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

low Nessus Plugin ID 21096

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.

Solution

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

See Also

https://security.gentoo.org/glsa/200603-15

Plugin Details

Severity: Low

ID: 21096

File Name: gentoo_GLSA-200603-15.nasl

Version: 1.14

Type: local

Published: 3/18/2006

Updated: 1/6/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.4

CVSS v2

Risk Factor: Low

Base Score: 2.6

Vector: CVSS2#AV:N/AC:H/Au:N/C:P/I:N/A:N

Vulnerability Information

CPE: p-cpe:/a:gentoo:linux:crypt-cbc, cpe:/o:gentoo:linux

Required KB Items: Host/local_checks_enabled, Host/Gentoo/release, Host/Gentoo/qpkg-list

Patch Publication Date: 3/17/2006

Vulnerability Publication Date: 2/23/2006

Reference Information

CVE: CVE-2006-0898

GLSA: 200603-15