CVE-2009-1955
7.5 · HIGHOverview
CVE-2009-1955 is a high-severity vulnerability affecting apache apr-util. It was published on June 8, 2009 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
The expat XML parser in the apr_xml_* interface in xml/apr_xml.c in Apache APR-util before 1.3.7, as used in the mod_dav and mod_dav_svn modules in the Apache HTTP Server, allows remote attackers to cause a denial of service (memory consumption) via a crafted XML document containing a large number of nested entity references, as demonstrated by a PROPFIND request, a similar issue to CVE-2003-1564.
Remediation
Check the references section for vendor advisories and patches from apache. Update apr-util to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| apache | apr-util | >= 0, < 1.3.7 | Affected |
| apple | mac_os_x | >= 0, < 10.6.2 | Affected |
| apache | http_server | >= 2.2.0, < 2.2.12 | Affected |
References
Frequently Asked Questions
What is CVE-2009-1955?
CVE-2009-1955 is a high-severity vulnerability affecting apache apr-util. It was published on June 8, 2009 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2009-1955?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2009-1955?
Check the references section for vendor advisories and patches from apache. Update apr-util to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2009-1955?
CyberStrike's AI-powered security agents can automatically detect CVE-2009-1955 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
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