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Fencer Intel
critical 9.8

CVE-2018-14767 in the critical feed json

In Kamailio before 5.0.7 and 5.1.x before 5.1.4, a crafted SIP message with a double "To" header and an empty "To" tag causes a segmentatio…

published 2018-07-31 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-6653

cvss
9.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
29.3%
EPSS 29.3% chance of exploitation in 30 days, percentile 98%
public exploits
0
none known

Summary

In Kamailio before 5.0.7 and 5.1.x before 5.1.4, a crafted SIP message with a double "To" header and an empty "To" tag causes a segmentation fault and crash. The reason is missing input validation in the "build_res_buf_from_sip_req" core function. This could result in denial of service and potentially the execution of arbitrary code.

Patch / fix

  • kamailio kamailio 5.0.7, 5.1.4
  • kamailio Debian 14, Debian 13, Debian 12 5.1.4-1

debian advisories DEBIAN-CVE-2018-14767

  • kamailio Ubuntu Pro 16.04 LTS 4.3.4-1.1ubuntu2.1+esm2
  • kamailio Ubuntu Pro 18.04 LTS 5.1.2-1ubuntu2+esm2

ubuntu advisories UBUNTU-CVE-2018-14767

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 3.24, Alpine 3.23, Alpine 3.22 +15 more 5.1.4-r0
  • kamailio Alpine 3.6 5.0.2-r4

alpine advisories ALPINE-CVE-2018-14767

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

29.30% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • skalatan.de https://skalatan.de/blog/advisory-hw-2018-05 referenced PoC, tagged "exploit" by a source, unverified

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
  • CWE-20 Improper Input Validation

References

Sources

Fencer Intel 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.