CVE-2013-7423

Name	CVE-2013-7423
Description	The 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.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
References	DLA-165-1
Debian Bugs	722075

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
glibc (PTS)	buster	2.28-10+deb10u1	fixed
	buster (security)	2.28-10+deb10u2	fixed
	bullseye	2.31-13+deb11u5	fixed
	bookworm, sid	2.36-8	fixed

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

Package	Type	Release	Fixed Version	Origin	Debian Bugs
eglibc	source	squeeze	2.11.3-4+deb6u5	DLA-165-1
eglibc	source	wheezy	2.13-38+deb7u5
eglibc	source	(unstable)	(unfixed)
glibc	source	(unstable)	2.19-1		722075

Notes

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