HAProxy trash buffer overflow

haproxy-trash-bo (75777) The risk level is classified as HighHigh Risk

Description:

HAProxy is vulnerable to a buffer overflow, caused by improper bounds checking when copying data into the trash buffer. If the global.tune.bufsize configuration option is set to a greater value than the default, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash.

*CVSS:

Base Score: 6.8
  Access Vector: Network
  Access Complexity: Medium
  Authentication: None
  Confidentiality Impact: Partial
  Integrity Impact: Partial
  Availability Impact: Partial
 
Temporal Score: 5
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Gain Access

Remedy:

Upgrade to the latest version of HAProxy (1.4.21 or later), available from the HAProxy Web site. See References.

References:

  • HAProxy Web Site: ChangeLog.
  • BID-53647: HAProxy Trash Buffer Overflow Vulnerability
  • CVE-2012-2942: Buffer overflow in the trash buffer in the header capture functionality in HAProxy before 1.4.21, when global.tune.bufsize is set to a value greater than the default and header rewriting is enabled, allows remote attackers to cause a denial of service and possibly execute arbitrary code via unspecified vectors.
  • DSA-2711: haproxy -- several vulnerabilities
  • OSVDB ID: 82092: HAProxy Boundary Error Trash Buffer Data Copying Remote Overflow
  • SA49261: HAProxy Trash Buffer Overflow Vulnerability

Platforms Affected:

  • HAProxy HAProxy 1.4.20

Reported:

May 21, 2012

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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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