{"id":"CVE-2011-2529","aliases":["DEBIAN-CVE-2011-2529","DSA-2276-1","DSA-2276-2","EUVD-2011-2512","GHSA-xrm7-6c5j-p27r"],"status":"published","title":"chan_sip.c in the SIP channel driver in Asterisk Open Source 1.6.x before 1.6.2.18.1 and 1.8.x...","description":"chan_sip.c in the SIP channel driver in Asterisk Open Source 1.6.x before 1.6.2.18.1 and 1.8.x before 1.8.4.3 does not properly handle '\\0' characters in SIP packets, which allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via a crafted packet.","severity":{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.04276,"percentile":0.9116,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-119"],"published":"2011-07-06T19:00:00Z","modified":"2026-10-23T17:47:39Z","fixes":[{"ecosystem":"Debian:14","package":"asterisk","fixed_in":["1:1.8.4.3-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:14","package":"asterisk","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.8.4.3-1"}]}],"versions":["0.1.11-3","0.1.11-3woody1","1:1.0.5-2","1:1.0.5-4","1:1.0.6-1","1:1.0.6-2","1:1.0.7-1","1:1.0.7.dfsg.1-1","1:1.0.7.dfsg.1-2","1:1.0.7.dfsg.1-2sarge1","1:1.0.7.dfsg.1-2sarge2","1:1.0.7.dfsg.1-2sarge3","1:1.0.7.dfsg.1-2sarge4","1:1.0.7.dfsg.1-2sarge5","1:1.0.7.dfsg.1-2sarge6","1:1.0.9.dfsg-1","1:1.0.9.dfsg-3","1:1.0.9.dfsg-4","1:1.0.9.dfsg-5","1:1.0.9.dfsg-6","1:1.2.0-beta1.dfsg-1","1:1.2.0-beta2.dfsg-1","1:1.2.0-beta2.dfsg-2","1:1.2.0-beta2.dfsg-3","1:1.2.0-rc1.dfsg-1","1:1.2.0-rc2.dfsg-1","1:1.2.0.dfsg-1","1:1.2.0.dfsg-2","1:1.2.0.dfsg-3","1:1.2.0.dfsg-4","1:1.2.0.dfsg-5","1:1.2.0.dfsg-6","1:1.2.1.dfsg-1","1:1.2.1.dfsg-2","1:1.2.1.dfsg-3","1:1.2.10.dfsg-1","1:1.2.10.dfsg-1bpo1","1:1.2.10.dfsg-2","1:1.2.10.dfsg-3","1:1.2.11.dfsg-1","1:1.2.12.1.dfsg-1","1:1.2.13~dfsg-1","1:1.2.13~dfsg-2","1:1.2.13~dfsg-2etch1","1:1.2.13~dfsg-2etch2","1:1.2.13~dfsg-2etch3","1:1.2.13~dfsg-2etch4","1:1.2.14~dfsg-1","1:1.2.14~dfsg-2","1:1.2.14~dfsg-3","1:1.2.14~dfsg-4","1:1.2.15~dfsg-1","1:1.2.16~dfsg-1","1:1.2.17~dfsg-1","1:1.2.4.dfsg-1","1:1.2.4.dfsg-2","1:1.2.4.dfsg-3","1:1.2.4.dfsg-4","1:1.2.4.dfsg-5","1:1.2.4.dfsg-6","1:1.2.4.dfsg-6+b1","1:1.2.4.dfsg-7","1:1.2.7.1.dfsg-1","1:1.2.7.1.dfsg-2","1:1.2.7.1.dfsg-3","1:1.2.9.1.dfsg-1","1:1.4.10~dfsg-1","1:1.4.11~dfsg-1","1:1.4.11~dfsg-2","1:1.4.11~dfsg-3","1:1.4.11~dfsg-4","1:1.4.13~dfsg-1","1:1.4.15~dfsg-1","1:1.4.16.2~dfsg-1","1:1.4.16.2~dfsg-2","1:1.4.17~dfsg-1","1:1.4.17~dfsg-2","1:1.4.18.1~dfsg-1","1:1.4.18~dfsg-1","1:1.4.19.1~dfsg-1","1:1.4.20~dfsg-1","1:1.4.21.1~dfsg-1","1:1.4.21.2~dfsg-1","1:1.4.21.2~dfsg-2","1:1.4.21.2~dfsg-3","1:1.4.21.2~dfsg-3+lenny1","1:1.4.21.2~dfsg-3+lenny2","1:1.4.21.2~dfsg-3+lenny2.1","1:1.4.21.2~dfsg-3+lenny3","1:1.4.21.2~dfsg-3+lenny5","1:1.4.21.2~dfsg-3+lenny6","1:1.4.21.2~dfsg-3.1","1:1.4.2~dfsg-1","1:1.4.2~dfsg-2","1:1.4.2~dfsg-3","1:1.4.2~dfsg-4","1:1.4.2~dfsg-5","1:1.4.3~dfsg-1","1:1.4.4~dfsg-1","1:1.4.4~dfsg-2","1:1.4.4~dfsg-3","1:1.4.5~dfsg-1","1:1.4.6~dfsg-1","1:1.4.8~dfsg-1","1:1.4.8~dfsg-2","1:1.4.9~dfsg-1","1:1.6.1.0~dfsg-1","1:1.6.1.0~dfsg~rc3-1","1:1.6.2.0-1","1:1.6.2.0~dfsg~beta3-1","1:1.6.2.0~dfsg~rc1-1","1:1.6.2.0~rc3-1","1:1.6.2.0~rc3-2","1:1.6.2.0~rc6-1","1:1.6.2.0~rc7-1","1:1.6.2.2-1","1:1.6.2.6-1","1:1.6.2.7-1","1:1.6.2.9-1","1:1.6.2.9-1~bpo50+1","1:1.6.2.9-1~bpo50+2","1:1.6.2.9-1~bpo50+3","1:1.6.2.9-2","1:1.6.2.9-2+squeeze1","1:1.6.2.9-2+squeeze10","1:1.6.2.9-2+squeeze11","1:1.6.2.9-2+squeeze12","1:1.6.2.9-2+squeeze2","1:1.6.2.9-2+squeeze3","1:1.6.2.9-2+squeeze4","1:1.6.2.9-2+squeeze5","1:1.6.2.9-2+squeeze6","1:1.6.2.9-2+squeeze7","1:1.6.2.9-2+squeeze8","1:1.6.2.9-2+squeeze9","1:1.8.3.3-1","1:1.8.4-1","1:1.8.4.2-1"]},{"source":"osv","ecosystem":"Debian:6.0","package":"asterisk","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.6.2.9-2+squeeze3"}]}],"versions":["1:1.6.2.9-2","1:1.6.2.9-2+squeeze1","1:1.6.2.9-2+squeeze2"],"bundled":3},{"source":"osv","ecosystem":"Debian:5.0","package":"asterisk","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.4.21.2~dfsg-3+lenny3"}]}],"versions":["1:1.4.21.2~dfsg-3","1:1.4.21.2~dfsg-3+lenny1","1:1.4.21.2~dfsg-3+lenny2","1:1.4.21.2~dfsg-3+lenny2.1"],"bundled":3},{"source":"osv","ecosystem":"Debian:6.0","package":"asterisk","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.6.2.9-2+squeeze3"}]}],"versions":["1:1.6.2.9-2","1:1.6.2.9-2+squeeze1","1:1.6.2.9-2+squeeze2"],"bundled":3},{"source":"osv","ecosystem":"Debian:5.0","package":"asterisk","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.4.21.2~dfsg-3+lenny3"}]}],"versions":["1:1.4.21.2~dfsg-3","1:1.4.21.2~dfsg-3+lenny1","1:1.4.21.2~dfsg-3+lenny2","1:1.4.21.2~dfsg-3+lenny2.1"],"bundled":3}],"products":[{"vendor":"digium","product":"asterisk"}],"references":[{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/68203","tags":["vdb-entry","x_refsource_XF","x_transferred","web"]},{"url":"http://www.osvdb.org/73307","tags":["vdb-entry","x_refsource_OSVDB","x_transferred","web"]},{"url":"http://www.securityfocus.com/bid/48431","tags":["vdb-entry","x_refsource_BID","x_transferred","web"]},{"url":"http://downloads.asterisk.org/pub/security/AST-2011-008.html","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory"]},{"url":"http://secunia.com/advisories/45239","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","advisory"]},{"url":"http://downloads.asterisk.org/pub/security/AST-2011-008.diff","tags":["x_refsource_CONFIRM","x_transferred","Patch","fix"]},{"url":"http://www.debian.org/security/2011/dsa-2276","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred","advisory"]},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2011-July/062628.html","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"http://secunia.com/advisories/45048","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Vendor Advisory","advisory"]},{"url":"http://securitytracker.com/id?1025706","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred","web"]},{"url":"http://secunia.com/advisories/45201","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-2529"},{"url":"https://github.com/advisories/GHSA-xrm7-6c5j-p27r"},{"url":"https://security-tracker.debian.org/tracker/CVE-2011-2529","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2011-2529","description":"chan_sip.c in the SIP channel driver in Asterisk Open Source 1.6.x before 1.6.2.18.1 and 1.8.x before 1.8.4.3 does not properly handle '\\0' characters in SIP packets, which allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via a crafted packet.","status":"published","published":"2011-07-06T19:00:00Z","modified":"2024-08-06T23:08:22.019Z","updated_at":"2026-11-02T14:35:36.603688Z"}],"euvd":[{"id":"EUVD-2011-2512","description":"chan_sip.c in the SIP channel driver in Asterisk Open Source 1.6.x before 1.6.2.18.1 and 1.8.x before 1.8.4.3 does not properly handle '\\0' characters in SIP packets, which allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via a crafted packet.","status":"published","published":"2011-07-06T19:00:00Z","modified":"2024-08-06T23:08:22Z","updated_at":"2026-11-03T01:39:55.11051Z"}],"ghsa":[{"id":"GHSA-xrm7-6c5j-p27r","title":"chan_sip.c in the SIP channel driver in Asterisk Open Source 1.6.x before 1.6.2.18.1 and 1.8.x...","description":"chan_sip.c in the SIP channel driver in Asterisk Open Source 1.6.x before 1.6.2.18.1 and 1.8.x before 1.8.4.3 does not properly handle '\\0' characters in SIP packets, which allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via a crafted packet.","status":"published","published":"2022-05-17T01:54:55Z","modified":"2023-02-03T05:06:10Z","cwes":["CWE-119"],"updated_at":"2026-11-02T14:53:51.237254Z"}],"nvd":[{"id":"CVE-2011-2529","description":"chan_sip.c in the SIP channel driver in Asterisk Open Source 1.6.x before 1.6.2.18.1 and 1.8.x before 1.8.4.3 does not properly handle '\\0' characters in SIP packets, which allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via a crafted packet.","status":"published","published":"2011-07-06T19:55:03.45Z","modified":"2026-06-16T23:31:31.54Z","cvss":[{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-119"],"updated_at":"2026-11-02T14:02:09.182398Z"}],"osv":[{"id":"CVE-2011-2529","description":"chan_sip.c in the SIP channel driver in Asterisk Open Source 1.6.x before 1.6.2.18.1 and 1.8.x before 1.8.4.3 does not properly handle '\\0' characters in SIP packets, which allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via a crafted packet.","status":"published","published":"2011-07-06T19:55:03Z","modified":"2026-04-10T03:41:53.086269Z","updated_at":"2026-11-02T15:43:58.279353Z"},{"id":"DEBIAN-CVE-2011-2529","description":"chan_sip.c in the SIP channel driver in Asterisk Open Source 1.6.x before 1.6.2.18.1 and 1.8.x before 1.8.4.3 does not properly handle '\\0' characters in SIP packets, which allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via a crafted packet.","status":"published","published":"2011-07-06T19:55:03.45Z","modified":"2026-10-23T17:47:39.116483258Z","updated_at":"2026-11-02T15:45:24.612044Z"},{"id":"DSA-2276-1","title":"asterisk - multiple issues","status":"published","published":"2011-07-10T00:00:00Z","modified":"2026-03-09T01:18:08.996714Z","updated_at":"2026-11-02T15:46:15.108335Z"},{"id":"DSA-2276-2","title":"asterisk - multiple issues","status":"published","published":"2011-07-11T00:00:00Z","modified":"2026-03-09T01:21:43.906771Z","updated_at":"2026-11-02T15:46:15.108335Z"}]}}