Cisco IOS Multicast Virtual Private Network (MVPN) information disclosure

cisco-ios-mvpm-information-disclosure (41468) The risk level is classified as LowLow Risk

Description:

Cisco IOS could allow a remote attacker to obtain sensitive information, caused by an error when Multicast Virtual Private Network (MVPN) is enabled. By sending a specially-crafted Multicast Distribution Tree (MDT) Data Join message, a remote attacker could cause VPNs that are not connected to the same edge router as the attacker to leak multicast traffic when the BGP peer IP address and the multicast group address of other MPLS VPNs are known.

*CVSS:

Base Score: 2.6
  Access Vector: Network
  Access Complexity: High
  Authentication: None
  Confidentiality Impact: Partial
  Integrity Impact: None
  Availability Impact: None
 
Temporal Score: 1.9
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Obtain Information

Remedy:

Refer to cisco-sa-20080326-mvpn for patch, upgrade or suggested workaround information. See References.

References:

  • cisco-sa-20080326-mvpn: Cisco Security Advisory: Cisco IOS Multicast Virtual Private Network (MVPN) Data Leak.
  • BID-28464: Cisco IOS Multicast Virtual Private Network MDT Data Join Handling Vulnerability
  • CVE-2008-1156: Unspecified vulnerability in the Multicast Virtual Private Network (MVPN) implementation in Cisco IOS 12.0, 12.2, 12.3, and 12.4 allows remote attackers to create extra multicast states on the core routers via a crafted Multicast Distribution Tree (MDT) Data Join message.
  • SA29507: Cisco IOS Multiple Vulnerabilities
  • SECTRACK ID: 1019715: Cisco IOS Multicast Virtual Private Network (MVPN) Data Leak Lets Remote Users Obtain VPN Traffic
  • VUPEN/ADV-2008-1006: Cisco IOS Denial of Service and Information Disclosure Vulnerabilities

Platforms Affected:

  • Cisco IOS 12.0S
  • Cisco IOS 12.0SX
  • Cisco IOS 12.0SY
  • Cisco IOS 12.0SZ
  • Cisco IOS 12.2B
  • Cisco IOS 12.2BC
  • Cisco IOS 12.2BZ
  • Cisco IOS 12.2CX
  • Cisco IOS 12.2CZ
  • Cisco IOS 12.2EU
  • Cisco IOS 12.2EW
  • Cisco IOS 12.2EZ
  • Cisco IOS 12.2FZ
  • Cisco IOS 12.2IXA
  • Cisco IOS 12.2IXB
  • Cisco IOS 12.2IXC
  • Cisco IOS 12.2SBC
  • Cisco IOS 12.2SEA
  • Cisco IOS 12.2SEB
  • Cisco IOS 12.2SEC
  • Cisco IOS 12.2SED
  • Cisco IOS 12.2SO
  • Cisco IOS 12.2SU
  • Cisco IOS 12.2SX
  • Cisco IOS 12.2SXA
  • Cisco IOS 12.2SXB
  • Cisco IOS 12.2SXD
  • Cisco IOS 12.2SXE
  • Cisco IOS 12.2SY
  • Cisco IOS 12.2SZ
  • Cisco IOS 12.2T
  • Cisco IOS 12.2UZ
  • Cisco IOS 12.2YH
  • Cisco IOS 12.2YJ
  • Cisco IOS 12.2YL
  • Cisco IOS 12.2YM
  • Cisco IOS 12.2YN
  • Cisco IOS 12.2YQ
  • Cisco IOS 12.2YR
  • Cisco IOS 12.2YT
  • Cisco IOS 12.2YU
  • Cisco IOS 12.2YV
  • Cisco IOS 12.2YX
  • Cisco IOS 12.2YZ
  • Cisco IOS 12.2ZA
  • Cisco IOS 12.2ZC
  • Cisco IOS 12.2ZD
  • Cisco IOS 12.2ZE
  • Cisco IOS 12.2ZF
  • Cisco IOS 12.2ZG
  • Cisco IOS 12.2ZJ
  • Cisco IOS 12.2ZL
  • Cisco IOS 12.2ZP
  • Cisco IOS 12.2ZU
  • Cisco IOS 12.3B
  • Cisco IOS 12.3BW
  • Cisco IOS 12.3T
  • Cisco IOS 12.3VA
  • Cisco IOS 12.3XB
  • Cisco IOS 12.3XD
  • Cisco IOS 12.3XF
  • Cisco IOS 12.3XG
  • Cisco IOS 12.3XH
  • Cisco IOS 12.3XJ
  • Cisco IOS 12.3XK
  • Cisco IOS 12.3XQ
  • Cisco IOS 12.3XS
  • Cisco IOS 12.3XU
  • Cisco IOS 12.3XW
  • Cisco IOS 12.3XY
  • Cisco IOS 12.3YA
  • Cisco IOS 12.3YD
  • Cisco IOS 12.3YF
  • Cisco IOS 12.3YH
  • Cisco IOS 12.3YI
  • Cisco IOS 12.3YJ
  • Cisco IOS 12.3YQ
  • Cisco IOS 12.3YT
  • Cisco IOS 12.3YU
  • Cisco IOS 12.4XA
  • Cisco IOS 12.4XF
  • Cisco IOS 12.4XK

Reported:

Mar 26, 2008

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