Buffer overflow in Digium Asterisk
CVE-2018-7284
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.662 (99.3th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.422 · newest: 0.662 · change: +0.240
Affected products
- Digium Asterisk
- Digium Certified Asterisk — versions 13.18
- Debian Linux — versions 9.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- downloads.asterisk.org/pub/security/AST-2018-004.html (Patch, Vendor Advisory)
- www.exploit-db.com/exploits/44184/ (Exploit, VDB Entry, Third Party Advisory, exploit)
- www.debian.org/security/2018/dsa-4320 (vendor-advisory, Third Party Advisory)
- www.securityfocus.com/bid/103151 (VDB Entry, Third Party Advisory, vdb-entry)
- www.securitytracker.com/id/1040416 (VDB Entry, Third Party Advisory, vdb-entry)
Frequently asked questions
- What is CVE-2018-7284?
- CVE-2018-7284 is a high-severity vulnerability in Digium Asterisk, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2018-02-22.
- How severe is CVE-2018-7284?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2018-7284 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.