Apache mod_fcgid module fcgid_header_bucket_read() buffer overflow

apache-fcgid-bo (63303) The risk level is classified as HighHigh Risk

Description:

he Apache mod_fcgid module is vulnerable to a stack-based buffer overflow, caused by improper bounds checking by the fcgid_header_bucket_read() function. By sending specially-crafted FastCGO data, a local attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash.

*CVSS:

Base Score: 4.4
  Access Vector: Local
  Access Complexity: Medium
  Authentication: None
  Confidentiality Impact: Partial
  Integrity Impact: Partial
  Availability Impact: Partial
 
Temporal Score: 3.3
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Gain Access

Remedy:

Upgrade to the latest version of mod_fcgid (2.3.6 or later), available from the Apache Software Foundation Web site. See References.

References:

  • Apache Mailing List, Sun, 07 Nov 2010 21:43:40 GMT: mod_fcgid 2.3.6 is released.
  • Apache Software Foundation Web site: mod_fcgid.
  • BID-44900: Apache 'mod_fcgid' Module Unspecified Stack Buffer Overflow Vulnerability
  • CVE-2010-3872: The fcgid_header_bucket_read function in fcgid_bucket.c in the mod_fcgid module before 2.3.6 for the Apache HTTP Server does not use bytewise pointer arithmetic in certain circumstances, which has unspecified impact and attack vectors related to untrusted FastCGI applications and a stack buffer overwrite.
  • DSA-2140: libapache2-mod-fcgid -- stack overflow
  • OSVDB ID: 69275: Apache mod_fcgid Module fcgid_bucket.c fcgid_header_bucket_read() Function Remote Overflow
  • SA42288: Apache mod_fcgid Module fcgid_header_bucket_read() Security Issue
  • VUPEN/ADV-2010-2997: Apache mod_fcgid FastCGI Application Buffer Overflow Vulnerability

Platforms Affected:

  • Apache HTTP Server 2.0
  • Apache HTTP Server 2.2
  • Apache mod_fcgid 2.3

Reported:

Nov 07, 2010

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 the author/distributor (IBM Internet Security Systems X-Force) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

For corrections or additions please email ignore thisxforceignore this@ignore thisus.ignore thisibm.comignore this

Return to the main page

* According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
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.

About IBM Internet Security Systems

IBM Internet Security Systems is a trusted security advisor to thousands of the world's leading businesses and governments, helping to provide pre-emptive protection for networks, desktops and servers. The IBM Proventia? integrated security platform is designed to automatically protect against both known and unknown threats, helping to keep networks up and running and shield customers from online attacks before they impact business assets. IBM Internet Security Systems products and services are based on the proactive security intelligence of its X-Force? research and development team ? an unequivocal world authority in vulnerability and threat research. The IBM Internet Security Systems product line is also complemented by comprehensive Managed Security Services and Professional Security Services. For more information, visit the IBM Internet Security Systems Web site at www.iss.net or call 800-776-2362.