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CVE-2009-1890

7.1 · HIGH

The stream_reqbody_cl function in mod_proxy_http.c in the mod_proxy module in the Apache HTTP Server before 2.3.3, when a reverse proxy is configured, does not properly handle an amount of streamed…

Published Jul 5, 2009apacheCWE-400EPSS 16.16%

Overview

CVE-2009-1890 is a high-severity vulnerability affecting apache http_server. It was published on July 5, 2009 and has a CVSS 2.0 base score of 7.1 (HIGH).

This vulnerability has a CVSS 2.0 base score of 7.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

The stream_reqbody_cl function in mod_proxy_http.c in the mod_proxy module in the Apache HTTP Server before 2.3.3, when a reverse proxy is configured, does not properly handle an amount of streamed data that exceeds the Content-Length value, which allows remote attackers to cause a denial of service (CPU consumption) via crafted requests.

Remediation

Check the references section for vendor advisories and patches from apache. Update http_server 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

VendorProductVersionsStatus
apachehttp_server>= 2.2.0, < 2.2.12Affected

References

Reflists.apple.com/archives/security-announce/2009/Nov/msg00000.htmlReflists.opensuse.org/opensuse-security-announce/2009-10/msg00006.htmlRefmarc.info/?l=bugtraq&m=129190899612998&w=2Refosvdb.org/55553Refsecunia.com/advisories/35691Refsecunia.com/advisories/35721Refsecunia.com/advisories/35793Refsecunia.com/advisories/35865Refsecunia.com/advisories/37152Refsecunia.com/advisories/37221

How CyberStrike helps

Frequently asked questions

What is CVE-2009-1890?

CVE-2009-1890 is a high-severity vulnerability affecting apache http_server. It was published on July 5, 2009 and has a CVSS 2.0 base score of 7.1 (HIGH).

How severe is CVE-2009-1890?

This vulnerability has a CVSS 2.0 base score of 7.1, 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-2009-1890?

Check the references section for vendor advisories and patches from apache. Update http_server 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-2009-1890?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2009-1890 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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