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.
Created strongswan tracking bugs for this issue:
Affects: epel-all [bug 2015615]
Affects: fedora-all [bug 2015614]
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):