Asterisk Multiple Vulnerabilities (AST-2016-001 - AST-2016-003) (BEAST)
High Nessus Plugin ID 88715
SynopsisA telephony application running on the remote host is affected by multiple vulnerabilities.
DescriptionAccording to its SIP banner, the version of Asterisk running on the remote host is affected by the following vulnerabilities :
- An integer overflow condition exists in sip.conf due to improper validation of user-supplied input when handling 'timert1' values. A remote attacker can exploit this to cause a denial of service.
- An unspecified flaw exists due to improper handling of FAT data in UDPTL packets. A remote attacker can exploit this to cause a denial of service.
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
SolutionUpgrade to Asterisk version 11.21.1 / 13.7.1 / 11.6-cert12 / 13.1-cert3. Alternatively, apply the appropriate patch referenced in the vendor advisories.