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CVE-2018-0733

Status Candidate

Overview

Because of an implementation bug the PA-RISC CRYPTO_memcmp function is effectively reduced to only comparing the least significant bit of each byte. This allows an attacker to forge messages that would be considered as authenticated in an amount of tries lower than that guaranteed by the security claims of the scheme. The module can only be compiled by the HP-UX assembler, so that only HP-UX PA-RISC targets are affected. Fixed in OpenSSL 1.1.0h (Affected 1.1.0-1.1.0g).

Related Files

Gentoo Linux Security Advisory 201811-21
Posted Nov 29, 2018
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201811-21 - Multiple vulnerabilities have been found in OpenSSL, the worst of which may lead to a Denial of Service condition. Versions less than 1.0.2o are affected.

tags | advisory, denial of service, vulnerability
systems | linux, gentoo
advisories | CVE-2018-0733, CVE-2018-0737, CVE-2018-0739
MD5 | c1102f7b8c5b3ed0dd1aed5afd6d2486
OpenSSL Toolkit 1.1.0h
Posted Mar 29, 2018
Site openssl.org

OpenSSL is a robust, fully featured Open Source toolkit implementing the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols with full-strength cryptography world-wide.

Changes: Addressed an issue where constructed ASN.1 types with a recursive definition could exceed the stack. Also address was an incorrect CRYPTO_memcmp on HP-UX PA-RISC amongst other issues.
tags | tool, encryption, protocol
systems | unix
advisories | CVE-2018-0733, CVE-2018-0739
MD5 | 5271477e4d93f4ea032b665ef095ff24
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