- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200603-15 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Severity: Low Title: Crypt::CBC: Insecure initialization vector Date: March 17, 2006 Bugs: #126048 ID: 200603-15 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== Crypt::CBC uses an insecure initialization vector, potentially resulting in a weaker encryption. Background ========== Crypt::CBC is a Perl module to encrypt data using cipher block chaining (CBC). Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 dev-perl/crypt-cbc < 2.17 >= 2.17 Description =========== Lincoln Stein discovered that Crypt::CBC fails to handle 16 bytes long initializiation vectors correctly when running in the RandomIV mode, resulting in a weaker encryption because the second part of every block will always be encrypted with zeros if the blocksize of the cipher is greater than 8 bytes. Impact ====== An attacker could exploit weak ciphertext produced by Crypt::CBC to bypass certain security restrictions or to gain access to sensitive data. Workaround ========== There is no known workaround at this time. Resolution ========== All Crypt::CBC users should upgrade to the latest available version: # emerge --sync # emerge --ask --oneshot --verbose ">=dev-perl/crypt-cbc-2.17" References ========== [ 1 ] CVE-2006-0898 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-0898 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200603-15.xml 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 [EMAIL PROTECTED] or alternatively, you may file a bug at http://bugs.gentoo.org. License ======= Copyright 2006 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/2.0
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