{"id":"CVE-2011-0520","aliases":["DEBIAN-CVE-2011-0520","DSA-2196-1","EUVD-2011-0540","GHSA-7vq7-qcwq-j3vc"],"status":"published","title":"The compress_add_dlabel_points function in dns/Compress.c in MaraDNS 1.4.03, 1.4.05, and probably...","description":"The compress_add_dlabel_points function in dns/Compress.c in MaraDNS 1.4.03, 1.4.05, and probably other versions allows remote attackers to cause a denial of service (segmentation fault) and possibly execute arbitrary code via a long DNS hostname with a large number of labels, which triggers a heap-based buffer overflow.","severity":{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.05169,"percentile":0.92498,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-119"],"published":"2011-01-28T15:00:00Z","modified":"2026-08-25T02:47:37Z","fixes":[{"ecosystem":"Debian:11","package":"maradns","fixed_in":["1.4.03-1.1"],"sources":["osv"]},{"ecosystem":"Debian:5.0","package":"maradns","fixed_in":["1.3.07.09-2.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:11","package":"maradns","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.03-1.1"}]}]},{"source":"osv","ecosystem":"Debian:5.0","package":"maradns","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.07.09-2.1"}]}],"versions":["1.3.07.09-2"]}],"products":[{"vendor":"maradns","product":"maradns"}],"references":[{"url":"http://www.vupen.com/english/advisories/2011/0699","tags":["vdb-entry","x_refsource_VUPEN","x_transferred","advisory"]},{"url":"http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=610834","tags":["x_refsource_CONFIRM","x_transferred","web"]},{"url":"http://www.openwall.com/lists/oss-security/2011/01/24/1","tags":["mailing-list","x_refsource_MLIST","x_transferred","web"]},{"url":"http://www.openwall.com/lists/oss-security/2011/01/24/6","tags":["mailing-list","x_refsource_MLIST","x_transferred","web"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/64885","tags":["vdb-entry","x_refsource_XF","x_transferred","web"]},{"url":"http://www.debian.org/security/2011/dsa-2196","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred","advisory"]},{"url":"http://secunia.com/advisories/43107","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","advisory"]},{"url":"http://secunia.com/advisories/43027","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Vendor Advisory","advisory"]},{"url":"http://osvdb.org/70630","tags":["vdb-entry","x_refsource_OSVDB","x_transferred","web"]},{"url":"http://www.securityfocus.com/bid/45966","tags":["vdb-entry","x_refsource_BID","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-0520"},{"url":"https://github.com/advisories/GHSA-7vq7-qcwq-j3vc"},{"url":"https://security-tracker.debian.org/tracker/CVE-2011-0520","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2011-0520","description":"The compress_add_dlabel_points function in dns/Compress.c in MaraDNS 1.4.03, 1.4.05, and probably other versions allows remote attackers to cause a denial of service (segmentation fault) and possibly execute arbitrary code via a long DNS hostname with a large number of labels, which triggers a heap-based buffer overflow.","status":"published","published":"2011-01-28T15:00:00Z","modified":"2024-08-06T21:58:25.928Z","updated_at":"2026-11-02T14:35:39.447402Z"}],"euvd":[{"id":"EUVD-2011-0540","description":"The compress_add_dlabel_points function in dns/Compress.c in MaraDNS 1.4.03, 1.4.05, and probably other versions allows remote attackers to cause a denial of service (segmentation fault) and possibly execute arbitrary code via a long DNS hostname with a large number of labels, which triggers a heap-based buffer overflow.","status":"published","published":"2011-01-28T15:00:00Z","modified":"2024-08-06T21:58:25Z","updated_at":"2026-11-03T01:56:00.140679Z"}],"ghsa":[{"id":"GHSA-7vq7-qcwq-j3vc","title":"The compress_add_dlabel_points function in dns/Compress.c in MaraDNS 1.4.03, 1.4.05, and probably...","description":"The compress_add_dlabel_points function in dns/Compress.c in MaraDNS 1.4.03, 1.4.05, and probably other versions allows remote attackers to cause a denial of service (segmentation fault) and possibly execute arbitrary code via a long DNS hostname with a large number of labels, which triggers a heap-based buffer overflow.","status":"published","published":"2022-05-17T02:02:12Z","modified":"2023-01-27T05:00:46Z","cwes":["CWE-119"],"updated_at":"2026-11-02T14:41:45.307734Z"}],"nvd":[{"id":"CVE-2011-0520","description":"The compress_add_dlabel_points function in dns/Compress.c in MaraDNS 1.4.03, 1.4.05, and probably other versions allows remote attackers to cause a denial of service (segmentation fault) and possibly execute arbitrary code via a long DNS hostname with a large number of labels, which triggers a heap-based buffer overflow.","status":"published","published":"2011-01-28T16:00:04.673Z","modified":"2026-06-16T23:27:33.143Z","cvss":[{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-119"],"updated_at":"2026-11-02T14:02:06.042049Z"}],"osv":[{"id":"CVE-2011-0520","description":"The compress_add_dlabel_points function in dns/Compress.c in MaraDNS 1.4.03, 1.4.05, and probably other versions allows remote attackers to cause a denial of service (segmentation fault) and possibly execute arbitrary code via a long DNS hostname with a large number of labels, which triggers a heap-based buffer overflow.","status":"published","published":"2011-01-28T16:00:04Z","modified":"2026-04-10T03:41:37.051521Z","updated_at":"2026-11-02T15:43:57.991581Z"},{"id":"DEBIAN-CVE-2011-0520","description":"The compress_add_dlabel_points function in dns/Compress.c in MaraDNS 1.4.03, 1.4.05, and probably other versions allows remote attackers to cause a denial of service (segmentation fault) and possibly execute arbitrary code via a long DNS hostname with a large number of labels, which triggers a heap-based buffer overflow.","status":"published","published":"2011-01-28T16:00:04.673Z","modified":"2026-08-25T02:47:37.389561157Z","updated_at":"2026-11-02T15:45:24.316685Z"},{"id":"DSA-2196-1","title":"maradns - buffer overflow","status":"published","published":"2011-03-19T00:00:00Z","modified":"2026-03-09T01:18:56.186987Z","updated_at":"2026-11-02T15:46:15.108335Z"}]}}