CVE-2013-7423

MEDIUM 5.0CVE-2013-7423 · Published 24/02/2015 · updated 17/06/2026

In short

CVE-2013-7423 is a MEDIUM (CVSS 5.0) vulnerability affecting glibc (gnu).
Chance of exploitation in the next 30 days (EPSS): 5.8%, higher than 93.1% of all vulnerabilities.
Fix: update to 2.20 or later.

Package	Affected versions	Patched versions
glibc gnu	`< 2.20`	`2.20`

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.

References

lists.opensuse.org/opensuse-updates/2015-02/msg00089.html · Third Party Advisory
packetstormsecurity.com/files/164014/Moxa-Command-Injection-Cross-Site-Scripting-Vulnerable-Software.html
rhn.redhat.com/errata/RHSA-2015-0863.html
seclists.org/fulldisclosure/2021/Sep/0
openwall.com/lists/oss-security/2015/01/28/20 · Mailing List
securityfocus.com/bid/72844 · Third Party Advisory
ubuntu.com/usn/USN-2519-1 · Third Party Advisory
access.redhat.com/errata/RHSA-2016:1207 · Third Party Advisory
golang/go · Third Party Advisory
security.gentoo.org/glsa/201602-02 · Third Party Advisory
sourceware.org/bugzilla/show_bug.cgi · Issue Tracking

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Package

Affected versions

Patched versions

glibc

gnu

< 2.20

2.20

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