Test ID:	1.3.6.1.4.1.25623.1.0.880802
Category:	CentOS Local Security Checks
Title:	CentOS Update for openssh CESA-2009:1287 centos5 i386
Summary:	The remote host is missing an update for the 'openssh'; package(s) announced via the referenced advisory.
Description:	Summary: The remote host is missing an update for the 'openssh' package(s) announced via the referenced advisory. Vulnerability Insight: OpenSSH is OpenBSD's SSH (Secure Shell) protocol implementation. These packages include the core files necessary for both the OpenSSH client and server. 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) This update also fixes the following bug: * the ssh client hung when trying to close a session in which a background process still held tty file descriptors open. With this update, this so-called 'hang on exit' error no longer occurs and the ssh client closes the session immediately. (BZ#454812) In addition, this update adds the following enhancements: * the SFTP server can now chroot users to various directories, including a user's home directory, after log in. A new configuration option -- ChrootDirectory -- has been added to '/etc/ssh/sshd_config' for setting this up (the default is not to chroot users). Details regarding configuring this new option are in the sshd_config(5) manual page. (BZ#440240) * the executables which are part of the OpenSSH FIPS module which is being validated will check their integrity and report their FIPS mode status to the system log or to the terminal. (BZ#467268, BZ#492363) 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. Affected Software/OS: openssh on CentOS 5 Solution: Please install the updated packages. CVSS Score: 2.6 CVSS Vector: AV:N/AC:H/Au:N/C:P/I:N/A:N
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2008-5161 http://lists.apple.com/archives/security-announce/2009/Nov/msg00000.html BugTraq ID: 32319 http://www.securityfocus.com/bid/32319 Bugtraq: 20081121 OpenSSH security advisory: cbc.adv (Google Search) http://www.securityfocus.com/archive/1/498558/100/0/threaded Bugtraq: 20081123 Revised: OpenSSH security advisory: cbc.adv (Google Search) http://www.securityfocus.com/archive/1/498579/100/0/threaded CERT/CC vulnerability note: VU#958563 http://www.kb.cert.org/vuls/id/958563 HPdes Security Advisory: HPSBMA02447 http://marc.info/?l=bugtraq&m=125017764422557&w=2 HPdes Security Advisory: SSRT090062 http://isc.sans.org/diary.html?storyid=5366 http://support.avaya.com/elmodocs2/security/ASA-2008-503.htm http://www.cpni.gov.uk/Docs/Vulnerability_Advisory_SSH.txt http://osvdb.org/49872 http://osvdb.org/50035 http://osvdb.org/50036 https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11279 RedHat Security Advisories: RHSA-2009:1287 http://rhn.redhat.com/errata/RHSA-2009-1287.html http://www.securitytracker.com/id?1021235 http://www.securitytracker.com/id?1021236 http://www.securitytracker.com/id?1021382 http://secunia.com/advisories/32740 http://secunia.com/advisories/32760 http://secunia.com/advisories/32833 http://secunia.com/advisories/33121 http://secunia.com/advisories/33308 http://secunia.com/advisories/34857 http://secunia.com/advisories/36558 http://sunsolve.sun.com/search/document.do?assetkey=1-66-247186-1 http://www.vupen.com/english/advisories/2008/3172 http://www.vupen.com/english/advisories/2008/3173 http://www.vupen.com/english/advisories/2008/3409 http://www.vupen.com/english/advisories/2009/1135 http://www.vupen.com/english/advisories/2009/3184 XForce ISS Database: openssh-sshtectia-cbc-info-disclosure(46620) https://exchange.xforce.ibmcloud.com/vulnerabilities/46620
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