CVE-2022-40617
strongswan - security update
7.5
HIGH
CVSS 3.1
EPSS 0.22%
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.
How to fix CVE-2022-40617
To remediate CVE-2022-40617, upgrade the affected package to a fixed version below.
- —upgrade to 5.9.1-r2 or later
- —upgrade to 5.9.1-1+deb11u3 or later
- —upgrade to 5.7.2-1+deb10u3 or later
- —upgrade to 5.9.1-1+deb11u3 or later
Is CVE-2022-40617 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (4)
- from 0, < 5.9.1-r2
- from 0, < 5.9.1-1+deb11u3
- from 0, < 5.7.2-1+deb10u3
- from 0, < 5.9.1-1+deb11u3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |