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If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important. If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery.
Vulnerability Assessment Details
Check for the version of the openssh packages
Detailed Explanation for this Vulnerability Assessment
Updated openssh packages that fix a potential security vulnerability and
various other bugs are now available.
This update has been rated as having low security impact by the Red Hat
Security Response Team.
OpenSSH is OpenBSD's SSH (Secure SHell) protocol implementation. This
includes the core files necessary for both the OpenSSH client and server.
A bug was found in the way the OpenSSH server handled the MaxStartups and
LoginGraceTime configuration variables. A malicious user could connect to
the SSH daemon in such a way that it would prevent additional logins from
occuring until the malicious connections are closed. The Common
Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name
CVE-2004-2069 to this issue.
Additionally, the following issues are resolved with this update:
- The -q option of the ssh client did not suppress the banner message sent
by the server, which caused errors when used in scripts.
- The sshd daemon failed to close the client connection if multiple X
clients were forwarded over the connection and the client session exited.
- The sftp client leaked memory if used for extended periods.
- The sshd daemon called the PAM functions incorrectly if the user was
unknown on the system.
All users of openssh should upgrade to these updated packages, which
contain backported patches and resolve these issues.
Solution : http://rhn.redhat.com/errata/RHSA-2005-550.html
Network Security Threat Level: High
Networks Security ID:
Vulnerability Assessment Copyright: This script is Copyright (C) 2005 Tenable Network Security
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