========================================================================== Ubuntu Security Notice USN-5080-2 September 16, 2021 libgcrypt20 vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 16.04 ESM Summary: Libgcrypt could be made to expose sensitive information. Software Description: - libgcrypt20: LGPL Crypto library Details: USN-5080-1 fixed several vulnerabilities in Libgcrypt. This update provides the corresponding update for Ubuntu 16.04 ESM. Original advisory details: It was discovered that Libgcrypt incorrectly handled ElGamal encryption. An attacker could possibly use this issue to recover sensitive information. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 16.04 ESM: libgcrypt20 1.6.5-2ubuntu0.6+esm1 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-5080-2 https://ubuntu.com/security/notices/USN-5080-1 CVE-2021-33560, CVE-2021-40528