CVE-2017-17850
For those messages, if the header was not present and the PJSIP channel driver was used, Asterisk would crash.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 75.4%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
Description
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.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 75.35% probability · 99th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- digium/asterisk · digium/certified asterisk
- Source
- cve@mitre.org
References
- http://downloads.asterisk.org/pub/security/AST-2017-014.htmlVendor Advisory
- http://www.securitytracker.com/id/1040056Third Party Advisory, VDB Entry
- https://issues.asterisk.org/jira/browse/ASTERISK-27480Issue Tracking, Vendor Advisory
- https://security.gentoo.org/glsa/201811-11
- http://downloads.asterisk.org/pub/security/AST-2017-014.htmlVendor Advisory
- http://www.securitytracker.com/id/1040056Third Party Advisory, VDB Entry
- https://issues.asterisk.org/jira/browse/ASTERISK-27480Issue Tracking, Vendor Advisory
- https://security.gentoo.org/glsa/201811-11
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.