Donelll <carlos@redhat.com> +2016-02-15 Carlos O'Donell <carlos@redhat.com> + + [BZ #18665] + * resolv/nss_dns/dns-host.c (gaih_getanswer_slice): Always set + *herrno_p. + (gaih_getanswer): Document functional behviour. Return tryagain + if any result is tryagain. + * resolv/res_query.c (__libc_res_nsearch): Set buffer size to zero + when freed. + * resolv/res_send.c: Add copyright text. + (__libc_res_nsend): Document that MAXPACKET is expected. + (send_vc): Document. Remove buffer reuse. + (send_dg): Document. Remove buffer reuse. Set *thisanssizp to set the + size of the buffer. Add Dprint for truncated UDP buffer. + +2016-02-14 Carlos O'Donell <carlos@redhat.com> * manual/install.texi: Latest tested is GCC 5.3, texinfo 6.0, gawk 4.1.3, and sed 4.2.2. Remove po2test.sed comments. |