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Fencer Vulns
critical 9.8

CVE-2018-8828 in the critical feed json

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.

published 2018-03-20 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-20436

cvss
9.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
30.4%
EPSS 30.4% chance of exploitation in 30 days, percentile 98%
public exploits
0
none known

Summary

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.

Patch / fix

  • kamailio kamailio 4.4.7, 5.0.6, 5.1.2
  • kamailio Debian 14, Debian 13, Debian 12 5.1.2-1

debian advisories DEBIAN-CVE-2018-8828

  • kamailio Ubuntu 16.04 LTS 4.3.4-1.1ubuntu2.1

ubuntu advisories UBUNTU-CVE-2018-8828

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kamailio Alpine 3.4 4.4.0-r2
  • kamailio Alpine 3.5 4.4.5-r1
  • kamailio Alpine 3.6 5.0.2-r2

alpine advisories ALPINE-CVE-2018-8828

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Exploit prediction

30.41% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.