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Vulnerability record · CVE-2014-3581 · published 10 October 2014

CVE-2014-3581: Apache http server null pointer dereference vulnerability

Apache · Http Server

The cache_merge_headers_out function in modules/cache/cache_util.c in the mod_cache module in the Apache HTTP Server before 2.4.11 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via an empty HTTP Content-Type header.

5.0 CVSS 2.0 Medium EPSS 14% · top 3.7% CWE-476 · NULL pointer dereference
5.0CVSS 2.0 base score
14%EPSS exploitation probability, 30 days
NoNot in CISA KEV
9Affected product versions listed by NVD
58References
17 Jun 2026Last modified by NVD

Description

The cache_merge_headers_out function in modules/cache/cache_util.c in the mod_cache module in the Apache HTTP Server before 2.4.11 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via an empty HTTP Content-Type header.

AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

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

References

LinkTags
http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html Broken LinkMailing List
http://lists.apple.com/archives/security-announce/2015/Sep/msg00004.html Broken LinkMailing List
http://rhn.redhat.com/errata/RHSA-2015-0325.html Third Party Advisory
http://svn.apache.org/viewvc/httpd/httpd/branches/2.4.x/CHANGES?view=markup&pathrev=1627749 Release NotesVendor Advisory
http://svn.apache.org/viewvc?view=revision&revision=1624234 PatchVendor Advisory
http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html Third Party Advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html Third Party Advisory
http://www.securityfocus.com/bid/71656 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1031005 Broken LinkThird Party AdvisoryVDB Entry
http://www.ubuntu.com/usn/USN-2523-1 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1149709 Issue TrackingPatchThird Party Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/97027 Third Party AdvisoryVDB Entry
https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba%40%3Ccvs.httpd.apache.org%
https://lists.apache.org/thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830%40%3Ccvs.httpd.apache.org%
https://lists.apache.org/thread.html/r476d175be0aaf4a17680ef98c5153b4d336eaef76fb2224cc94c463a%40%3Ccvs.httpd.apache.org
https://lists.apache.org/thread.html/r76142b8c5119df2178be7c2dba88fde552eedeec37ea993dfce68d1d%40%3Ccvs.httpd.apache.org
https://lists.apache.org/thread.html/r83109088737656fa6307bd99ab40f8ff0269ae58d3f7272d7048494a%40%3Ccvs.httpd.apache.org
https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org
https://lists.apache.org/thread.html/ra7f6aeb28661fbf826969526585f16856abc4615877875f9d3b35ef4%40%3Ccvs.httpd.apache.org
https://lists.apache.org/thread.html/rb14daf9cc4e28d18cdc15d6a6ca74e565672fabf7ad89541071d008b%40%3Ccvs.httpd.apache.org
https://lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a%40%3Ccvs.httpd.apache.org
https://lists.apache.org/thread.html/rcc44594d4d6579b90deccd4536b5d31f099ef563df39b094be286b9e%40%3Ccvs.httpd.apache.org
https://lists.apache.org/thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f%40%3Ccvs.httpd.apache.org
https://lists.apache.org/thread.html/rd336919f655b7ff309385e34a143e41c503e133da80414485b3abcc9%40%3Ccvs.httpd.apache.org
https://lists.apache.org/thread.html/re3d27b6250aa8548b8845d314bb8a350b3df326cacbbfdfe4d455234%40%3Ccvs.httpd.apache.org
https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org
https://security.gentoo.org/glsa/201610-02 Third Party Advisory
https://support.apple.com/HT205219 Third Party Advisory
https://support.apple.com/kb/HT205031 Third Party Advisory
http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html Broken LinkMailing List
http://lists.apple.com/archives/security-announce/2015/Sep/msg00004.html Broken LinkMailing List
http://rhn.redhat.com/errata/RHSA-2015-0325.html Third Party Advisory
http://svn.apache.org/viewvc/httpd/httpd/branches/2.4.x/CHANGES?view=markup&pathrev=1627749 Release NotesVendor Advisory
http://svn.apache.org/viewvc?view=revision&revision=1624234 PatchVendor Advisory
http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html Third Party Advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html Third Party Advisory
http://www.securityfocus.com/bid/71656 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1031005 Broken LinkThird Party AdvisoryVDB Entry
http://www.ubuntu.com/usn/USN-2523-1 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1149709 Issue TrackingPatchThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2014-3581), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.