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Test ID:
Category:Red Hat Local Security Checks
Title:RedHat Security Advisory RHSA-2009:1287
The remote host is missing updates announced in
advisory RHSA-2009:1287.

OpenSSH is OpenBSD's SSH (Secure Shell) protocol implementation. These
packages include the core files necessary for both the OpenSSH client and

A flaw was found in the SSH protocol. An attacker able to perform a
man-in-the-middle attack may be able to obtain a portion of plain text from
an arbitrary ciphertext block when a CBC mode cipher was used to encrypt
SSH communication. This update helps mitigate this attack: OpenSSH clients
and servers now prefer CTR mode ciphers to CBC mode, and the OpenSSH server
now reads SSH packets up to their full possible length when corruption is
detected, rather than reporting errors early, reducing the possibility of
successful plain text recovery. (CVE-2008-5161)

All OpenSSH users are advised to upgrade to these updated packages, which
contain backported patches to resolve these issues and add these
enhancements. After installing this update, the OpenSSH server daemon
(sshd) will be restarted automatically.

Please note that this update is available via
Red Hat Network. To use Red Hat Network, launch the Red
Hat Update Agent with the following command: up2date

CVSS Score:

CVSS Vector:

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2008-5161
BugTraq ID: 32319
Bugtraq: 20081121 OpenSSH security advisory: cbc.adv (Google Search)
Bugtraq: 20081123 Revised: OpenSSH security advisory: cbc.adv (Google Search)
CERT/CC vulnerability note: VU#958563
HPdes Security Advisory: HPSBMA02447
HPdes Security Advisory: SSRT090062
RedHat Security Advisories: RHSA-2009:1287
XForce ISS Database: openssh-sshtectia-cbc-info-disclosure(46620)
CopyrightCopyright (c) 2009 E-Soft Inc.

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