Race Condition Affecting glibc package, versions <0:2.17-105.el7


Severity

Recommended
medium

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.35% (73rd percentile)

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  • Snyk IDSNYK-RHEL7-GLIBC-4633719
  • published26 Jul 2021
  • disclosed12 Sept 2013

Introduced: 12 Sep 2013

CVE-2013-7423  (opens in a new tab)
CWE-362  (opens in a new tab)
CWE-201  (opens in a new tab)

How to fix?

Upgrade RHEL:7 glibc to version 0:2.17-105.el7 or higher.
This issue was patched in RHSA-2015:2199.

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc package and not the glibc package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

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.

CVSS Scores

version 3.1