● CVE — High
CVE-2021-41991
Vendordebian, fedoraproject, strongswan, siemensProductdebian linux, fedora, strongswan, sinema remote connect server, simatic net cp 1545-1 firmware, cp 1543-1 firmware, scalance sc622-2c firmware, scalance sc632-2c firmware, scalance sc636-2c firmware, scalance sc642-2c firmware, scalance sc646-2c firmware, simatic cp 1242-7 gprs v2 firmware, simatic cp 1243-1 firmware, simatic cp 1243-7 lte us firmware, simatic cp 1542sp-1 firmware, simatic cp 1542sp-1 irc firmware, simatic cp 1543sp-1 firmware, simatic net cp1243-7 lte eu firmware, simatic net cp 1243-8 irc firmware, siplus et 200sp cp 1542sp-1 irc tx rail firmware, siplus et 200sp cp 1543sp-1 isec firmware, siplus et 200sp cp 1543sp-1 isec tx rail firmware, siplus net cp 1543-1 firmware, siplus s7-1200 cp 1243-1 firmware, siplus s7-1200 cp 1243-1 rail firmwareDiscoveredOct 18, 2021UpdatedNov 21, 2024
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.