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red hat
Calendar Grey September 30, 2009
Dist Redhat Esm H88
Critical patch applied for OpenSSH in CentOS addresses security loopholes and access control vulnerabilities.
Updated openssh packages that fix a security issue are now available for Red Hat Enterprise Linux 5

Solution

Before applying this update, make sure that all previously-released errata relevant to your system have been applied.

This update is available via Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at

Summary

OpenSSH is OpenBSD's SSH (Secure Shell) protocol implementation. These packages include the core files necessary for both the OpenSSH client and server.
A Red Hat specific patch used in the openssh packages as shipped in Red Hat Enterprise Linux 5.4 (RHSA-2009:1287) loosened certain ownership requirements for directories used as arguments for the ChrootDirectory configuration options. A malicious user that also has or previously had non-chroot shell access to a system could possibly use this flaw to escalate their privileges and run commands as any system user. (CVE-2009-2904)
All OpenSSH users are advised to upgrade to these updated packages, which contain a backported patch to resolve this issue. After installing this update, the OpenSSH server daemon (sshd) will be restarted automatically.

Topics%20covered

Topics Covered

security advisory moderate update red hat privilege escalation security patch openssh

References

https://www.cve.org/CVERecord?id=CVE-2009-2904 https://access.redhat.com/security/updates/classification#moderate

Package List

Red Hat Enterprise Linux Desktop (v. 5 client):
Source:
i386: openssh-4.3p2-36.el5_4.2.i386.rpm openssh-askpass-4.3p2-36.el5_4.2.i386.rpm openssh-clients-4.3p2-36.el5_4.2.i386.rpm openssh-debuginfo-4.3p2-36.el5_4.2.i386.rpm openssh-server-4.3p2-36.el5_4.2.i386.rpm
x86_64: openssh-4.3p2-36.el5_4.2.x86_64.rpm openssh-askpass-4.3p2-36.el5_4.2.x86_64.rpm openssh-clients-4.3p2-36.el5_4.2.x86_64.rpm openssh-debuginfo-4.3p2-36.el5_4.2.x86_64.rpm openssh-server-4.3p2-36.el5_4.2.x86_64.rpm
Red Hat Enterprise Linux (v. 5 server):
Source:
i386: openssh-4.3p2-36.el5_4.2.i386.rpm openssh-askpass-4.3p2-36.el5_4.2.i386.rpm openssh-clients-4.3p2-36.el5_4.2.i386.rpm openssh-debuginfo-4.3p2-36.el5_4.2.i386.rpm openssh-server-4.3p2-36.el5_4.2.i386.rpm
ia64: openssh-4.3p2-36.el5_4.2.ia64.rpm openssh-askpass-4.3p2-36.el5_4.2.ia64.rpm openssh-clients-4.3p2-36.el5_4.2.ia64.rpm openssh-debuginfo-4.3p2-36.el5_4.2.ia64.rpm openssh-server-4.3p2-36.el5_4.2.ia64.rpm
ppc: openssh-4.3p2-36.el5_4.2.ppc.rpm openssh-askpass-4.3p2-36.el5_4.2.ppc.rpm openssh-clients-4.3p2-36.el5_4.2.ppc.rpm openssh-debuginfo-4.3p2-36.el5_4.2.ppc.rpm openssh-server-4.3p2-36.el5_4.2.ppc.rpm
s390x: openssh-4.3p2-36.el5_4.2.s390x.rpm openssh-askpass-4.3p2-36.el5_4.2.s390x.rpm openssh-clients-4.3p2-36.el5_4.2.s390x.rpm

Read the Full Advisory


Advisory ID: RHSA-2009:1470-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2009:1470.html
Issue date: 2009-09-30

Topic

Updated openssh packages that fix a security issue are now available forRed Hat Enterprise Linux 5.This update has been rated as having moderate security impact by the RedHat Security Response Team.

Topics%20covered

Topics Covered

security advisory moderate update red hat privilege escalation security patch openssh

Relevant Releases Architectures

Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64

Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64

Bugs Fixed

522141 - CVE-2009-2904 openssh: possible privilege escalation when using ChrootDirectory setting

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