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Vulnerability record · CVE-2002-1850 · published 31 December 2002

CVE-2002-1850: Apache http server vulnerability

Apache · Http Server

mod_cgi in Apache 2.0.39 and 2.0.40 allows local users and possibly remote attackers to cause a denial of service (hang and memory consumption) by causing a CGI script to send a large amount of data to stderr, which results in a read/write deadlock between httpd and the CGI script.

7.5 CVSS 3.1 High EPSS 17% · top 3.0% CWE-667 · CWE-667
7.5CVSS 3.1 base score, v2 5.0
17%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
18References, 4 tagged exploit
16 Jun 2026Last modified by NVD

Description

mod_cgi in Apache 2.0.39 and 2.0.40 allows local users and possibly remote attackers to cause a denial of service (hang and memory consumption) by causing a CGI script to send a large amount of data to stderr, which results in a read/write deadlock between httpd and the CGI script.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://cvs.apache.org/viewcvs.cgi/httpd-2.0/modules/generators/mod_cgi.c?r1=1.148.2.7&r2=1.148.2.8 Broken Link
http://issues.apache.org/bugzilla/show_bug.cgi?id=10515 Issue Tracking
http://issues.apache.org/bugzilla/show_bug.cgi?id=22030 Issue TrackingPatch
http://marc.info/?l=apache-httpd-dev&m=103291952019514&w=2 Mailing List
http://seclists.org/bugtraq/2002/Sep/0253.html ExploitMailing ListThird Party Advisory
http://securitytracker.com/id?1007823 Broken LinkPatchThird Party AdvisoryVDB Entry
http://www.iss.net/security_center/static/10200.php Broken LinkPatch
http://www.securityfocus.com/bid/5787 Broken LinkExploitThird Party AdvisoryVDB Entry
http://www.securityfocus.com/bid/8725 Broken LinkPatchThird Party AdvisoryVDB Entry
http://cvs.apache.org/viewcvs.cgi/httpd-2.0/modules/generators/mod_cgi.c?r1=1.148.2.7&r2=1.148.2.8 Broken Link
http://issues.apache.org/bugzilla/show_bug.cgi?id=10515 Issue Tracking
http://issues.apache.org/bugzilla/show_bug.cgi?id=22030 Issue TrackingPatch
http://marc.info/?l=apache-httpd-dev&m=103291952019514&w=2 Mailing List
http://seclists.org/bugtraq/2002/Sep/0253.html ExploitMailing ListThird Party Advisory
http://securitytracker.com/id?1007823 Broken LinkPatchThird Party AdvisoryVDB Entry
http://www.iss.net/security_center/static/10200.php Broken LinkPatch
http://www.securityfocus.com/bid/5787 Broken LinkExploitThird Party AdvisoryVDB Entry
http://www.securityfocus.com/bid/8725 Broken LinkPatchThird Party AdvisoryVDB Entry

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2002-1850), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.