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Unrated severityNVD Advisory· Published Sep 27, 2013· Updated Jun 16, 2026

CVE-2013-5479

CVE-2013-5479

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

6
  • Cisco Systems, Inc./Cisco iOS6 versions
    cpe:2.3:o:cisco:ios:12.2:*:*:*:*:*:*:*+ 5 more
    • cpe:2.3:o:cisco:ios:12.2:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios:15.0:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios:15.1:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios:15.2:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios:15.3:*:*:*:*:*:*:*
    • (no CPE)range: 12.2, 15.0-15.3

Patches

Vulnerability mechanics

References

1

News mentions

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