Critical: openssh security update

Advisory:	RHSA-2008:0855-6
Type:	Security Advisory
Severity:	Critical
Issued on:	2008-08-22
Last updated on:	2008-08-22
Affected Products:	Red Hat Desktop (v. 4) Red Hat Enterprise Linux (v. 5 server) Red Hat Enterprise Linux AS (v. 4) Red Hat Enterprise Linux AS (v. 4.5.z) Red Hat Enterprise Linux Desktop (v. 5 client) Red Hat Enterprise Linux ES (v. 4) Red Hat Enterprise Linux ES (v. 4.5.z) Red Hat Enterprise Linux WS (v. 4)
OVAL:	com.redhat.rhsa-20080855.xml
CVEs (cve.mitre.org):	CVE-2007-4752 CVE-2008-3844

Details

Updated openssh packages are now available for Red Hat Enterprise Linux 4,
Red Hat Enterprise Linux 5, and Red Hat Enterprise Linux 4.5 Extended
Update Support.

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

OpenSSH is OpenBSD's SSH (Secure SHell) protocol implementation.

Last week Red Hat detected an intrusion on certain of its computer systems
and took immediate action. While the investigation into the intrusion is
on-going, our initial focus was to review and test the distribution
channel we use with our customers, Red Hat Network (RHN) and its associated
security measures. Based on these efforts, we remain highly confident that
our systems and processes prevented the intrusion from compromising RHN or
the content distributed via RHN and accordingly believe that customers who
keep their systems updated using Red Hat Network are not at risk. We are
issuing this alert primarily for those who may obtain Red Hat binary
packages via channels other than those of official Red Hat subscribers.

In connection with the incident, the intruder was able to sign a small
number of OpenSSH packages relating only to Red Hat Enterprise Linux 4
(i386 and x86_64 architectures only) and Red Hat Enterprise Linux 5 (x86_64
architecture only). As a precautionary measure, we are releasing an
updated version of these packages, and have published a list of the
tampered packages and how to detect them at
http://www.redhat.com/security/data/openssh-blacklist.html

To reiterate, our processes and efforts to date indicate that packages
obtained by Red Hat Enterprise Linux subscribers via Red Hat Network are
not at risk.

These packages also fix a low severity flaw in the way ssh handles X11
cookies when creating X11 forwarding connections. When ssh was unable to
create untrusted cookie, ssh used a trusted cookie instead, possibly
allowing the administrative user of a untrusted remote server, or untrusted
application run on the remote server, to gain unintended access to a users
local X server. (CVE-2007-4752)

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/FAQ_58_10188

Updated packages

Red Hat Desktop (v. 4)

SRPMS:
openssh-3.9p1-11.el4_7.src.rpm	`f304fb1e487ff288c58c8ba145522260`

IA-32:
openssh-3.9p1-11.el4_7.i386.rpm	`a3745b401b8bf799995f538664dc5410`
openssh-askpass-3.9p1-11.el4_7.i386.rpm	`46a57c34b0622b707d43b7a6f6c7f78f`
openssh-askpass-gnome-3.9p1-11.el4_7.i386.rpm	`2388390ef6e6de4cbd81a80b2113f83f`
openssh-clients-3.9p1-11.el4_7.i386.rpm	`8a9be029b461791fa76ad5579b3a16a4`
openssh-server-3.9p1-11.el4_7.i386.rpm	`e56217ce16770762e3fa21774c1de76b`

x86_64:
openssh-3.9p1-11.el4_7.x86_64.rpm	`8b1ad8f4b1fe14374a21125d611764cc`
openssh-askpass-3.9p1-11.el4_7.x86_64.rpm	`622b19c35678698a9603a97fd086d949`
openssh-askpass-gnome-3.9p1-11.el4_7.x86_64.rpm	`1968d276a2d706815823836e68255ecf`
openssh-clients-3.9p1-11.el4_7.x86_64.rpm	`daed1dac216199e66bf9931efe238775`
openssh-server-3.9p1-11.el4_7.x86_64.rpm	`d4075dbe534d6ec4c5deb56d26e83cf9`

Red Hat Enterprise Linux (v. 5 server)

SRPMS:
openssh-4.3p2-26.el5_2.1.src.rpm	`61827881d43a6f3a5072de9638a7e4f8`

IA-32:
openssh-4.3p2-26.el5_2.1.i386.rpm	`85a5393d6aea46770d5c98f52df57f1b`
openssh-askpass-4.3p2-26.el5_2.1.i386.rpm	`8fdb0b9008283a439936a59841033bdf`
openssh-clients-4.3p2-26.el5_2.1.i386.rpm	`5dd2e639064a40c20d274325f074c68d`
openssh-server-4.3p2-26.el5_2.1.i386.rpm	`851e2daf6d1e05d55a9128ecb7669b8a`

IA-64:
openssh-4.3p2-26.el5_2.1.ia64.rpm	`39e09ad473f5b9d33d63434382d7fd11`
openssh-askpass-4.3p2-26.el5_2.1.ia64.rpm	`ba23caf23586057b159f684b9a840d46`
openssh-clients-4.3p2-26.el5_2.1.ia64.rpm	`e36e7cf756150d87e5dae6529139f708`
openssh-server-4.3p2-26.el5_2.1.ia64.rpm	`e1465beb1ff34f83ef4363785ae6fa8e`

PPC:
openssh-4.3p2-26.el5_2.1.ppc.rpm	`74addaaa7e16369fbca0755751c8f8ec`
openssh-askpass-4.3p2-26.el5_2.1.ppc.rpm	`d98649e557f30b7a0ab8068707144606`
openssh-clients-4.3p2-26.el5_2.1.ppc.rpm	`7a0990ce21eed0ef39d25dea1a74a23a`
openssh-server-4.3p2-26.el5_2.1.ppc.rpm	`84d4187f9465ab3a0fb7953b15b356e5`

s390x:
openssh-4.3p2-26.el5_2.1.s390x.rpm	`12b68257fc37784e744591d064d5c719`
openssh-askpass-4.3p2-26.el5_2.1.s390x.rpm	`2278ac4619fe16785d2e6427efb34d87`
openssh-clients-4.3p2-26.el5_2.1.s390x.rpm	`41e1b8e3256fa8e172d78f1be169926a`
openssh-server-4.3p2-26.el5_2.1.s390x.rpm	`d8a848791761b53803476c92f24aa96e`

x86_64:
openssh-4.3p2-26.el5_2.1.x86_64.rpm	`3ceed19221eb1ed06197567b59671777`
openssh-askpass-4.3p2-26.el5_2.1.x86_64.rpm	`1339ea81c34ef44df71415777ed22007`
openssh-clients-4.3p2-26.el5_2.1.x86_64.rpm	`3fb6de8242dc79caa64bcf086fa853df`
openssh-server-4.3p2-26.el5_2.1.x86_64.rpm	`b9492b17ea51e6a5faab054aa755e4a1`

Red Hat Enterprise Linux AS (v. 4)

SRPMS:
openssh-3.9p1-11.el4_7.src.rpm	`f304fb1e487ff288c58c8ba145522260`

IA-32:
openssh-3.9p1-11.el4_7.i386.rpm	`a3745b401b8bf799995f538664dc5410`
openssh-askpass-3.9p1-11.el4_7.i386.rpm	`46a57c34b0622b707d43b7a6f6c7f78f`
openssh-askpass-gnome-3.9p1-11.el4_7.i386.rpm	`2388390ef6e6de4cbd81a80b2113f83f`
openssh-clients-3.9p1-11.el4_7.i386.rpm	`8a9be029b461791fa76ad5579b3a16a4`
openssh-server-3.9p1-11.el4_7.i386.rpm	`e56217ce16770762e3fa21774c1de76b`

IA-64:
openssh-3.9p1-11.el4_7.ia64.rpm	`bfadc08c479f7e3a472fc231de99f875`
openssh-askpass-3.9p1-11.el4_7.ia64.rpm	`323b31dee9d7c3ed817849217e9230a2`
openssh-askpass-gnome-3.9p1-11.el4_7.ia64.rpm	`8abf2ebb5cfc2077573664fda4878a07`
openssh-clients-3.9p1-11.el4_7.ia64.rpm	`24d2df09a5c3424393e2f60d0dab21f7`
openssh-server-3.9p1-11.el4_7.ia64.rpm	`be71a22f9998075e52f807ac52b526ea`

PPC:
openssh-3.9p1-11.el4_7.ppc.rpm	`c2ff5d24d3f0a47874469234ca517ab9`
openssh-askpass-3.9p1-11.el4_7.ppc.rpm	`0ff871ce740ddb80cdf306b6a851ae1a`
openssh-askpass-gnome-3.9p1-11.el4_7.ppc.rpm	`9934ea584f4f971d97af25a570e871e8`
openssh-clients-3.9p1-11.el4_7.ppc.rpm	`2478925b2528f7db51d4647cb520632e`
openssh-server-3.9p1-11.el4_7.ppc.rpm	`bb302cc799a56ec1775dd090791f6f4b`

s390:
openssh-3.9p1-11.el4_7.s390.rpm	`4e816787e1de1205f892b4326c0765d0`
openssh-askpass-3.9p1-11.el4_7.s390.rpm	`bbdb4b69a87f767667b4c70786de6c1a`
openssh-askpass-gnome-3.9p1-11.el4_7.s390.rpm	`e8e413497ca2220c9187aef1fda652b7`
openssh-clients-3.9p1-11.el4_7.s390.rpm	`01ff12db9ec3bc8106d988780ac1c481`
openssh-server-3.9p1-11.el4_7.s390.rpm	`f1e82aa9a506fbc4cb3562babf765dc3`

s390x:
openssh-3.9p1-11.el4_7.s390x.rpm	`5d5cefb247474d391925413276ff7adb`
openssh-askpass-3.9p1-11.el4_7.s390x.rpm	`01bc38e43b7b8a989ede5b66f91a6c21`
openssh-askpass-gnome-3.9p1-11.el4_7.s390x.rpm	`125027a839c387328d5fa982529852e7`
openssh-clients-3.9p1-11.el4_7.s390x.rpm	`0676d2fe02d8c944e76b9485f36d9c8a`
openssh-server-3.9p1-11.el4_7.s390x.rpm	`4033374e14e64e2c0a1e79bb9e25c746`

x86_64:
openssh-3.9p1-11.el4_7.x86_64.rpm	`8b1ad8f4b1fe14374a21125d611764cc`
openssh-askpass-3.9p1-11.el4_7.x86_64.rpm	`622b19c35678698a9603a97fd086d949`
openssh-askpass-gnome-3.9p1-11.el4_7.x86_64.rpm	`1968d276a2d706815823836e68255ecf`
openssh-clients-3.9p1-11.el4_7.x86_64.rpm	`daed1dac216199e66bf9931efe238775`
openssh-server-3.9p1-11.el4_7.x86_64.rpm	`d4075dbe534d6ec4c5deb56d26e83cf9`

Red Hat Enterprise Linux AS (v. 4.5.z)

SRPMS:
openssh-3.9p1-10.RHEL4.20.src.rpm	`90acbb4ac1d221875b245bd510710a8f`

IA-32:
openssh-3.9p1-10.RHEL4.20.i386.rpm	`8771c57236923ab78aee06b170522e79`
openssh-askpass-3.9p1-10.RHEL4.20.i386.rpm	`c4adbf61762339ed707a616e37d93a18`
openssh-askpass-gnome-3.9p1-10.RHEL4.20.i386.rpm	`12bcdfa97bbadf66ce0c68f113cb14f3`
openssh-clients-3.9p1-10.RHEL4.20.i386.rpm	`bbb7aeee28e71eba8482a991fcb78c22`
openssh-server-3.9p1-10.RHEL4.20.i386.rpm	`9ccea50d8435a15c4ed2c1a67f51ddaf`

IA-64:
openssh-3.9p1-10.RHEL4.20.ia64.rpm	`95ca17a63ef3cf223ca8eb8295b2a784`
openssh-askpass-3.9p1-10.RHEL4.20.ia64.rpm	`61c94dc386402c614a9823f1a8c02894`
openssh-askpass-gnome-3.9p1-10.RHEL4.20.ia64.rpm	`4c558d84fc7f2fa2ba693c732065cf34`
openssh-clients-3.9p1-10.RHEL4.20.ia64.rpm	`ee989f269ae87cb4db5ac05415764e9c`
openssh-server-3.9p1-10.RHEL4.20.ia64.rpm	`1b4bc6923f83acd35a397f07c7818ad6`

PPC:
openssh-3.9p1-10.RHEL4.20.ppc.rpm	`71f729243c0a45fae9f66480a3e06420`
openssh-askpass-3.9p1-10.RHEL4.20.ppc.rpm	`ffd789ef66be0099d0cf4ff6f52f1fd4`
openssh-askpass-gnome-3.9p1-10.RHEL4.20.ppc.rpm	`136d25e3fe14fb12d7bdb821bb5a9585`
openssh-clients-3.9p1-10.RHEL4.20.ppc.rpm	`44dd13d17e3fa9a1c430f112ca2fe9c2`
openssh-server-3.9p1-10.RHEL4.20.ppc.rpm	`a18f6dbc4749cdb466df3ba520bd49d0`

s390:
openssh-3.9p1-10.RHEL4.20.s390.rpm	`bc14021c30b34afa79ca917328ebc2c2`
openssh-askpass-3.9p1-10.RHEL4.20.s390.rpm	`5b6227309870e84f6158c9adc398c254`
openssh-askpass-gnome-3.9p1-10.RHEL4.20.s390.rpm	`404f2b49892af3456627fbf6ba551d76`
openssh-clients-3.9p1-10.RHEL4.20.s390.rpm	`4d3887bf38b1017f534ac0405716d72e`
openssh-server-3.9p1-10.RHEL4.20.s390.rpm	`3ba159171cf28bbb273def9671d5bfa8`

s390x:
openssh-3.9p1-10.RHEL4.20.s390x.rpm	`1ba5feb359ff0e2ffcabdc925275c4ce`
openssh-askpass-3.9p1-10.RHEL4.20.s390x.rpm	`6e81efea41e82890b4a5793b251fb29b`
openssh-askpass-gnome-3.9p1-10.RHEL4.20.s390x.rpm	`78ed6cef54cf40883db0b900751b39f8`
openssh-clients-3.9p1-10.RHEL4.20.s390x.rpm	`5d2ff3ae9a36c38d7a2c98f1b259b354`
openssh-server-3.9p1-10.RHEL4.20.s390x.rpm	`22a4cf17358c27b17027a59f1ceb3a3c`

x86_64:
openssh-3.9p1-10.RHEL4.20.x86_64.rpm	`a6d33ef928776fd968316e1a261973de`
openssh-askpass-3.9p1-10.RHEL4.20.x86_64.rpm	`cbe186f0649e041cf59ad756961839fc`
openssh-askpass-gnome-3.9p1-10.RHEL4.20.x86_64.rpm	`f6de144683ac37b755ae3c71993cd517`
openssh-clients-3.9p1-10.RHEL4.20.x86_64.rpm	`7daa859c029ea67a8126cda891e1ef12`
openssh-server-3.9p1-10.RHEL4.20.x86_64.rpm	`4a6e73d35d94d59918daee95f4076bc9`

Red Hat Enterprise Linux Desktop (v. 5 client)

SRPMS:
openssh-4.3p2-26.el5_2.1.src.rpm	`61827881d43a6f3a5072de9638a7e4f8`

IA-32:
openssh-4.3p2-26.el5_2.1.i386.rpm	`85a5393d6aea46770d5c98f52df57f1b`
openssh-askpass-4.3p2-26.el5_2.1.i386.rpm	`8fdb0b9008283a439936a59841033bdf`
openssh-clients-4.3p2-26.el5_2.1.i386.rpm	`5dd2e639064a40c20d274325f074c68d`
openssh-server-4.3p2-26.el5_2.1.i386.rpm	`851e2daf6d1e05d55a9128ecb7669b8a`

x86_64:
openssh-4.3p2-26.el5_2.1.x86_64.rpm	`3ceed19221eb1ed06197567b59671777`
openssh-askpass-4.3p2-26.el5_2.1.x86_64.rpm	`1339ea81c34ef44df71415777ed22007`
openssh-clients-4.3p2-26.el5_2.1.x86_64.rpm	`3fb6de8242dc79caa64bcf086fa853df`
openssh-server-4.3p2-26.el5_2.1.x86_64.rpm	`b9492b17ea51e6a5faab054aa755e4a1`

Red Hat Enterprise Linux ES (v. 4)

SRPMS:
openssh-3.9p1-11.el4_7.src.rpm	`f304fb1e487ff288c58c8ba145522260`

IA-32:
openssh-3.9p1-11.el4_7.i386.rpm	`a3745b401b8bf799995f538664dc5410`
openssh-askpass-3.9p1-11.el4_7.i386.rpm	`46a57c34b0622b707d43b7a6f6c7f78f`
openssh-askpass-gnome-3.9p1-11.el4_7.i386.rpm	`2388390ef6e6de4cbd81a80b2113f83f`
openssh-clients-3.9p1-11.el4_7.i386.rpm	`8a9be029b461791fa76ad5579b3a16a4`
openssh-server-3.9p1-11.el4_7.i386.rpm	`e56217ce16770762e3fa21774c1de76b`

IA-64:
openssh-3.9p1-11.el4_7.ia64.rpm	`bfadc08c479f7e3a472fc231de99f875`
openssh-askpass-3.9p1-11.el4_7.ia64.rpm	`323b31dee9d7c3ed817849217e9230a2`
openssh-askpass-gnome-3.9p1-11.el4_7.ia64.rpm	`8abf2ebb5cfc2077573664fda4878a07`
openssh-clients-3.9p1-11.el4_7.ia64.rpm	`24d2df09a5c3424393e2f60d0dab21f7`
openssh-server-3.9p1-11.el4_7.ia64.rpm	`be71a22f9998075e52f807ac52b526ea`

x86_64:
openssh-3.9p1-11.el4_7.x86_64.rpm	`8b1ad8f4b1fe14374a21125d611764cc`
openssh-askpass-3.9p1-11.el4_7.x86_64.rpm	`622b19c35678698a9603a97fd086d949`
openssh-askpass-gnome-3.9p1-11.el4_7.x86_64.rpm	`1968d276a2d706815823836e68255ecf`
openssh-clients-3.9p1-11.el4_7.x86_64.rpm	`daed1dac216199e66bf9931efe238775`
openssh-server-3.9p1-11.el4_7.x86_64.rpm	`d4075dbe534d6ec4c5deb56d26e83cf9`

Red Hat Enterprise Linux ES (v. 4.5.z)

SRPMS:
openssh-3.9p1-10.RHEL4.20.src.rpm	`90acbb4ac1d221875b245bd510710a8f`

IA-32:
openssh-3.9p1-10.RHEL4.20.i386.rpm	`8771c57236923ab78aee06b170522e79`
openssh-askpass-3.9p1-10.RHEL4.20.i386.rpm	`c4adbf61762339ed707a616e37d93a18`
openssh-askpass-gnome-3.9p1-10.RHEL4.20.i386.rpm	`12bcdfa97bbadf66ce0c68f113cb14f3`
openssh-clients-3.9p1-10.RHEL4.20.i386.rpm	`bbb7aeee28e71eba8482a991fcb78c22`
openssh-server-3.9p1-10.RHEL4.20.i386.rpm	`9ccea50d8435a15c4ed2c1a67f51ddaf`

IA-64:
openssh-3.9p1-10.RHEL4.20.ia64.rpm	`95ca17a63ef3cf223ca8eb8295b2a784`
openssh-askpass-3.9p1-10.RHEL4.20.ia64.rpm	`61c94dc386402c614a9823f1a8c02894`
openssh-askpass-gnome-3.9p1-10.RHEL4.20.ia64.rpm	`4c558d84fc7f2fa2ba693c732065cf34`
openssh-clients-3.9p1-10.RHEL4.20.ia64.rpm	`ee989f269ae87cb4db5ac05415764e9c`
openssh-server-3.9p1-10.RHEL4.20.ia64.rpm	`1b4bc6923f83acd35a397f07c7818ad6`

x86_64:
openssh-3.9p1-10.RHEL4.20.x86_64.rpm	`a6d33ef928776fd968316e1a261973de`
openssh-askpass-3.9p1-10.RHEL4.20.x86_64.rpm	`cbe186f0649e041cf59ad756961839fc`
openssh-askpass-gnome-3.9p1-10.RHEL4.20.x86_64.rpm	`f6de144683ac37b755ae3c71993cd517`
openssh-clients-3.9p1-10.RHEL4.20.x86_64.rpm	`7daa859c029ea67a8126cda891e1ef12`
openssh-server-3.9p1-10.RHEL4.20.x86_64.rpm	`4a6e73d35d94d59918daee95f4076bc9`

Red Hat Enterprise Linux WS (v. 4)

SRPMS:
openssh-3.9p1-11.el4_7.src.rpm	`f304fb1e487ff288c58c8ba145522260`

IA-32:
openssh-3.9p1-11.el4_7.i386.rpm	`a3745b401b8bf799995f538664dc5410`
openssh-askpass-3.9p1-11.el4_7.i386.rpm	`46a57c34b0622b707d43b7a6f6c7f78f`
openssh-askpass-gnome-3.9p1-11.el4_7.i386.rpm	`2388390ef6e6de4cbd81a80b2113f83f`
openssh-clients-3.9p1-11.el4_7.i386.rpm	`8a9be029b461791fa76ad5579b3a16a4`
openssh-server-3.9p1-11.el4_7.i386.rpm	`e56217ce16770762e3fa21774c1de76b`

IA-64:
openssh-3.9p1-11.el4_7.ia64.rpm	`bfadc08c479f7e3a472fc231de99f875`
openssh-askpass-3.9p1-11.el4_7.ia64.rpm	`323b31dee9d7c3ed817849217e9230a2`
openssh-askpass-gnome-3.9p1-11.el4_7.ia64.rpm	`8abf2ebb5cfc2077573664fda4878a07`
openssh-clients-3.9p1-11.el4_7.ia64.rpm	`24d2df09a5c3424393e2f60d0dab21f7`
openssh-server-3.9p1-11.el4_7.ia64.rpm	`be71a22f9998075e52f807ac52b526ea`

x86_64:
openssh-3.9p1-11.el4_7.x86_64.rpm	`8b1ad8f4b1fe14374a21125d611764cc`
openssh-askpass-3.9p1-11.el4_7.x86_64.rpm	`622b19c35678698a9603a97fd086d949`
openssh-askpass-gnome-3.9p1-11.el4_7.x86_64.rpm	`1968d276a2d706815823836e68255ecf`
openssh-clients-3.9p1-11.el4_7.x86_64.rpm	`daed1dac216199e66bf9931efe238775`
openssh-server-3.9p1-11.el4_7.x86_64.rpm	`d4075dbe534d6ec4c5deb56d26e83cf9`

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

Bugs fixed (see bugzilla for more information)

280361 - CVE-2007-4752 openssh falls back to the trusted x11 cookie if generation of an untrusted cookie fails

References

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4752
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3844
http://www.redhat.com/security/data/openssh-blacklist.html
http://www.redhat.com/security/updates/classification/#critical

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/