Vulnerabilities > CVE-2011-2665 - Denial-Of-Service vulnerability in Asterisk
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
NONE Integrity impact
NONE Availability impact
PARTIAL Summary
reqresp_parser.c in the SIP channel driver in Asterisk Open Source 1.8.x before 1.8.4.3 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a SIP packet with a Contact header that lacks a < (less than) character. Per: http://cwe.mitre.org/data/definitions/476.html 'CWE-476: NULL Pointer Dereference'
Vulnerable Configurations
Nessus
NASL family Denial of Service NASL id ASTERISK_AST_2011_010.NASL description According to the version in its SIP banner, the version of Asterisk running on the remote host is potentially affected by multiple denial of service vulnerabilities : - If a remote user sends a SIP packet with a NULL, Asterisk reads data past the NULL even though the buffer is actually truncated when copied, which could lead to an application crash. (AST-2011-008) - A remote user sending a SIP packet containing a Contact header with a missing left angle bracket causes Asterisk to access a NULL pointer, which could cause the application to crash. (AST-2011-009) - A memory address can be inadvertently transmitted over the network via IAX2 via an option control frame, which would cause the remote party to try to access it. (AST-2011-010) last seen 2020-06-01 modified 2020-06-02 plugin id 55457 published 2011-06-29 reporter This script is Copyright (C) 2011-2018 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/55457 title Asterisk Multiple Channel Drivers Denial of Service (AST-2011-008 / AST-2011-009 / AST-2011-010) NASL family Gentoo Local Security Checks NASL id GENTOO_GLSA-201110-21.NASL description The remote host is affected by the vulnerability described in GLSA-201110-21 (Asterisk: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in Asterisk. Please review the CVE identifiers referenced below for details. Impact : An unauthenticated remote attacker may execute code with the privileges of the Asterisk process or cause a Denial of Service. Workaround : There is no known workaround at this time. last seen 2020-06-01 modified 2020-06-02 plugin id 56625 published 2011-10-25 reporter This script is Copyright (C) 2011-2018 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/56625 title GLSA-201110-21 : Asterisk: Multiple vulnerabilities NASL family Fedora Local Security Checks NASL id FEDORA_2011-8914.NASL description The Asterisk Development Team has announced the final maintenance release of Asterisk, version 1.6.2.19. This release is available for immediate download at http://downloads.asterisk.org/pub/telephony/asterisk/ Please note that Asterisk 1.6.2.19 is the final maintenance release from the 1.6.2 branch. Support for security related issues will continue until April 21, 2012. For more information about support of the various Asterisk branches, see https://wiki.asterisk.org/wiki/display/AST/Asterisk+Versions The release of Asterisk 1.6.2.19 resolves several issues reported by the community and would have not been possible without your participation. Thank you! The following is a sample of the issues resolved in this release : - Don last seen 2020-06-01 modified 2020-06-02 plugin id 55581 published 2011-07-13 reporter This script is Copyright (C) 2011-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/55581 title Fedora 14 : asterisk-1.6.2.19-1.fc14 (2011-8914)
References
- http://downloads.asterisk.org/pub/security/AST-2011-009.html
- http://downloads.asterisk.org/pub/security/AST-2011-009-1.8.diff
- http://lists.fedoraproject.org/pipermail/package-announce/2011-July/062628.html
- http://secunia.com/advisories/45048
- http://secunia.com/advisories/45201
- http://secunia.com/advisories/45239
- http://www.debian.org/security/2011/dsa-2276