Moderate: openssh security update

Advisory:	RHSA-2009:1470-1
Type:	Security Advisory
Severity:	Moderate
Issued on:	2009-09-30
Last updated on:	2009-09-30
Affected Products:	Red Hat Enterprise Linux (v. 5 server) Red Hat Enterprise Linux Desktop (v. 5 client) Red Hat Enterprise Linux EUS (v. 5.4.z server)
OVAL:	com.redhat.rhsa-20091470.xml
CVEs (cve.mitre.org):	CVE-2009-2904

Details

Updated openssh packages that fix a security issue are now available for
Red Hat Enterprise Linux 5.

This update has been rated as having moderate security impact by the Red
Hat Security Response Team.

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.

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
http://kbase.redhat.com/faq/docs/DOC-11259

Updated packages

Red Hat Enterprise Linux (v. 5 server)

SRPMS:
openssh-4.3p2-36.el5_4.2.src.rpm	`ff14a4ab0ae5ad7ffdddef280c323d88`

IA-32:
openssh-4.3p2-36.el5_4.2.i386.rpm	`c4f9f9a8850bba515c94e07c90e0a6b6`
openssh-askpass-4.3p2-36.el5_4.2.i386.rpm	`cadce6d50d8243e6e9e984ab0e25e970`
openssh-clients-4.3p2-36.el5_4.2.i386.rpm	`5e852bbb05c7a5c3c3384666401b9f75`
openssh-server-4.3p2-36.el5_4.2.i386.rpm	`3f8dbf62305e07513bb5e303faf30930`

IA-64:
openssh-4.3p2-36.el5_4.2.ia64.rpm	`db1b730c842bffa66d225391e0a3a288`
openssh-askpass-4.3p2-36.el5_4.2.ia64.rpm	`ed2d15b5c5c2585bb1c55255887fb505`
openssh-clients-4.3p2-36.el5_4.2.ia64.rpm	`f38174b2adf224273550d29911c3e311`
openssh-server-4.3p2-36.el5_4.2.ia64.rpm	`aa6a156e4c1f1a203043961ff2fdf588`

PPC:
openssh-4.3p2-36.el5_4.2.ppc.rpm	`1b0ad6a5b4084db5611fa59997adace1`
openssh-askpass-4.3p2-36.el5_4.2.ppc.rpm	`849d9d34593e64607d8828b3d94512b8`
openssh-clients-4.3p2-36.el5_4.2.ppc.rpm	`55ec7577db379a69d18ee6f2dd6aac0c`
openssh-server-4.3p2-36.el5_4.2.ppc.rpm	`9bbb25b2625e7cc69d127e4d67fcd0b8`

s390x:
openssh-4.3p2-36.el5_4.2.s390x.rpm	`911fe40f6bbf61ea91c134ad69311ceb`
openssh-askpass-4.3p2-36.el5_4.2.s390x.rpm	`fc21e3d50ae36de48e6c9075eecc62f9`
openssh-clients-4.3p2-36.el5_4.2.s390x.rpm	`17ab5e824eac23f811b1ab1a8e8a4283`
openssh-server-4.3p2-36.el5_4.2.s390x.rpm	`ba6b3eacacee3cbe54d5eec9e39115e2`

x86_64:
openssh-4.3p2-36.el5_4.2.x86_64.rpm	`a5c6d4af3030d48c88a02418cbfa81b9`
openssh-askpass-4.3p2-36.el5_4.2.x86_64.rpm	`0b56f6c35f610c4105d030ef424b6f33`
openssh-clients-4.3p2-36.el5_4.2.x86_64.rpm	`8ef442b49c8228ca38bc53ad8cc35b05`
openssh-server-4.3p2-36.el5_4.2.x86_64.rpm	`0a3ed69d32a387b07b549925e1f50601`

Red Hat Enterprise Linux Desktop (v. 5 client)

SRPMS:
openssh-4.3p2-36.el5_4.2.src.rpm	`ff14a4ab0ae5ad7ffdddef280c323d88`

IA-32:
openssh-4.3p2-36.el5_4.2.i386.rpm	`c4f9f9a8850bba515c94e07c90e0a6b6`
openssh-askpass-4.3p2-36.el5_4.2.i386.rpm	`cadce6d50d8243e6e9e984ab0e25e970`
openssh-clients-4.3p2-36.el5_4.2.i386.rpm	`5e852bbb05c7a5c3c3384666401b9f75`
openssh-server-4.3p2-36.el5_4.2.i386.rpm	`3f8dbf62305e07513bb5e303faf30930`

x86_64:
openssh-4.3p2-36.el5_4.2.x86_64.rpm	`a5c6d4af3030d48c88a02418cbfa81b9`
openssh-askpass-4.3p2-36.el5_4.2.x86_64.rpm	`0b56f6c35f610c4105d030ef424b6f33`
openssh-clients-4.3p2-36.el5_4.2.x86_64.rpm	`8ef442b49c8228ca38bc53ad8cc35b05`
openssh-server-4.3p2-36.el5_4.2.x86_64.rpm	`0a3ed69d32a387b07b549925e1f50601`

Red Hat Enterprise Linux EUS (v. 5.4.z server)

SRPMS:
openssh-4.3p2-36.el5_4.2.src.rpm	`ff14a4ab0ae5ad7ffdddef280c323d88`

IA-32:
openssh-4.3p2-36.el5_4.2.i386.rpm	`c4f9f9a8850bba515c94e07c90e0a6b6`
openssh-askpass-4.3p2-36.el5_4.2.i386.rpm	`cadce6d50d8243e6e9e984ab0e25e970`
openssh-clients-4.3p2-36.el5_4.2.i386.rpm	`5e852bbb05c7a5c3c3384666401b9f75`
openssh-server-4.3p2-36.el5_4.2.i386.rpm	`3f8dbf62305e07513bb5e303faf30930`

IA-64:
openssh-4.3p2-36.el5_4.2.ia64.rpm	`db1b730c842bffa66d225391e0a3a288`
openssh-askpass-4.3p2-36.el5_4.2.ia64.rpm	`ed2d15b5c5c2585bb1c55255887fb505`
openssh-clients-4.3p2-36.el5_4.2.ia64.rpm	`f38174b2adf224273550d29911c3e311`
openssh-server-4.3p2-36.el5_4.2.ia64.rpm	`aa6a156e4c1f1a203043961ff2fdf588`

PPC:
openssh-4.3p2-36.el5_4.2.ppc.rpm	`1b0ad6a5b4084db5611fa59997adace1`
openssh-askpass-4.3p2-36.el5_4.2.ppc.rpm	`849d9d34593e64607d8828b3d94512b8`
openssh-clients-4.3p2-36.el5_4.2.ppc.rpm	`55ec7577db379a69d18ee6f2dd6aac0c`
openssh-server-4.3p2-36.el5_4.2.ppc.rpm	`9bbb25b2625e7cc69d127e4d67fcd0b8`

s390x:
openssh-4.3p2-36.el5_4.2.s390x.rpm	`911fe40f6bbf61ea91c134ad69311ceb`
openssh-askpass-4.3p2-36.el5_4.2.s390x.rpm	`fc21e3d50ae36de48e6c9075eecc62f9`
openssh-clients-4.3p2-36.el5_4.2.s390x.rpm	`17ab5e824eac23f811b1ab1a8e8a4283`
openssh-server-4.3p2-36.el5_4.2.s390x.rpm	`ba6b3eacacee3cbe54d5eec9e39115e2`

x86_64:
openssh-4.3p2-36.el5_4.2.x86_64.rpm	`a5c6d4af3030d48c88a02418cbfa81b9`
openssh-askpass-4.3p2-36.el5_4.2.x86_64.rpm	`0b56f6c35f610c4105d030ef424b6f33`
openssh-clients-4.3p2-36.el5_4.2.x86_64.rpm	`8ef442b49c8228ca38bc53ad8cc35b05`
openssh-server-4.3p2-36.el5_4.2.x86_64.rpm	`0a3ed69d32a387b07b549925e1f50601`

(The unlinked packages above are only available from the Red Hat Network)

Bugs fixed (see bugzilla for more information)

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

References

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-2904
http://www.redhat.com/security/updates/classification/#moderate

These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from:
https://www.redhat.com/security/team/key/#package

The Red Hat security contact is secalert@redhat.com. More contact details at http://www.redhat.com/security/team/contact/