Race condition in OpenSSH - CVE-2006-5051

Vulnerability identifier: #VU93515

CSH Severity: Critical

CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2006-5051

CWE-ID: CWE-362

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to a race condition in sshd when GSSAPI authentication is enabled. A remote attacker can send specially crafted requests to the daemon, trigger a race condition and execute arbitrary code on the system.

OpenSSH
IBM i
Anolis OS
Junos OS
Junos OS Evolved
Athonet IMS
Athonet Mobile Core
openssh
openssh-askpass
openssh-clients
openssh-keycat
openssh-server
openssh-sk-dummy
openssh-doc
Citrix Netscaler ADC
NetScaler Console (formerly NetScaler ADM)
Citrix NetScaler Gateway

Install updates from vendor's website.

OpenSSH - update to 4.4p1
Junos OS - addressed in versions 24.2R1-S2, 24.2R2, 24.4R1
Junos OS Evolved - addressed in versions 24.2R1-S2-EVO, 24.2R2-EVO, 24.4R1-EVO
Athonet IMS - update to 1.24.1.1
Athonet Mobile Core - update to 1.24.1.1
openssh - addressed in versions 9.3p2-2, 9.6p1-2
openssh-askpass - addressed in versions 9.3p2-2, 9.6p1-2
openssh-clients - addressed in versions 9.3p2-2, 9.6p1-2
openssh-keycat - addressed in versions 9.3p2-2, 9.6p1-2
openssh-server - addressed in versions 9.3p2-2, 9.6p1-2
openssh-sk-dummy - addressed in versions 9.3p2-2, 9.6p1-2
openssh-doc - addressed in versions 9.3p2-2, 9.6p1-2
Citrix Netscaler ADC - addressed in versions 12.1-55.309, 13.0-92.31, 13.1-37.190, 13.1-53.24, 14.1-25.56
NetScaler Console (formerly NetScaler ADM) - addressed in versions 13.0-92.31, 13.1-53.24, 14.1-25.56
Citrix NetScaler Gateway - update to 14.1-25.56

• ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-06:22.openssh.asc
• http://www.redhat.com/support/errata/RHSA-2006-0698.html
• http://www.redhat.com/support/errata/RHSA-2006-0697.html
• http://slackware.com/security/viewer.php?l=slackware-security&y=2006&m=slackware-security.592566
• http://www.ubuntu.com/usn/usn-355-1
• http://www.securityfocus.com/bid/20241
• http://securitytracker.com/id?1016940
• http://secunia.com/advisories/22158
• http://secunia.com/advisories/22173
• http://secunia.com/advisories/22183
• http://secunia.com/advisories/22196
• http://secunia.com/advisories/22236
• http://lists.freebsd.org/pipermail/freebsd-security/2006-October/004051.html
• http://www.debian.org/security/2006/dsa-1189
• http://security.freebsd.org/advisories/FreeBSD-SA-06%3A22.openssh.asc
• http://www.kb.cert.org/vuls/id/851340
• http://secunia.com/advisories/22270
• http://secunia.com/advisories/22208
• http://secunia.com/advisories/22245
• http://www.arkoon.fr/upload/alertes/36AK-2006-07-FR-1.0_FAST360_OPENSSH.pdf
• http://www.openbsd.org/errata.html#ssh
• http://secunia.com/advisories/22352
• http://support.avaya.com/elmodocs2/security/ASA-2006-216.htm
• http://www.openpkg.org/security/advisories/OpenPKG-SA-2006.022-openssh.html
• http://secunia.com/advisories/22362
• http://www.novell.com/linux/security/advisories/2006_62_openssh.html
• http://secunia.com/advisories/22495
• http://www.arkoon.fr/upload/alertes/43AK-2006-09-FR-1.0_SSL360_OPENSSH.pdf
• ftp://patches.sgi.com/support/free/security/advisories/20061001-01-P.asc
• http://secunia.com/advisories/22487
• http://security.gentoo.org/glsa/glsa-200611-06.xml
• http://secunia.com/advisories/22823
• http://www.debian.org/security/2006/dsa-1212
• http://secunia.com/advisories/22926
• http://www.vmware.com/support/vi3/doc/esx-3069097-patch.html
• http://www.vmware.com/support/vi3/doc/esx-9986131-patch.html
• http://secunia.com/advisories/23680
• http://docs.info.apple.com/article.html?artnum=305214
• http://secunia.com/advisories/24479
• http://www-unix.globus.org/mail_archive/security-announce/2007/04/msg00000.html
• http://secunia.com/advisories/24805
• http://openssh.org/txt/release-4.4
• http://www.osvdb.org/29264
• http://sourceforge.net/forum/forum.php?forum_id=681763
• http://lists.apple.com/archives/security-announce/2007/Mar/msg00002.html
• http://www.mandriva.com/security/advisories?name=MDKSA-2006:179
• http://www.us-cert.gov/cas/techalerts/TA07-072A.html
• http://secunia.com/advisories/24799
• http://www.vupen.com/english/advisories/2007/0930
• http://www.vupen.com/english/advisories/2007/1332
• http://www.vupen.com/english/advisories/2006/4329
• http://www.vupen.com/english/advisories/2006/4018
• http://marc.info/?l=openssh-unix-dev&m=115939141729160&w=2
• https://exchange.xforce.ibmcloud.com/vulnerabilities/29254
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11387

• Remote code execution in OpenSSH
• NetScaler ADC and NetScaler Gateway update for OpenSSH
• NetScaler Console update for OpenSSH
• HPE Athonet products update for OpenSSH
• Junos OS and Junos OS Evolved update for OpenSSH
• Anolis OS update for openssh
• Multiple vulnerabilities in IBM i
• Anolis OS update for openssh