Import Source
https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-6897.json
JSON Data
https://api.osv.dev/v1/vulns/AZL-6897
Upstream
Published
2021-10-18T14:15:10Z
Modified
2026-04-21T04:38:32.163922Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
CVE-2021-41991 affecting package strongswan for versions less than 5.9.5-1
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

Azure Linux:2 / strongswan

Package

Name
strongswan
Purl
pkg:rpm/azure-linux/strongswan

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.9.5-1

Database specific

source
"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-6897.json"