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CVE-2013-7423

5.0 · MEDIUM

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…

Published Feb 24, 2015redhatCWE-17EPSS 5.81%

Overview

CVE-2013-7423 is a medium-severity vulnerability affecting redhat enterprise_linux_server_aus. It was published on February 24, 2015 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories and patches from redhat. Update enterprise_linux_server_aus to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
gnuglibc>= 0, < 2.20Affected

References

Reflists.opensuse.org/opensuse-updates/2015-02/msg00089.htmlRefpacketstormsecurity.com/files/164014/Moxa-Command-Injection-Cross-Site-Scripting-Vulnerable-Software.htmlRefrhn.redhat.com/errata/RHSA-2015-0863.htmlRefseclists.org/fulldisclosure/2021/Sep/0Refwww.openwall.com/lists/oss-security/2015/01/28/20Refwww.securityfocus.com/bid/72844Refwww.ubuntu.com/usn/USN-2519-1Refaccess.redhat.com/errata/RHSA-2016:1207GitHubgithub.com/golang/go/issues/6336Refsecurity.gentoo.org/glsa/201602-02

How CyberStrike helps

Frequently asked questions

What is CVE-2013-7423?

CVE-2013-7423 is a medium-severity vulnerability affecting redhat enterprise_linux_server_aus. It was published on February 24, 2015 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

How severe is CVE-2013-7423?

This vulnerability has a CVSS 2.0 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2013-7423?

Check the references section for vendor advisories and patches from redhat. Update enterprise_linux_server_aus to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2013-7423?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2013-7423 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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