OpenSSL SSL_get_shared_ciphers() off-by-one buffer overflow

openssl-sslgetshared-bo (36837) The risk level is classified as HighHigh Risk

Description:

OpenSSL is vulnerable to an off-by-one buffer overflow, caused by improper bounds checking by the SSL_get_shared_ciphers() function. By sending multiple cipher strings to the last character of the current cipher string, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the server to crash.

*CVSS:

Base Score: 7.5
  Access Vector: Network
  Access Complexity: Low
  Authentication: None
  Confidentiality Impact: Partial
  Integrity Impact: Partial
  Availability Impact: Partial
 
Temporal Score: 5.5
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Gain Access

Remedy:

Upgrade to the latest version of OpenSSL (0.98f or later), available from the OpenSSL Web site. See References.

For IBM HMC 6 Release 1.3:
Apply the Security fix for HMC Version 6 Release 1.3, available from the IBM Subscription service. See References.

For IBM HMC 7 Release 3.2.0:
Apply the Security fix for HMC Version 7 Release 3.2.0, available from the IBM Subscription service. See References.

Refer to VMSA-2008-0001 for patch, upgrade or suggested workaround information, available from the Security-announce Mailing List, Mon Jan 7 17:46:23 PST 2008. See References.

For other distributions:
Apply the appropriate update for your system. See References.

References:

Platforms Affected:

  • Apple Mac OS X 10.4.11
  • Apple Mac OS X 10.5.4
  • Apple Mac OS X Server 10.4.11
  • Apple Mac OS X Server 10.5.4
  • Avaya Application Enablement Services 3.1.2
  • Avaya Application Enablement Services 3.1.3
  • Avaya Application Enablement Services 3.1.4
  • Avaya Communication Manager 2.0
  • Avaya Communication Manager 2.0.1
  • Avaya Communication Manager 2.1
  • Avaya Communication Manager 3.0
  • Avaya Communication Manager 3.1
  • Avaya Converged Communications Server 2.0
  • Avaya Converged Communications Server 2.0.1
  • Avaya Converged Communications Server 2.1
  • Avaya Converged Communications Server 3.0
  • Avaya Converged Communications Server 3.1
  • Avaya Expanded Meet-Me Conferencing 1.017
  • Avaya Expanded Meet-Me Conferencing 1.021
  • Canonical Ubuntu 6.06 LTS
  • Canonical Ubuntu 6.10
  • Canonical Ubuntu 7.04
  • Debian Debian Linux 3.1
  • Debian Debian Linux 4.0
  • FreeBSD FreeBSD
  • Gentoo Linux
  • IBM Hardware Management Console 6.1.3
  • IBM Hardware Management Console 7.3.2.0
  • MandrakeSoft Mandrake Linux 2007
  • MandrakeSoft Mandrake Linux 2007 X86_64
  • MandrakeSoft Mandrake Linux 2007.1
  • MandrakeSoft Mandrake Linux 2007.1 X86_64
  • MandrakeSoft Mandrake Linux 2008.0 X86_64
  • MandrakeSoft Mandrake Linux Corporate Server 3.0
  • MandrakeSoft Mandrake Linux Corporate Server 3.0 X86_64
  • MandrakeSoft Mandrake Linux Corporate Server 4.0 X86_64
  • MandrakeSoft Mandrake Linux Corporate Server 4.0
  • MandrakeSoft Mandrake Multi Network Firewall 2.0
  • OpenBSD OpenBSD prior to 4.2
  • OpenSSL OpenSSL 0.9.7
  • OpenSSL OpenSSL 0.9.7 Beta5
  • OpenSSL OpenSSL 0.9.7 Beta4
  • OpenSSL OpenSSL 0.9.7 Beta3
  • OpenSSL OpenSSL 0.9.7 Beta6
  • OpenSSL OpenSSL 0.9.7 Beta1
  • OpenSSL OpenSSL 0.9.7 Beta2
  • OpenSSL OpenSSL 0.9.7a
  • OpenSSL OpenSSL 0.9.7b
  • OpenSSL OpenSSL 0.9.7c
  • OpenSSL OpenSSL 0.9.7d
  • OpenSSL OpenSSL 0.9.7e
  • OpenSSL OpenSSL 0.9.7f
  • OpenSSL OpenSSL 0.9.7g
  • OpenSSL OpenSSL 0.9.7h
  • OpenSSL OpenSSL 0.9.7i
  • OpenSSL OpenSSL 0.9.7j
  • OpenSSL OpenSSL 0.9.7k
  • OpenSSL OpenSSL 0.9.8
  • OpenSSL OpenSSL 0.9.8a
  • OpenSSL OpenSSL 0.9.8b
  • OpenSSL OpenSSL 0.9.8c
  • OpenSSL OpenSSL 0.9.8d
  • OpenSSL OpenSSL 0.9.8e
  • RedHat Enterprise Linux 2.1 AS
  • RedHat Enterprise Linux 2.1 ES
  • RedHat Enterprise Linux 2.1 WS
  • RedHat Enterprise Linux 3 WS
  • RedHat Enterprise Linux 3 ES
  • RedHat Enterprise Linux 3 AS
  • RedHat Enterprise Linux 3 Desktop
  • RedHat Enterprise Linux 4 AS
  • RedHat Enterprise Linux 4 WS
  • RedHat Enterprise Linux 4 ES
  • RedHat Enterprise Linux 4 Desktop
  • RedHat Enterprise Linux 5 Client Workstation
  • RedHat Enterprise Linux 5
  • RedHat Enterprise Linux 5 Client
  • RedHat Linux Advanced Workstation 2.1 Itanium
  • Sun Solaris 10 SPARC
  • Sun Solaris 10 x86
  • SUSE SuSE Linux
  • Turbolinux Turbolinux 10 Server
  • Turbolinux Turbolinux 10 Server x64 Ed
  • Turbolinux Turbolinux 11 Server
  • Turbolinux Turbolinux 11 Server x64 Ed
  • Turbolinux Turbolinux 8 Server
  • Turbolinux Turbolinux FUJI
  • Turbolinux Turbolinux Multimedia
  • Turbolinux Turbolinux Personal
  • Turbolinux Turbolinux wizpy
  • Turbolinux Turbolinux Appliance Server 1.0 Hosting Ed
  • Turbolinux Turbolinux Appliance Server 1.0 Workgroup Ed
  • Turbolinux Turbolinux Appliance Server 2.0
  • VMware ESX Server 2.5.4
  • VMware ESX Server 2.5.5
  • VMware ESX Server 3.0.1
  • VMware ESX Server 3.0.2
  • VMware ESXi Server 3.5

Reported:

Sep 27, 2007

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