========================================================================== Ubuntu Security Notice USN-6488-2 December 14, 2023
strongswan vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 18.04 LTS (Available with Ubuntu Pro) - Ubuntu 16.04 LTS (Available with Ubuntu Pro) Summary: strongSwan could be made to crash or run programs if it received specially crafted network traffic. Software Description: - strongswan: IPsec VPN solution Details: USN-6488-1 fixed a vulnerability in strongSwan. This update provides the corresponding updates for Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. Original advisory details: Florian Picca discovered that strongSwan incorrectly handled certain DH public values. 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 18.04 LTS (Available with Ubuntu Pro): libstrongswan 5.6.2-1ubuntu2.9+esm1 strongswan 5.6.2-1ubuntu2.9+esm1 Ubuntu 16.04 LTS (Available with Ubuntu Pro): libstrongswan 5.3.5-1ubuntu3.8+esm4 strongswan 5.3.5-1ubuntu3.8+esm4 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-6488-2 https://ubuntu.com/security/notices/USN-6488-1 CVE-2023-41913
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