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Vulnerability record · CVE-2018-14767 · published 31 July 2018

CVE-2018-14767: Debian linux improper input validation vulnerability

Debian · Debian Linux

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.

9.8 CVSS 3.0 Critical EPSS 29% · top 1.9% CWE-20 · Improper input validation
9.8CVSS 3.0 base score, v2 7.5
29%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
6References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://lists.debian.org/debian-lts-announce/2018/08/msg00018.html Mailing ListThird Party Advisory
https://skalatan.de/blog/advisory-hw-2018-05 ExploitPatchThird Party Advisory
https://www.debian.org/security/2018/dsa-4267 Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/08/msg00018.html Mailing ListThird Party Advisory
https://skalatan.de/blog/advisory-hw-2018-05 ExploitPatchThird Party Advisory
https://www.debian.org/security/2018/dsa-4267 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2018-14767), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.