DEBIAN-CVE-2021-41991

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Source
https://security-tracker.debian.org/tracker/CVE-2021-41991
Import Source
https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2021-41991.json
JSON Data
https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2021-41991
Upstream
Published
2021-10-18T14:15:10Z
Modified
2025-09-19T07:31:50.671038Z
Summary
[none]
Details

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.

References

Affected packages

Debian:11 / strongswan

Package

Name
strongswan
Purl
pkg:deb/debian/strongswan?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.9.1-1+deb11u1

Affected versions

5.*

5.9.1-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:12 / strongswan

Package

Name
strongswan
Purl
pkg:deb/debian/strongswan?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.9.4-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / strongswan

Package

Name
strongswan
Purl
pkg:deb/debian/strongswan?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.9.4-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:14 / strongswan

Package

Name
strongswan
Purl
pkg:deb/debian/strongswan?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.9.4-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}