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Fencer Vulns
high 7.1

CVE-2009-1890 in the critical feed json

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…

published 2009-07-05 17 y ago modified 2026-06-16 4 mo ago also EUVD-2009-1885

cvss
7.1
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
16.2%
EPSS 16.2% chance of exploitation in 30 days, percentile 96%
public exploits
0
none known

Summary

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.

Patch / fix

  • apache http_server 2.2.12
  • apache2 Debian 14, Debian 13, Debian 12 2.2.11-7

debian advisories DEBIAN-CVE-2009-1890

  • httpd22 jboss enterprise web server 1 2.2.10-23.1.ep5.el4
  • mod_ssl22 jboss enterprise web server 1 1:2.2.10-23.1.ep5.el4
  • httpd22-apr jboss enterprise web server 1 2.2.10-23.1.ep5.el4
  • httpd22-apr-util jboss enterprise web server 1 2.2.10-23.1.ep5.el4
  • httpd RHEL 2 APPLICATION_STACK 2.2.11-3.el5s2
  • mod_ssl RHEL 2 APPLICATION_STACK 1:2.2.11-3.el5s2
  • httpd-manual RHEL 2 APPLICATION_STACK 2.2.11-3.el5s2
  • httpd jboss enterprise web server 1 2.2.10-10.ep5.el5

red hat advisories RHSA-2009:1160RHSA-2009:1156RHSA-2009:1155RHSA-2009:1148

  • apache2 openSUSE Tumbleweed 2.4.23-4.1

opensuse advisories openSUSE-SU-2024:10268-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2009-1890 updated cvss 5.0

httpd: mod_proxy reverse proxy DoS (infinite loop)

  • Red Hat Enterprise Linux (v. 5 server) httpd 2.2.3-22.el5_3.2, mod_ssl 2.2.3-22.el5_3.2, httpd-manual 2.2.3-22.el5_3.2 Red Hat Enterprise Linux Desktop (v. 5 client) httpd 2.2.3-22.el5_3.2, mod_ssl 2.2.3-22.el5_3.2, httpd-manual 2.2.3-22.el5_3.2 Red Hat Enterprise Linux Desktop Workstation (v. 5 client) httpd 2.2.3-22.el5_3.2, mod_ssl 2.2.3-22.el5_3.2, httpd-manual 2.2.3-22.el5_3.2
    fixed: vendor fix RHSA-2009:1148
  • Red Hat JBoss Enterprise Web Server 1 for RHEL 5 Server httpd 2.2.10-10.ep5.el5, mod_ssl 2.2.10-10.ep5.el5, httpd-manual 2.2.10-10.ep5.el5
    fixed: vendor fix RHSA-2009:1155
  • Red Hat JBoss Web Server 1.0 for RHEL 4 AS httpd22 2.2.10-23.1.ep5.el4, mod_ssl22 2.2.10-23.1.ep5.el4, httpd22-apr 2.2.10-23.1.ep5.el4, httpd22-apr-util 2.2.10-23.1.ep5.el4 Red Hat JBoss Web Server 1.0 for RHEL 4 ES httpd22 2.2.10-23.1.ep5.el4, mod_ssl22 2.2.10-23.1.ep5.el4, httpd22-apr 2.2.10-23.1.ep5.el4, httpd22-apr-util 2.2.10-23.1.ep5.el4
    fixed: vendor fix RHSA-2009:1160

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

16.16% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 7.1 AV:N/AC:M/Au:N/C:N/I:N/A:C

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.