Test ID:	1.3.6.1.4.1.25623.1.0.147536
Category:	Denial of Service
Title:	OpenSSL: BN_mod_exp may produce incorrect results on MIPS (CVE-2021-4160) - Linux
Summary:	OpenSSL is prone to a carry propagation vulnerability.
Description:	Summary: OpenSSL is prone to a carry propagation vulnerability. Vulnerability Insight: There is a carry propagation bug in the MIPS32 and MIPS64 squaring procedure. Many EC algorithms are affected, including some of the TLS 1.3 default curves. Impact was not analyzed in detail, because the pre-requisites for attack are considered unlikely and include reusing private keys. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be significant. However, for an attack on TLS to be meaningful, the server would have to share the DH private key among multiple clients, which is no longer an option since CVE-2016-0701. Affected Software/OS: OpenSSL version 1.0.2, 1.1.1 and 3.0.0. Solution: Update to version 1.1.1m, 3.0.1 or later. CVSS Score: 4.3 CVSS Vector: AV:N/AC:M/Au:N/C:P/I:N/A:N
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2021-4160 https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=3bf7b73ea7123045b8f972badc67ed6878e6c37f https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=6fc1aaaf303185aa5e483e06bdfae16daa9193a7 https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=e9e726506cd2a3fd9c0f12daf8cc1fe934c7dddb https://www.openssl.org/news/secadv/20220128.txt Debian Security Information: DSA-5103 (Google Search) https://www.debian.org/security/2022/dsa-5103 https://security.gentoo.org/glsa/202210-02 https://www.oracle.com/security-alerts/cpuapr2022.html https://www.oracle.com/security-alerts/cpujul2022.html
Copyright	Copyright (C) 2022 Greenbone Networks GmbH

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