========================================================================== Ubuntu Security Notice USN-7841-1 October 27, 2025
strongswan vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 25.10 - Ubuntu 25.04 - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS Summary: strongSwan client could be made to crash or run programs if it received specially crafted network traffic. Software Description: - strongswan: IPsec VPN solution Details: Xu Biang discovered that the strongSwan client incorrectly handled EAP-MSCHAPv2 failure requests. If a user or automated system were tricked into connecting to a malicious server, a remote attacker could use this issue to cause strongSwan to crash, resulting in a denial of service, or possibly execute arbitrary code. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 25.10 libstrongswan 6.0.1-6ubuntu4.1 strongswan 6.0.1-6ubuntu4.1 Ubuntu 25.04 libstrongswan 5.9.13-2ubuntu4.25.04.1 strongswan 5.9.13-2ubuntu4.25.04.1 Ubuntu 24.04 LTS libstrongswan 5.9.13-2ubuntu4.24.04.1 strongswan 5.9.13-2ubuntu4.24.04.1 Ubuntu 22.04 LTS libstrongswan 5.9.5-2ubuntu2.4 strongswan 5.9.5-2ubuntu2.4 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-7841-1 CVE-2025-62291 Package Information: https://launchpad.net/ubuntu/+source/strongswan/6.0.1-6ubuntu4.1 https://launchpad.net/ubuntu/+source/strongswan/5.9.13-2ubuntu4.25.04.1 https://launchpad.net/ubuntu/+source/strongswan/5.9.13-2ubuntu4.24.04.1 https://launchpad.net/ubuntu/+source/strongswan/5.9.5-2ubuntu2.4
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