{"id":"CVE-2013-5479","aliases":["EUVD-2013-5319","GHSA-gqwp-6ggw-g8ph"],"status":"published","title":"The DNS-over-TCP implementation in Cisco IOS 12.2 and 15.0 through 15.3, when NAT is used, allows...","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.","severity":{"version":"2.0","score":7.8,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:C","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.01887,"percentile":0.79668,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-20"],"published":"2013-09-27T10:00:00Z","modified":"2026-06-16T23:58:53Z","products":[{"vendor":"cisco","product":"ios"}],"references":[{"url":"http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130925-nat","tags":["vendor-advisory","x_refsource_CISCO","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2013-5479"},{"url":"https://github.com/advisories/GHSA-gqwp-6ggw-g8ph"}],"sources":{"cve":[{"id":"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.","status":"published","published":"2013-09-27T10:00:00Z","modified":"2024-09-16T23:26:02.27Z","updated_at":"2026-11-02T14:34:55.508771Z"}],"euvd":[{"id":"EUVD-2013-5319","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.","status":"published","published":"2013-09-27T10:00:00Z","modified":"2024-09-16T23:26:02Z","updated_at":"2026-11-03T00:54:50.852699Z"}],"ghsa":[{"id":"GHSA-gqwp-6ggw-g8ph","title":"The DNS-over-TCP implementation in Cisco IOS 12.2 and 15.0 through 15.3, when NAT is used, allows...","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.","status":"published","published":"2022-05-17T05:03:06Z","modified":"2023-01-28T05:03:06Z","cwes":["CWE-20"],"updated_at":"2026-11-02T14:43:54.46226Z"}],"nvd":[{"id":"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.","status":"published","published":"2013-09-27T10:08:04.32Z","modified":"2026-06-16T23:58:53.237Z","cvss":[{"version":"2.0","score":7.8,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:02:38.715467Z"}]}}