Skip to main content

Uncontrolled Resource Consumption

CVE-2009-3720

High
7.5/10

Summary

The "updatePosition" function in 'lib/xmltok_impl.c' in 'libexpat' in Expat 2.0.1, as used in Python, PyXML, w3c-libwww, and other software, allows context-dependent attackers to cause a Denial of Service (application crash) via an XML document with crafted UTF-8 sequences that trigger a buffer over-read, a different vulnerability than CVE-2009-2625. This issue also affects Apache HTTP Server in versions 2.0.35 through 2.0.63, and 2.2.0 through 2.2.16.

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

CWE-400 - Uncontrolled resource consumption

An uncontrolled resource allocation attack (also known as resource exhaustion attack) triggers unauthorized overconsumption of the limited resources in an application, such as memory, file system storage, database connection pool entries, and CPU. This may lead to denial of service for valid users and degradation of the application's functionality as well as that of the host operating system.

References

Advisory Timeline

  • Published