CVE-2017-17850
HighSummary
An issue was discovered in Asterisk versions 13.18.4 and older, 14.7.4 and older, 15.1.4 and older, and 13.18-cert1 and older that causes a crash when processing certain SIP messages without a contact header. This issue occurs only when the PJSIP channel driver is used.
Risk Assessment
The risk to the organization is that unauthorized users could cause the Asterisk server to crash, leading to service availability interruptions. Enabling authentication mitigates this risk as it requires user authorization before reaching the crash point.
Recommendation
It is recommended to update Asterisk to the latest version to eliminate this vulnerability. Additionally, enabling authentication for SIP users can help minimize the risk.
Other vulnerabilities in Asterisk
See all- CVE-2017-14603High
In Asterisk 11.x before 11.25.3, 13.x before 13.17.2, and 14.x before 14.6.2, insufficient RTCP packet validation could allow reading stale buffer contents. When combined with the 'nat' and 'symmetric_rtp' options, this could allow redirecting where Asterisk sends the next RTCP report.
- CVE-2022-37325High
In Sangoma Asterisk through 16.28.0, 17.x and 18.x through 18.14.0, and 19.x through 19.6.0, an incoming Setup message to addons/ooh323c/src/ooq931.c with a malformed Calling or Called Party IE can cause a crash.
Original NVD description (English source)
An issue was discovered in Asterisk 13.18.4 and older, 14.7.4 and older, 15.1.4 and older, and 13.18-cert1 and older. A select set of SIP messages create a dialog in Asterisk. Those SIP messages must contain a contact header. For those messages, if the header was not present and the PJSIP channel driver was used, Asterisk would crash. The severity of this vulnerability is somewhat mitigated if authentication is enabled. If authentication is enabled, a user would have to first be authorized before reaching the crash point.