- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 201610-04 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: libgcrypt: Multiple vulnerabilities Date: October 10, 2016 Bugs: #541564, #559942, #574268, #591534 ID: 201610-04 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== Multiple vulnerabilities have been fixed in libgcrypt,the worst of which results in predictable output from the random number generator. Background ========== libgcrypt is a general purpose cryptographic library derived out of GnuPG. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 dev-libs/libgcrypt < 1.7.3 >= 1.7.3 Description =========== Multiple vulnerabilities have been discovered in libgcrypt. Please review the CVE identifiers referenced below for details. Impact ====== Side-channel attacks can leak private key information. A separate critical bug allows an attacker who obtains 4640 bits from the RNG to trivially predict the next 160 bits of output. Workaround ========== There is no known workaround at this time. Resolution ========== All libgcrypt users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=dev-libs/libgcrypt-1.7.3" References ========== [ 1 ] CVE-2014-3591 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-3591 [ 2 ] CVE-2015-0837 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-0837 [ 3 ] CVE-2015-7511 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-7511 [ 4 ] CVE-2016-6313 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-6313 [ 5 ] Factoring RSA Keys With TLS Perfect Forward Secrecy https://securityblog.redhat.com/2015/09/02/factoring-rsa-keys-with-tls-pe= rfect-forward-secrecy/ Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/201610-04 Concerns? ========= Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org. License ======= Copyright 2016 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license. http://creativecommons.org/licenses/by-sa/2.5