Crypt::CBC RandomIV header and Rijndael cipher weak encryption
| crypt-cbc-header-weak-encryption (24954) |  Low Risk |
Description:
Crypt::CBC uses a weak encryption algorithm when encrypting data using the legacy RandomIV header and the Rijindael cipher. This would result in weaker than expected data integrity and security.
Platforms Affected:
- Debian, Debian Linux 3.1
- Gentoo, Linux
- Lincoln D. Stein, Crypt::CBC 2.16 and prior
- RedHat, Network Satellite Server 4.2
- RedHat, Network Satellite Server 5.0
- RedHat, Network Satellite Server 5.1
Remedy:
Upgrade to the latest version of Crypt::CBC (2.17 or later), available from cpan.org. See References.
For Debian GNU/Linux:
Refer to DSA-996-1 for patch, upgrade, or suggested workaround information. See References.
For Gentoo Linux:
Refer to Gentoo Linux Security Announcement GLSA 2006-03-15 for patch, upgrade, or suggested workaround information. See References.
Consequences:
Bypass Security
References:
- BugTraq Mailing List, Thu Feb 23 2006 - 16:38:02 CST, Vulnerability in Crypt::CBC Perl module, versions <= 2.16 at http://archives.neohapsis.com/archives/bugtraq/2006-02/0438.html.
- cpan.org, Lincoln D. Stein / Crypt-CBC at http://search.cpan.org/dist/Crypt-CBC/.
- BID-16802: Lincoln D. Stein Crypt::CBC Perl Module Weak Ciphertext Vulnerability
- CVE-2006-0898: Crypt::CBC Perl module 2.16 and earlier, when running in RandomIV mode, uses an initialization vector (IV) of 8 bytes, which results in weaker encryption when used with a cipher that requires a larger block size than 8 bytes, such as Rijndael.
- DSA-996: libcrypt-cbc-perl -- programming error
- GLSA-200603-15: Crypt::CBC: Insecure initialization vector
- RHSA-2008-0261: Moderate: Red Hat Network Satellite Server security update
- RHSA-2008-0524: Low: Red Hat Network Satellite Server security update
- RHSA-2008-0630: Low: Red Hat Network Satellite Server security update
- SA18755: Crypt::CBC RandomIV Header IV Handling Security Issue
- SUSE-SR:2006:015: SUSE Security Summary Report
Reported:
Feb 23, 2006
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