PT-2023-11761 · Unknown+2 · Kamailio Sip+2

Rnatella · Published 2023-03-15 · Updated 2025-02-27 · CVE-2020-27507

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Kamailio SIP versions prior to 5.5.0

Description The issue is related to the mishandling of INVITE requests with duplicated fields and overlength tags by the Kamailio SIP server, leading to a buffer overflow. This can cause the server to crash or potentially have other unspecified impacts.

Recommendations For versions prior to 5.5.0, update to version 5.5.0 or later to resolve the issue. As a temporary workaround, consider restricting access to INVITE requests with duplicated fields and overlength tags until a patch is applied.

Exploit

Fix

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

CVE-2020-27507

DLA-3438-1

USN-6022-1

Affected Products

Kamailio Sip

Linuxmint

Ubuntu

References · 19

• 🔥 https://github.com/kamailio/kamailio/issues/2503 · Exploit
• https://github.com/kamailio/kamailio/commit/ada3701d22b1fd579f06b4f54fa695fa988e685f · Patch
• https://ubuntu.com/security/CVE-2020-27507 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-16657 · Vendor Advisory
• https://osv.dev/vulnerability/USN-6022-1 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-6022-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-27507 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2020-27507 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-27507 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-27507 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2020-27507 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-27507 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-3438-1 · Vendor Advisory
• https://lists.debian.org/debian-lts-announce/2023/05/msg00030.html · Note
• https://t.me/cibsecurity/60090 · Telegram Post