CVE-2013-7423

Original summary

Normalized public record · Updated Nov 3, 2026

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.

Publisher and source text is retained separately from QFinch interpretation.

Affected products

Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.

Remediation

Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.

1. Confirm the affected product and reachable code path exist in your environment.
2. Apply the vendor-supported patch or mitigation from the primary advisory.
3. Rescan the exact deployed revision and retain verification evidence.

Evidence coverage

SSVC priority

LOW

Confidence

Not available

Aliases

None reported

Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.

Sources and record history

1. GitHub advisory ↗
2. [oss-security] 20150128 Re: the other glibc issue ↗
3. openSUSE-SU-2015:0351 ↗
4. GLSA-201602-02 ↗
5. sourceware.org ↗
6. USN-2519-1 ↗
7. RHSA-2015:0863 ↗
8. 72844 ↗
9. RHSA-2016:1207 ↗
10. 20210901 SEC Consult SA-20210901-0 :: Multiple vulnerabilities in MOXA devices ↗
11. packetstormsecurity.com ↗

Record history

Published Feb 24, 2015 · Last refreshed Nov 3, 2026