VIR Vulnerability Intelligence Relay

CVE-2013-5479

high
Published 2013-09-27 · Modified 2026-04-29
CVSS v3
—
CVSS v2
7.8
VIR risk
7.8

Description

The DNS-over-TCP implementation in Cisco IOS 12.2 and 15.0 through 15.3, when NAT is used, allows remote attackers to cause a denial of service (device reload) via a crafted IPv4 DNS TCP stream, aka Bug ID CSCtn53730.

Predictions

Exploit likelihood
20%
Patch ETA
—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: psirt@cisco.com — http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130925-nat

References

CWEs

CWE-20

Verify integrity in audit chain (admin only). AS-IS.