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CVE-2017-3735

Status Candidate

Overview

While parsing an IPAddressFamily extension in an X.509 certificate, it is possible to do a one-byte overread. This would result in an incorrect text display of the certificate. This bug has been present since 2006 and is present in all versions of OpenSSL before 1.0.2m and 1.1.0g.

Related Files

Ubuntu Security Notice USN-3475-1
Posted Nov 6, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3475-1 - It was discovered that OpenSSL incorrectly parsed the IPAddressFamily extension in X.509 certificates, resulting in an erroneous display of the certificate in text format. It was discovered that OpenSSL incorrectly performed the x86_64 Montgomery squaring procedure. While unlikely, a remote attacker could possibly use this issue to recover private keys. This issue only applied to Ubuntu 16.04 LTS, Ubuntu 16.10 and Ubuntu 17.04. Various other issues were also addressed.

tags | advisory, remote
systems | linux, ubuntu
advisories | CVE-2017-3735, CVE-2017-3736
MD5 | 0c64cb5d962437f833874411911c027a
OpenSSL Toolkit 1.0.2m
Posted Nov 4, 2017
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: bn_sqrx8x_internal carry bug on x86_64 was addressed. A malformed X.509 IPAddressFamily out-of-bounds read was addressed.
tags | tool, encryption, protocol
systems | unix
advisories | CVE-2017-3735, CVE-2017-3736
MD5 | 10e9e37f492094b9ef296f68f24a7666
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