CVE-2020-27507

Publication date 15 March 2023

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

The Kamailio SIP before 5.5.0 server mishandles INVITE requests with duplicated fields and overlength tag, leading to a buffer overflow that crashes the server or possibly have unspecified other impact.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
kamailio	25.04 plucky	Not affected
	24.10 oracular	Not affected
	24.04 LTS noble	Not affected
	23.10 mantic	Ignored end of life, was needs-triage
	23.04 lunar	Ignored end of life, was needs-triage
	22.10 kinetic	Not affected
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Fixed 5.3.2-1ubuntu0.1~esm1
	18.04 LTS bionic	Fixed 5.1.2-1ubuntu2+esm1
	16.04 LTS xenial	Fixed 4.3.4-1.1ubuntu2.1+esm1
	14.04 LTS trusty	Not in release

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Severity score breakdown

Parameter	Value
Base score	9.8 · Critical
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-6022-1
Kamailio vulnerabilities
14 April 2023