CVE-2021-41991
strongswan - security update
7.5
HIGH
CVSS 3.1
EPSS 2.8%
Description
The in-memory certificate cache in strongSwan before 5.9.4 has a remote integer overflow upon receiving many requests with different certificates to fill the cache and later trigger the replacement of cache entries. The code attempts to select a less-often-used cache entry by means of a random number generator, but this is not done correctly. Remote code execution might be a slight possibility.
How to fix CVE-2021-41991
To remediate CVE-2021-41991, upgrade the affected package to a fixed version below.
- —upgrade to 5.8.4-r3 or later
- —upgrade to 5.9.1-1+deb11u1 or later
- —upgrade to 5.5.1-4+deb9u5 or later
Is CVE-2021-41991 being exploited?
Low — EPSS is 2.8%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 5.8.4-r3
- from 0, < 5.9.1-1+deb11u1
- from 0, < 5.5.1-4+deb9u5
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 |