CVE-2018-8828
A Buffer Overflow issue was discovered in Kamailio before 4.4.7, 5.0.x before 5.0.6, and 5.1.x before 5.1.2.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 30.4%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.
Description
A Buffer Overflow issue was discovered in Kamailio before 4.4.7, 5.0.x before 5.0.6, and 5.1.x before 5.1.2. A specially crafted REGISTER message with a malformed branch or From tag triggers an off-by-one heap-based buffer overflow in the tmx_check_pretran function in modules/tmx/tmx_pretran.c.
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 30.41% probability · 98th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-193, CWE-787
- Affected
- kamailio/kamailio · debian/debian linux
- Source
- cve@mitre.org
EPSS moved from 27.4% on 21 September 2026 to 30.4% on 27 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
References
- https://github.com/EnableSecurity/advisories/tree/master/ES2018-05-kamailio-heap-overflowThird Party Advisory
- https://github.com/kamailio/kamailio/commit/e1d8008a09d9390ebaf698abe8909e10dfec4097Patch, Third Party Advisory
- https://usn.ubuntu.com/4240-1/
- https://www.debian.org/security/2018/dsa-4148Third Party Advisory
- https://github.com/EnableSecurity/advisories/tree/master/ES2018-05-kamailio-heap-overflowThird Party Advisory
- https://github.com/kamailio/kamailio/commit/e1d8008a09d9390ebaf698abe8909e10dfec4097Patch, Third Party Advisory
- https://usn.ubuntu.com/4240-1/
- https://www.debian.org/security/2018/dsa-4148Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.