CVE-2021-41990

Publication date 18 October 2021

Last updated 18 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

The gmp plugin in strongSwan before 5.9.4 has a remote integer overflow via a crafted certificate with an RSASSA-PSS signature. For example, this can be triggered by an unrelated self-signed CA certificate sent by an initiator. Remote code execution cannot occur.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
strongswan	25.10 questing	Fixed 5.9.1-1ubuntu3.1
	25.04 plucky	Fixed 5.9.1-1ubuntu3.1
	24.10 oracular	Fixed 5.9.1-1ubuntu3.1
	24.04 LTS noble	Fixed 5.9.1-1ubuntu3.1
	23.10 mantic	Fixed 5.9.1-1ubuntu3.1
	23.04 lunar	Fixed 5.9.1-1ubuntu3.1
	22.10 kinetic	Fixed 5.9.1-1ubuntu3.1
	22.04 LTS jammy	Fixed 5.9.1-1ubuntu3.1
	21.10 impish	Fixed 5.9.1-1ubuntu3.1
	21.04 hirsute	Fixed 5.9.1-1ubuntu1.2
	20.04 LTS focal	Fixed 5.8.2-1ubuntu3.3
	18.04 LTS bionic	Fixed 5.6.2-1ubuntu2.7
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not affected

Notes

mdeslaur

affects 5.6.1+

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H