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Vulnerability record · CVE-2011-4063 · published 21 October 2011

CVE-2011-4063: Asterisk open source improper input validation vulnerability

Asterisk · Open Source

chan_sip.c in the SIP channel driver in Asterisk Open Source 1.8.x before 1.8.7.1 and 10.x before 10.0.0-rc1 does not properly initialize variables during request parsing, which allows remote authenticated users to cause a denial of service (daemon crash) via a malformed request.

6.8 CVSS 2.0 Medium EPSS 2.4% · top 16.8% CWE-20 · Improper input validation
6.8CVSS 2.0 base score
2.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
14References
16 Jun 2026Last modified by NVD

Description

chan_sip.c in the SIP channel driver in Asterisk Open Source 1.8.x before 1.8.7.1 and 10.x before 10.0.0-rc1 does not properly initialize variables during request parsing, which allows remote authenticated users to cause a denial of service (daemon crash) via a malformed request.

AV:N/AC:L/Au:S/C:N/I:N/A:C

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://downloads.digium.com/pub/security/AST-2011-012.html Vendor Advisory
http://secunia.com/advisories/46420
http://securityreason.com/securityalert/8478
http://www.securityfocus.com/archive/1/520141/100/0/threaded
http://www.securityfocus.com/bid/50177
http://www.securitytracker.com/id?1026191
https://exchange.xforce.ibmcloud.com/vulnerabilities/70706
http://downloads.digium.com/pub/security/AST-2011-012.html Vendor Advisory
http://secunia.com/advisories/46420
http://securityreason.com/securityalert/8478
http://www.securityfocus.com/archive/1/520141/100/0/threaded
http://www.securityfocus.com/bid/50177
http://www.securitytracker.com/id?1026191
https://exchange.xforce.ibmcloud.com/vulnerabilities/70706

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.0CVE-2012-2186Asterisk open source vulnerabilityIncomplete blacklist vulnerability in main/manager.c in Asterisk Open Source 1.8.x before 1.8.15.1 and 10.x before 10.7.1, Certified Asterisk 1.8.11 …EPSS 3.6%8.8CVE-2008-1332Asterisk permissions and access controls vulnerabilityUnspecified vulnerability in Asterisk Open Source 1.2.x before 1.2.27, 1.4.x before 1.4.18.1 and 1.4.19-rc3; Business Edition A.x.x, B.x.x before B.2…EPSS 2.3%7.8CVE-2009-2346Asterisk memory buffer overflow vulnerabilityThe IAX2 protocol implementation in Asterisk Open Source 1.2.x before 1.2.35, 1.4.x before 1.4.26.2, 1.6.0.x before 1.6.0.15, and 1.6.1.x before 1.6.…EPSS 2.6%7.8CVE-2008-3264Asterisk appliance developer kit improper authentication vulnerabilityThe FWDOWNL firmware-download implementation in Asterisk Open Source 1.0.x, 1.2.x before 1.2.30, and 1.4.x before 1.4.21.2; Business Edition A.x.x, B…EPSS 3.4%7.5CVE-2013-2685Asterisk open source memory buffer overflow vulnerabilityStack-based buffer overflow in res/res_format_attr_h264.c in Asterisk Open Source 11.x before 11.2.2 allows remote attackers to execute arbitrary cod…EPSS 2.6%7.5CVE-2008-1289Asterisk appliance developer kit memory buffer overflow vulnerabilityMultiple buffer overflows in Asterisk Open Source 1.4.x before 1.4.18.1 and 1.4.19-rc3, Open Source 1.6.x before 1.6.0-beta6, Business Edition C.x.x …EPSS 12%7.1CVE-2008-1923Asterisk appliance developer kit vulnerabilityThe IAX2 channel driver (chan_iax2) in Asterisk 1.2 before revision 72630 and 1.4 before revision 65679, when configured to allow unauthenticated cal…EPSS 1.4%6.5CVE-2012-2414Asterisk open source improper authentication vulnerabilitymain/manager.c in the Manager Interface in Asterisk Open Source 1.6.2.x before 1.6.2.24, 1.8.x before 1.8.11.1, and 10.x before 10.3.1 and Asterisk B…EPSS 2.7%

Source: NIST National Vulnerability Database (record CVE-2011-4063), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.