GLSA-200603-15 : Crypt::CBC: Insecure initialization vector

This script is Copyright (C) 2006-2014 Tenable Network Security, Inc.


Synopsis :

The remote Gentoo host is missing one or more security-related
patches.

Description :

The remote host is affected by the vulnerability described in GLSA-200603-15
(Crypt::CBC: Insecure initialization vector)

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.

See also :

http://www.gentoo.org/security/en/glsa/glsa-200603-15.xml

Solution :

All Crypt::CBC users should upgrade to the latest available
version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=dev-perl/crypt-cbc-2.17'

Risk factor :

Low / CVSS Base Score : 2.6
(CVSS2#AV:N/AC:H/Au:N/C:P/I:N/A:N)

Family: Gentoo Local Security Checks

Nessus Plugin ID: 21096 (gentoo_GLSA-200603-15.nasl)

Bugtraq ID:

CVE ID: CVE-2006-0898