Open Phone Abstraction Library SIP_PDU::Read() denial of service

opal-sip-dos (37000) The risk level is classified as MediumMedium Risk

Description:

The Open Phone Abstraction Library (opal), which is used in Ekiga and OpenH323, is vulnerable to a denial of service, caused by an error in the SIP_PDU::Read() method in sip/sippdu.cxx when processing SIP packets. By sending a specially-crafted SIP packet, a remote attacker could exploit this vulnerability to write a zero byte to an arbitrary memory address and crash the application.

*CVSS:

Base Score: 5
  Access Vector: Network
  Access Complexity: Low
  Authentication: None
  Confidentiality Impact: None
  Integrity Impact: None
  Availability Impact: Partial
 
Temporal Score: 3.7
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Denial of Service

Remedy:

For Open H323:
Apply the fix for this vulnerability, available from the OpenH323 SVN Repository. See References.

For Ekiga:
Upgrade to the latest version of Ekiga (2.0.11 or later), available from the Ekiga Web site. See References.

For other distributions:
Contact your vendor for upgrade or patch information.

References:

Platforms Affected:

  • Canonical Ubuntu 6.06 LTS
  • Canonical Ubuntu 6.10
  • Canonical Ubuntu 7.04
  • Ekiga Ekiga prior to 2.0.11
  • MandrakeSoft Mandrake Linux 2007
  • MandrakeSoft Mandrake Linux 2007 X86_64
  • MandrakeSoft Mandrake Linux 2007.1 X86_64
  • MandrakeSoft Mandrake Linux 2007.1
  • OpenH323 OpenH323 2.2.4 and prior
  • RedHat Enterprise Linux 5 Client
  • RedHat Enterprise Linux 5 Client Workstation
  • RedHat Enterprise Linux Optional Productivity Applications 5 Server
  • SuSE SuSE Linux Desktop 10.0

Reported:

Sep 19, 2007

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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