CVE-2013-7423: n/a vulnerability

CVE-2013-7423: The send_dg function in resolv/res_send.c in GNU C Library (aka glibc or libc6) before 2.20 does not proper...

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.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 18:09 UTC (UTC+00:00)

Security readout for executives and security teams

This is an older GNU C Library resolver flaw. On vulnerable systems, heavy attacker-triggered DNS lookups could cause DNS queries to be sent to unintended destinations. The impact is unclear from the supplied sources, but glibc is a core dependency, so legacy Linux systems deserve focused review. Exposure is most likely on legacy Linux systems using glibc/libc6 before 2.20, especially network-facing services that perform attacker-influenced hostname resolution through getaddrinfo. The supplied affected-product data is incomplete. Treat this as a legacy exposure cleanup item unless a critical service depends on vulnerable glibc. Because severity and exploitation evidence are incomplete, prioritize inventory and patch verification over emergency response. Mitigation focus: Upgrade glibc/libc6 to version 2.20 or vendor-fixed packages.; Review Ubuntu, Red Hat, SUSE, and Gentoo advisories for distribution-specific fixes.; Prioritize internet-facing services that perform user-influenced DNS resolution..

Prepared: Jun 13, 2026, 22:56 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Feb 24, 2015, 15:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

5Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
https://github.com/golang/go/issues/6336CVE reference · x_refsource_CONFIRM
GLSA-201602-02CVE reference · vendor-advisory, x_refsource_GENTOO
https://sourceware.org/bugzilla/show_bug.cgi?id=15946CVE reference · x_refsource_CONFIRM
RHSA-2016:1207CVE reference · vendor-advisory, x_refsource_REDHAT

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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