UpHeron
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Servers and applications

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 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.

Severity
Medium 5.0
Published
24 Feb 2015
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
2.20
Exploit chance
5.8% in the next 30 daysHigher than 93% of CVEs. EPSS by FIRST, 11 Nov 2026
Weakness
CWE-17
Attack
Over the network · No login needed
Attacker can
Change some data
CVSS vector
AV:N/AC:L/Au:N/C:N/I:P/A:N
Sources
NVD

Affected software

SoftwareAffected versions
GNU C LibraryServers and applications · cpe:a:gnu:glibc
  • Every version before 2.20

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2013-7423
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2013-7423