CVE-2021-41991
medium
CVSS v3
—
CVSS v2
—
VIR risk
5.5
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.
Predictions
Exploit likelihood
20%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-41991
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2021-41991.html
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 5.9.4-1 | |
| sles | affected | | |
| debian | bookworm | fixed | 5.9.4-1 |
| debian | bullseye | fixed | 5.9.1-1+deb11u1 |
| debian | forky | fixed | 5.9.4-1 |
| debian | sid | fixed | 5.9.4-1 |
| debian | trixie | fixed | 5.9.4-1 |
References
Verify integrity in audit chain (admin only). AS-IS.