VOIP: Digium Asterisk res_pjsip_pubsub Out-of-Bounds Write
This signature detects attempts to exploit a known vulnerability against Digium Asterisk. A successful attack can result in a denial-of-service condition.
Extended Description
A Buffer Overflow issue was discovered in Asterisk through 13.19.1, 14.x through 14.7.5, and 15.x through 15.2.1, and Certified Asterisk through 13.18-cert2. When processing a SUBSCRIBE request, the res_pjsip_pubsub module stores the accepted formats present in the Accept headers of the request. This code did not limit the number of headers it processed, despite having a fixed limit of 32. If more than 32 Accept headers were present, the code would write outside of its memory and cause a crash.
Affected Products
Debian debian_linux
References
CVE: CVE-2018-7284
Short Name
VOIP:SIP:AUDIT:DUPLICATE-HEADR2
Severity
Major
Recommended
False
Recommended Action
Drop
Category
VOIP
Keywords
Asterisk CVE-2018-7284 Digium Out-of-Bounds Write res_pjsip_pubsub
Release Date
12/02/2021
Supported Platforms
srx-branch-12.3
srx-19.3
srx-branch-19.3
vsrx3bsd-19.2
srx-branch-19.4
vsrx-19.4
mx-12.3
mx-19.4
vmx-19.4
mx-19.3
vsrx3bsd-19.4
srx-19.4
vsrx-12.3
vmx-19.3
vsrx-19.2
srx-12.3
Sigpack Version
3590
False Positive
Unknown
Vendors
Digium
Debian
CVSS Score
5.0