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Ubuntu 14.04 ESM: USN-4376-2 Critical: OpenSSL Padding Attacks

Several security issues were fixed in OpenSSL.. =========================================================================Ubuntu Security Notice USN-4376-2 July 09, 2020 openssl vulnerabilities ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 14.04 ESM - Ubuntu 12.04 ESM Summary: Several security issues were fixed in OpenSSL. Software Description: - openssl: Secure Socket Layer (SSL) cryptographic library and tools Details: USN-4376-1 fixed several vulnerabilities in OpenSSL. This update provides the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM. Original advisory details: Cesar Pereida García, Sohaib ul Hassan, Nicola Tuveri, Iaroslav Gridin, Alejandro Cabrera Aldaya, and Billy Brumley discovered that OpenSSL incorrectly handled ECDSA signatures. An attacker could possibly use this issue to perform a timing side-channel attack and recover private ECDSA keys. (CVE-2019-1547) Juraj Somorovsky, Robert Merget, and Nimrod Aviram discovered that certain applications incorrectly used OpenSSL and could be exposed to a padding oracle attack. A remote attacker could possibly use this issue to decrypt data. (CVE-2019-1559) Bernd Edlinger discovered that OpenSSL incorrectly handled certain decryption functions. In certain scenarios, a remote attacker could possibly use this issue to perform a padding oracle attack and decrypt traffic. (CVE-2019-1563) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 14.04 ESM: libssl1.0.0 1.0.1f-1ubuntu2.27+esm1 Ubuntu 12.04 ESM: libssl1.0.0 1.0.1-4ubuntu5.44 After a standard system update you need to reboot your computer to make all the necessary changes. References: https://ubuntu.com/security/notices/USN-4376-2 https://ubuntu.com/security/notices/USN-4376-1 CVE-2019-1547, CVE-2019-1559, CVE-2019-1563 . Advisory alert USN-4376-2 regarding Ubuntu mitigates OpenSSL weaknesses impacting numerous editions.. Ubuntu Security Notice, OpenSSL Issues, Cryptographic Vulnerabilities. . LinuxSecurity.com Team

Jul 09, 2020 Ubuntu