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    CVE-2002-1850

    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.

    Published:Dec 31, 2002
    Last Modified:Apr 16, 2026
    EPS:Jun 28, 2005
    EPSS Score:0.02915
    CVSS Score:7.5

    Affected Products

    Vendor
    Apache
    Product
    Http Server

    Exploits

    http://seclists.org/bugtraq/2002/Sep/0253.htmlhttp://www.securityfocus.com/bid/5787http://seclists.org/bugtraq/2002/Sep/0253.htmlhttp://www.securityfocus.com/bid/5787https://www.exploit-db.com/exploits/21854

    Common Weakness Enumeration

    CWE-667 Improper Locking

    Related CVEs

    CVE-2026-48913 (CVSS 7.3) — Use After Free vulnerability in Apache HTTP Server module mod_http2 when file handles are already exhausted. …
    CVE-2026-42536 (CVSS 7.5) — Heap-based Buffer Overflow vulnerability in Apache HTTP Server with mod_xml2enc, xml2StartParse, and untrusted…
    CVE-2026-44185 (CVSS 7.3) — Buffer Over-read vulnerability in Apache HTTP Server via outbound OCSP requests to an attacker controlled OCSP…
    CVE-2026-34355 (CVSS 7.5) — A buffer overflow in mod_proxy_html in Apache HTTP Server 2.4.67 and earlier allows an attack by an untrusted …
    CVE-2026-44631 (CVSS 9.8) — Buffer Underwrite vulnerability in Apache HTTP Server on crafted regular expressions in the configuration. Th…
    CVE-2026-44119 (CVSS 5.5) — Improper Privilege Management vulnerability in Apache HTTP Server 2.4.67 and earlier allows local .htaccess au…
    CVE-2026-43951 (CVSS 6.5) — Out-of-bounds Read vulnerability in Apache HTTP Server with mod_headers and mod_mime and multiple response lan…
    CVE-2026-42535 (CVSS 9.1) — A path handling issue in mod_dav_fs in Apache 2.4.67 and earlier allows a WebDAV content author to directly ma…
    CVE-2026-34356 (CVSS 7.5) — Heap-based Buffer Overflow vulnerability in Apache HTTP Server with malicious backend servers and ProxyPassRev…
    CVE-2026-44186 (CVSS 7.3) — Loop with Unreachable Exit Condition ('Infinite Loop') vulnerability in the mod_proxy_ftp module in Apache HTT…

    References

    http://cvs.apache.org/viewcvs.cgi/httpd-2.0/modules/generators/mod_cgi.c?r1=1.148.2.7&r2=1.148.2.8
    http://issues.apache.org/bugzilla/show_bug.cgi?id=10515
    http://issues.apache.org/bugzilla/show_bug.cgi?id=22030
    http://marc.info/?l=apache-httpd-dev&m=103291952019514&w=2
    http://seclists.org/bugtraq/2002/Sep/0253.html
    http://securitytracker.com/id?1007823
    http://www.iss.net/security_center/static/10200.php
    http://www.securityfocus.com/bid/5787
    http://www.securityfocus.com/bid/8725
    http://cvs.apache.org/viewcvs.cgi/httpd-2.0/modules/generators/mod_cgi.c?r1=1.148.2.7&r2=1.148.2.8
    http://issues.apache.org/bugzilla/show_bug.cgi?id=10515
    http://issues.apache.org/bugzilla/show_bug.cgi?id=22030
    http://marc.info/?l=apache-httpd-dev&m=103291952019514&w=2
    http://seclists.org/bugtraq/2002/Sep/0253.html
    http://securitytracker.com/id?1007823
    http://www.iss.net/security_center/static/10200.php
    http://www.securityfocus.com/bid/5787
    http://www.securityfocus.com/bid/8725

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High