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Mageia: 2020-0023 Critical: OpenSSL Overflow Risk and Fix

Updated compat-openssl10 and openssl packages fix security vulnerability: There is an overflow bug in the x64_64 Montgomery squaring procedure used in exponentiation with 512-bit moduli. No EC algorithms are affected. Analysis suggests that attacks against 2-prime RSA1024, 3-prime RSA1536, . MGASA-2020-0023 - Updated openssl packages fix security vulnerability Publication date: 05 Jan 2020 URL: https://advisories.mageia.org/MGASA-2020-0023.html Type: security Affected Mageia releases: 7 CVE: CVE-2019-1551 Updated compat-openssl10 and openssl packages fix security vulnerability: There is an overflow bug in the x64_64 Montgomery squaring procedure used in exponentiation with 512-bit moduli. No EC algorithms are affected. Analysis suggests that attacks against 2-prime RSA1024, 3-prime RSA1536, and DSA1024 as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH512 are considered just feasible. However, for an attack the target would have to re-use the DH512 private key, which is not recommended anyway. Also applications directly using the low level API BN_mod_exp may be affected if they use BN_FLG_CONSTTIME (CVE-2019-1551). References: - https://bugs.mageia.org/show_bug.cgi?id=25977 - https://openssl-library.org/news/secadv/20191206.txt - https://www.cve.org/CVERecord?id=CVE-2019-1551 SRPMS: - 7/core/openssl-1.1.0l-1.1.mga7 - 7/core/compat-openssl10-1.0.2u-1.mga7 . Mageia 2020-0024 updates libcurl packages to address a security issue impacting data transmission. Essential for HTTPS vulnerabilities.. openssl Security, Mageia Advisory, Overflow Bug, RSA Attack, Open Source Security. . Severity: Critical. LinuxSecurity.com Team

Jan 05, 2020 •Critical Mageia