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FreeBSD: VID-58528A94-5100-4208-A04D-EDC01598CF01 (CVE-2021-41991): strongswan - denial-of-service vulnerability in the gmp plugin/denial-of-service vulnerability in the in-memory certificate cache

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FreeBSD: VID-58528A94-5100-4208-A04D-EDC01598CF01 (CVE-2021-41991): strongswan - denial-of-service vulnerability in the gmp plugin/denial-of-service vulnerability in the in-memory certificate cache

Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:P)
Published
10/04/2021
Created
11/08/2022
Added
11/04/2022
Modified
11/04/2022

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.

Solution(s)

  • freebsd-upgrade-package-strongswan

References

  • CVE-2021-41991
  • USN-5111-1
  • USN-5111-2

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