Memory leak in ssl_engine_io.c for mod_ssl in Apache 2 before 2.0.49 allows remote attackers to cause a denial of service (memory consumpti…

Description

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

Advisories 1

• RHSA-2004:084 Red Hat Security Advisory: httpd security update Red Hat Security Advisories (RHSA) · Jun 26, 2026

References

• APPLE-SA-2004-05-03 vendor-advisory
• 20040325 LNSA-#2004-0006: bug workaround for Apache 2.0.48 mailing-list
• SSRT4717 vendor-advisory
• http://www.apacheweek.com/features/security-20
• oval:org.mitre.oval:def:876 vdb-entry signature
• RHSA-2004:182 vendor-advisory
• CLSA-2004:839 vendor-advisory
• http://issues.apache.org/bugzilla/show_bug.cgi?id=27106
• 9826 vdb-entry
• 2004-0017 vendor-advisory
• RHSA-2004:084 vendor-advisory
• GLSA-200403-04 vendor-advisory
• apache-modssl-plain-dos(15419) vdb-entry
• MDKSA-2004:043 vendor-advisory
• 4182 vdb-entry
• [apache-cvs] 20040307 cvs commit: httpd-2.0/modules/ssl ssl_engine_io.c mailing-list
• [httpd-cvs] 20190815 svn commit: r1048742 [2/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilit mailing-list
• [httpd-cvs] 20190815 svn commit: r1048743 [2/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilit mailing-list
• [httpd-cvs] 20200401 svn commit: r1058586 [2/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilit mailing-list
• [httpd-cvs] 20200401 svn commit: r1058587 [2/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilit mailing-list
• [httpd-cvs] 20210330 svn commit: r1073139 [1/13] - in /websites/staging/httpd/trunk/content: ./ security/json/ mailing-list
• [httpd-cvs] 20210330 svn commit: r1073139 [2/13] - in /websites/staging/httpd/trunk/content: ./ security/json/ mailing-list
• [httpd-cvs] 20210330 svn commit: r1888194 [2/13] - /httpd/site/trunk/content/security/json/ mailing-list
• [httpd-cvs] 20210330 svn commit: r1073140 [2/4] - in /websites/staging/httpd/trunk/content: ./ security/cvejsontohtml.py security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.ht mailing-list
• [httpd-cvs] 20210330 svn commit: r1073143 [2/3] - in /websites/staging/httpd/trunk/content: ./ security/ mailing-list
• [httpd-cvs] 20210330 svn commit: r1073149 [3/13] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/ mailing-list
• [httpd-cvs] 20210330 svn commit: r1073149 [1/13] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/ mailing-list
• [httpd-cvs] 20210603 svn commit: r1075360 [1/3] - in /websites/staging/httpd/trunk/content: ./ security/json/CVE-2021-31618.json security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabiliti mailing-list
• [httpd-cvs] 20210606 svn commit: r1075470 [2/4] - 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/vulnerabiliti mailing-list