CVE-2018-7284
HighPublic exploitA 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.
Published Feb 21, 2018 · Updated Aug 4, 2026 · Also known as DEBIAN-CVE-2018-7284, UBUNTU-CVE-2018-7284
Key Facts
Patch immediately- CVE-2018-7284 is a high-severity vulnerability (CVSS 7.5 v3.1) affecting Asterisk (Digium), Certified Asterisk (Digium), Debian Linux.
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 66% probability of exploitation in the next 30 days.
- Fixed versions are available, including Asterisk 1:13.14.1~dfsg-2+deb9u4, Asterisk 1:13.20.0~dfsg-1, Asterisk <=13.19.1.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
7.5
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS (30-day exploit likelihood)
66%
Higher than 99.2% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2018-7284 brief as a PDF
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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
13 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| AsteriskDigium | See advisory | 13.19.1 |
| Certified AsteriskDigium | 13.18-cert1, 13.18-cert2 | 13.18 |
| Debian LinuxDebian | 9.0 | n/a |
Patched Releases
Asterisk
1:13.14.1~dfsg-2+deb9u4, 1:13.20.0~dfsg-1, <=13.19.1
Certified Asterisk
<=13.18
Timeline
Publicly disclosed
Feb 21, 2018
Last updated
Aug 4, 2026
Weakness Type
- CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
References
- advisoryhttps://security-tracker.debian.org/tracker/CVE-2018-7284
- advisoryhttps://ubuntu.com/security/CVE-2018-7284
- advisoryhttps://www.cve.org/CVERecord?id=CVE-2018-7284
- advisoryDSA-4320
- advisory103151
FAQ
Common Questions.
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.
Affected: Asterisk (Digium); Certified Asterisk (Digium) versions 13.18-cert1, 13.18-cert2; Debian Linux versions 9.0. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Asterisk 1:13.14.1~dfsg-2+deb9u4, Asterisk 1:13.20.0~dfsg-1, Asterisk <=13.19.1.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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