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Improper Restriction of Operations within the Bounds of a Memory Buffer

CVE-2009-0023

High
8.8/10

Summary

The "apr_strmatch_precompile" function in "strmatch/apr_strmatch.c" in Apache APR-util versions 0.9.1 through 0.9.15 and 1.x.x prior to 1.3.5 allows remote attackers to cause a Denial of Service (daemon crash) via crafted input involving (1) a ".htaccess" file used with the Apache HTTP Server, (2) the "SVNMasterURI" directive in the "mod_dav_svn" module in the Apache HTTP Server, (3) the "mod_apreq2" module for the Apache HTTP Server, or (4) an application that uses the "libapreq2" library, which triggers a Heap-based Buffer Underflow. This issue affects Apache HTTP Server versions 2.2.x prior to 2.2.12.

  • LOW
  • NETWORK
  • HIGH
  • UNCHANGED
  • REQUIRED
  • NONE
  • HIGH
  • HIGH

CWE-119 - Buffer Overflow

Buffer overflow attacks involve data transit and operations exceeding the restricted memory buffer, thereby corrupting or overwriting data in adjacent memory locations. Such overflow allows the attacker to run arbitrary code or manipulate the existing code to cause privilege escalation, data breach, denial of service, system crash and even complete system compromise. Given that languages such as C and C++ lack default safeguards against overwriting or accessing data in their memory, applications utilizing these languages are most susceptible to buffer overflows attacks.

References

Advisory Timeline

  • Published