CVE-2013-7423

NameCVE-2013-7423
DescriptionThe send_dg function in resolv/res_send.c in GNU C Library (aka glibc or libc6) before 2.20 does not properly reuse file descriptors, which allows remote attackers to send DNS queries to unintended locations via a large number of requests that trigger a call to the getaddrinfo function.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-165-1
NVD severitymedium (attack range: remote)
Debian Bugs722075

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
eglibc (PTS)wheezy2.13-38+deb7u10fixed
wheezy (security)2.13-38+deb7u12fixed
glibc (PTS)jessie (security), jessie2.19-18+deb8u10fixed
stretch (security), stretch2.24-11+deb9u1fixed
buster2.25-3fixed
sid2.25-4fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
eglibcsource(unstable)(unfixed)medium
eglibcsourcesqueeze2.11.3-4+deb6u5mediumDLA-165-1
eglibcsourcewheezy2.13-38+deb7u5medium
glibcsource(unstable)2.19-1medium722075

Notes

Fix: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=f9d2d03254a58d92635a311a42253eeed5a40a47
Upstream report: https://sourceware.org/bugzilla/show_bug.cgi?id=15946
http://www.openwall.com/lists/oss-security/2015/01/28/16

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