The mod_proxy_ajp module in the Apache HTTP Server before 2.2.21, when used with mod_proxy_balancer in certain configurations, allows…

Description

The mod_proxy_ajp module in the Apache HTTP Server before 2.2.21, when used with mod_proxy_balancer in certain configurations, allows remote attackers to cause a denial of service (temporary "error state" in the backend server) via a malformed HTTP request.

Scores

EPSS (exploitation in 30 days)

22.4% · top 2.3% of all CVEs (2 Nov 2026)

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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.3.

Weakness

• n/a
• CWE-400 (opens in a new tab)

Affected products

• n/a

  • affected n/a

References (30)

• HPSBUX02707 (opens in a new tab)vendor-advisoryx_refsource_HPx_transferred
• apache-modproxyajp-dos(69804) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
• http://support.apple.com/kb/HT5130 (opens in a new tab)x_refsource_CONFIRMx_transferred
• RHSA-2011:1391 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• oval:org.mitre.oval:def:14941 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
• RHSA-2012:0543 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• SSRT100619 (opens in a new tab)vendor-advisoryx_refsource_HPx_transferred
• http://www.oracle.com/technetwork/topics/security/cpujuly2013-1899826.html (opens in a new tab)x_refsource_CONFIRMx_transferred
• MDVSA-2011:168 (opens in a new tab)vendor-advisoryx_refsource_MANDRIVAx_transferred
• APPLE-SA-2012-02-01-1 (opens in a new tab)vendor-advisoryx_refsource_APPLEx_transferred
• http://community.jboss.org/message/625307 (opens in a new tab)x_refsource_MISCx_transferred
• 49616 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
• RHSA-2012:0542 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• http://www.apache.org/dist/httpd/Announcement2.2.html (opens in a new tab)x_refsource_CONFIRMx_transferred
• http://httpd.apache.org/security/vulnerabilities_22.html#2.2.21 (opens in a new tab)x_refsource_CONFIRMx_transferred
• 1026054 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
• oval:org.mitre.oval:def:18154 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
• 46013 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• [httpd-cvs] 20190815 svn commit: r1048743 [3/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [httpd-cvs] 20190815 svn commit: r1048742 [3/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [httpd-cvs] 20200401 svn commit: r1058586 [3/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [httpd-cvs] 20200401 svn commit: r1058587 [3/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [httpd-cvs] 20210330 svn commit: r1073139 [1/13] - in /websites/staging/httpd/trunk/content: ./ security/json/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [httpd-cvs] 20210330 svn commit: r1073140 [3/4] - in /websites/staging/httpd/trunk/content: ./ security/cvejsontohtml.py security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [httpd-cvs] 20210330 svn commit: r1888194 [7/13] - /httpd/site/trunk/content/security/json/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [httpd-cvs] 20210330 svn commit: r1073139 [7/13] - in /websites/staging/httpd/trunk/content: ./ security/json/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [httpd-cvs] 20210330 svn commit: r1073149 [8/13] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [httpd-cvs] 20210330 svn commit: r1073146 [2/3] - in /websites/staging/httpd/trunk/content: ./ security/cvejsontohtml.py security/vulnerabilities-httpd.xml security/vulnerabilities_22.html security/vulnerabilities_24.html (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [httpd-cvs] 20210330 svn commit: r1073149 [1/13] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [httpd-cvs] 20210606 svn commit: r1075470 [3/4] - in /websites/staging/httpd/trunk/content: ./ security/json/CVE-2020-13938.json security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html (opens in a new tab)mailing-listx_refsource_MLISTx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Record last updated 6 Aug 2024, 23:29 UTC.