CVE-2022-40617: strongSwan before 5.9.8 allows remote attackers to cause a denial of service in the revocation plugin by sending a crafted end-entity (and intermediate CA) certificate that…

Description

strongSwan before 5.9.8 allows remote attackers to cause a denial of service in the revocation plugin by sending a crafted end-entity (and intermediate CA) certificate that contains a CRL/OCSP URL that points to a server (under the attacker's control) that doesn't properly respond but (for example) just does nothing after the initial TCP handshake, or sends an excessive amount of application data.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack vector

Network

Complexity

Low

Privileges

None

User interaction

None

Confidentiality

None

Integrity

None

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)1.8% · higher than 78% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

DL

Debian Linux · Debian

10.0; 11.0 · source: NVD

FE

Fedora · Fedoraproject

37 · source: NVD

SN

Stormshield Network Security · Stormshield

3.11.1 before 3.11.20; 4.3.1 before 4.3.15; 4.5.1 before 4.6.0 · source: NVD

ST

Strongswan · Strongswan

before 5.9.8 · source: NVD

UL

Ubuntu Linux · Canonical

14.04; 16.04; 18.04; 20.04; 22.04 · source: NVD