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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade strongswan | Mar 26, 2024 | Oct 18, 2021 |
| Debian | — | Upgrade strongswan | Nov 29, 2021 | Oct 18, 2021 |
| Dell Powerstore Dsa2023173 | — | Upgrade Dell PowerStoreOS to the latest version | Oct 23, 2025 | Jun 21, 2023 |
| Freebsd | — | Upgrade strongswan | Nov 4, 2022 | Jan 25, 2022 |
| Gentoo Linux | — | Upgrade net-vpn/strongswan. | May 6, 2024 | Oct 18, 2021 |
| Huawei Euleros 2_0_sp3 | — | Upgrade strongimcv | May 25, 2022 | Oct 18, 2021 |
| Huawei Euleros 2_0_sp5 | — | Upgrade strongimcv | Mar 22, 2022 | Oct 18, 2021 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Oct 18, 2021 |
| Suse | — | Upgrade strongswan-nmUpgrade strongswanUpgrade strongswan-hmacUpgrade strongswan-libs0Upgrade strongswan-docUpgrade strongswan-mysqlUpgrade strongswan-sqliteUpgrade strongswan-ipsec | Oct 20, 2021 | Oct 18, 2021 |
| Ubuntu | — | Upgrade libstrongswan (Ubuntu Pro)Upgrade strongswanUpgrade strongswan (Ubuntu Pro)Upgrade libstrongswan | Oct 20, 2021 | Oct 18, 2021 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Oct 18, 2021 |
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