CVE-2013-5704

Exp

The mod_headers module in the Apache HTTP Server 2.2.22 allows remote attackers to bypass "RequestHeader unset" directives by placing a header in the trailer portion of data sent with chunked transfer coding. NOTE: the vendor states "this is not a security issue in httpd as such."

Published: 2014-04-15 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2013-5704 is rated High Exploit Risk (69.8/100): CVSS Medium severity, with high exploitation likelihood (EPSS 65.04%, 98th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2013-5704

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2013-5704

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-11 64.69% 65.04% +0.36%
2 2026-03-08 76.15% 64.69% -11.46%
3 2026-03-04 — 76.15% —

Full EPSS history (46 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2013-5704

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2013-5704

OS Trackers for CVE-2013-5704

vendor priority summary link
debian medium CVE-2013-5704 medium priority: Debian including 1 source packages (apache2), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2013-5704
gentoo normal CVE-2013-5704: 1 GLSA(s) (201504-03), 1 atom(s) (www-servers/apache); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2013-5704
redhat low — https://access.redhat.com/security/cve/CVE-2013-5704
suse low CVE-2013-5704 severity low: SUSE including 362 source package names (amazon/suse-sles-15-sp1-chost-byos-v20210304-hvm-ssd-x86_64, amazon/suse-sles-15-sp1-chost-byos-v20220127-hvm-ssd-x86_64, …), 512 product×package rows across 57 product lines (HPE Helion OpenStack 8, SUSE Liberty Linux 7, … (57 product lines)): Known Affected 231, Fixed 194, Known Not Affected 87. https://www.suse.com/security/cve/CVE-2013-5704/
ubuntu low CVE-2013-5704 low priority: Ubuntu including 1 source packages (apache2), 7 status rows across 7 suites (lucid, precise, quantal, saucy, trusty, upstream, utopic): released 5, ignored 2. https://ubuntu.com/security/CVE-2013-5704

Affected software / configurations for CVE-2013-5704

Vendor Product Version Raw CPE
apache http_server 2.2.0 cpe:2.3:a:apache:http_server:2.2.0:*:*:*:*:*:*:*
apache http_server 2.2.2 cpe:2.3:a:apache:http_server:2.2.2:*:*:*:*:*:*:*
apache http_server 2.2.3 cpe:2.3:a:apache:http_server:2.2.3:*:*:*:*:*:*:*
apache http_server 2.2.4 cpe:2.3:a:apache:http_server:2.2.4:*:*:*:*:*:*:*
apache http_server 2.2.5 cpe:2.3:a:apache:http_server:2.2.5:*:*:*:*:*:*:*
apache http_server 2.2.6 cpe:2.3:a:apache:http_server:2.2.6:*:*:*:*:*:*:*
apache http_server 2.2.8 cpe:2.3:a:apache:http_server:2.2.8:*:*:*:*:*:*:*
apache http_server 2.2.9 cpe:2.3:a:apache:http_server:2.2.9:*:*:*:*:*:*:*
apache http_server 2.2.10 cpe:2.3:a:apache:http_server:2.2.10:*:*:*:*:*:*:*
apache http_server 2.2.11 cpe:2.3:a:apache:http_server:2.2.11:*:*:*:*:*:*:*
apache http_server 2.2.12 cpe:2.3:a:apache:http_server:2.2.12:*:*:*:*:*:*:*
apache http_server 2.2.13 cpe:2.3:a:apache:http_server:2.2.13:*:*:*:*:*:*:*
apache http_server 2.2.14 cpe:2.3:a:apache:http_server:2.2.14:*:*:*:*:*:*:*
apache http_server 2.2.15 cpe:2.3:a:apache:http_server:2.2.15:*:*:*:*:*:*:*
apache http_server 2.2.16 cpe:2.3:a:apache:http_server:2.2.16:*:*:*:*:*:*:*
apache http_server 2.2.17 cpe:2.3:a:apache:http_server:2.2.17:*:*:*:*:*:*:*
apache http_server 2.2.18 cpe:2.3:a:apache:http_server:2.2.18:*:*:*:*:*:*:*
apache http_server 2.2.19 cpe:2.3:a:apache:http_server:2.2.19:*:*:*:*:*:*:*
apache http_server 2.2.20 cpe:2.3:a:apache:http_server:2.2.20:*:*:*:*:*:*:*
apache http_server 2.2.21 cpe:2.3:a:apache:http_server:2.2.21:*:*:*:*:*:*:*
apache http_server 2.2.22 cpe:2.3:a:apache:http_server:2.2.22:*:*:*:*:*:*:*
apache http_server 2.2.23 cpe:2.3:a:apache:http_server:2.2.23:*:*:*:*:*:*:*
apache http_server 2.2.24 cpe:2.3:a:apache:http_server:2.2.24:*:*:*:*:*:*:*
apache http_server 2.2.25 cpe:2.3:a:apache:http_server:2.2.25:*:*:*:*:*:*:*
apache http_server 2.2.26 cpe:2.3:a:apache:http_server:2.2.26:*:*:*:*:*:*:*
apache http_server 2.2.27 cpe:2.3:a:apache:http_server:2.2.27:*:*:*:*:*:*:*
apache http_server 2.4.1 cpe:2.3:a:apache:http_server:2.4.1:*:*:*:*:*:*:*
apache http_server 2.4.2 cpe:2.3:a:apache:http_server:2.4.2:*:*:*:*:*:*:*
apache http_server 2.4.3 cpe:2.3:a:apache:http_server:2.4.3:*:*:*:*:*:*:*
apache http_server 2.4.4 cpe:2.3:a:apache:http_server:2.4.4:*:*:*:*:*:*:*
apache http_server 2.4.6 cpe:2.3:a:apache:http_server:2.4.6:*:*:*:*:*:*:*
apache http_server 2.4.7 cpe:2.3:a:apache:http_server:2.4.7:*:*:*:*:*:*:*
apache http_server 2.4.9 cpe:2.3:a:apache:http_server:2.4.9:*:*:*:*:*:*:*
apache http_server 2.4.10 cpe:2.3:a:apache:http_server:2.4.10:*:*:*:*:*:*:*
redhat enterprise_linux_desktop 6.0 cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*
redhat enterprise_linux_desktop 7.0 cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
redhat enterprise_linux_eus 7.3 cpe:2.3:o:redhat:enterprise_linux_eus:7.3:*:*:*:*:*:*:*
redhat enterprise_linux_eus 7.4 cpe:2.3:o:redhat:enterprise_linux_eus:7.4:*:*:*:*:*:*:*
redhat enterprise_linux_eus 7.5 cpe:2.3:o:redhat:enterprise_linux_eus:7.5:*:*:*:*:*:*:*
redhat enterprise_linux_eus 7.6 cpe:2.3:o:redhat:enterprise_linux_eus:7.6:*:*:*:*:*:*:*
redhat enterprise_linux_eus 7.7 cpe:2.3:o:redhat:enterprise_linux_eus:7.7:*:*:*:*:*:*:*
redhat enterprise_linux_server 6.0 cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*
redhat enterprise_linux_server 7.0 cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
redhat enterprise_linux_server_aus 7.3 cpe:2.3:o:redhat:enterprise_linux_server_aus:7.3:*:*:*:*:*:*:*
redhat enterprise_linux_server_aus 7.4 cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:*
redhat enterprise_linux_server_aus 7.6 cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:*
redhat enterprise_linux_server_aus 7.7 cpe:2.3:o:redhat:enterprise_linux_server_aus:7.7:*:*:*:*:*:*:*
redhat enterprise_linux_server_tus 7.3 cpe:2.3:o:redhat:enterprise_linux_server_tus:7.3:*:*:*:*:*:*:*
redhat enterprise_linux_server_tus 7.6 cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:*
redhat enterprise_linux_server_tus 7.7 cpe:2.3:o:redhat:enterprise_linux_server_tus:7.7:*:*:*:*:*:*:*
redhat enterprise_linux_workstation 6.0 cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*
redhat enterprise_linux_workstation 7.0 cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*
redhat jboss_enterprise_web_server 3.0.0 cpe:2.3:a:redhat:jboss_enterprise_web_server:3.0.0:*:*:*:*:*:*:*
redhat jboss_enterprise_web_server 2.0.0 cpe:2.3:a:redhat:jboss_enterprise_web_server:2.0.0:*:*:*:*:*:*:*
oracle enterprise_manager_ops_center < 12.1.4 cpe:2.3:a:oracle:enterprise_manager_ops_center:*:*:*:*:*:*:*:*
oracle enterprise_manager_ops_center 12.1.4 cpe:2.3:a:oracle:enterprise_manager_ops_center:12.1.4:*:*:*:*:*:*:*
oracle enterprise_manager_ops_center 12.2.0 cpe:2.3:a:oracle:enterprise_manager_ops_center:12.2.0:*:*:*:*:*:*:*
oracle enterprise_manager_ops_center 12.2.1 cpe:2.3:a:oracle:enterprise_manager_ops_center:12.2.1:*:*:*:*:*:*:*
oracle enterprise_manager_ops_center 12.3.0 cpe:2.3:a:oracle:enterprise_manager_ops_center:12.3.0:*:*:*:*:*:*:*
oracle http_server 10.1.3.5.0 cpe:2.3:a:oracle:http_server:10.1.3.5.0:*:*:*:*:*:*:*
oracle http_server 11.1.1.7.0 cpe:2.3:a:oracle:http_server:11.1.1.7.0:*:*:*:*:*:*:*
oracle http_server 12.1.2.0 cpe:2.3:a:oracle:http_server:12.1.2.0:*:*:*:*:*:*:*
oracle http_server 12.1.3.0 cpe:2.3:a:oracle:http_server:12.1.3.0:*:*:*:*:*:*:*
oracle linux 6 cpe:2.3:o:oracle:linux:6:-:*:*:*:*:*:*
oracle solaris 11.2 cpe:2.3:o:oracle:solaris:11.2:*:*:*:*:*:*:*
apple mac_os_x < 10.10.4 cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
apple mac_os_x_server < 5.0.3 cpe:2.3:o:apple:mac_os_x_server:*:*:*:*:*:*:*:*
canonical ubuntu_linux 10.04 cpe:2.3:o:canonical:ubuntu_linux:10.04:*:*:*:-:*:*:*
canonical ubuntu_linux 12.04 cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:*
canonical ubuntu_linux 14.04 cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
canonical ubuntu_linux 14.10 cpe:2.3:o:canonical:ubuntu_linux:14.10:*:*:*:*:*:*:*

References for CVE-2013-5704

URL Tags
http://lists.apple.com/archives/security-announce/2015/Apr/msg00001.html Mailing List Third Party Advisory
http://lists.apple.com/archives/security-announce/2015/Sep/msg00004.html Mailing List Third Party Advisory
http://marc.info/?l=apache-httpd-dev&m=139636309822854&w=2 Mailing List Third Party Advisory
http://marc.info/?l=bugtraq&m=143403519711434&w=2 Issue Tracking Mailing List Third Party Advisory
http://marc.info/?l=bugtraq&m=144493176821532&w=2 Issue Tracking Mailing List Third Party Advisory
http://martin.swende.se/blog/HTTPChunked.html Broken Link Exploit Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2015-0325.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2015-1249.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2015-2661.html Broken Link Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-0061.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-0062.html Third Party Advisory
http://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x/CHANGES Release Notes Vendor Advisory
http://svn.apache.org/viewvc/httpd/httpd/trunk/modules/proxy/mod_proxy_http.c Patch Vendor Advisory
http://svn.apache.org/viewvc/httpd/httpd/trunk/modules/proxy/mod_proxy_http.c?r1=1610674&r2=1610814&diff_format=h Patch Vendor Advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2014:174 Third Party Advisory
http://www.oracle.com/technetwork/topics/security/bulletinjan2015-2370101.html Third Party Advisory
http://www.oracle.com/technetwork/topics/security/cpujan2015-1972971.html Third Party Advisory
http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html Third Party Advisory
http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html Third Party Advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html Third Party Advisory
http://www.securityfocus.com/bid/66550 Third Party Advisory VDB Entry
http://www.ubuntu.com/usn/USN-2523-1 Third Party Advisory
https://access.redhat.com/errata/RHSA-2015:2659 Third Party Advisory
https://access.redhat.com/errata/RHSA-2015:2660 Third Party Advisory
https://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04832246 Third Party Advisory
https://httpd.apache.org/security/vulnerabilities_24.html Vendor Advisory
https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/8d63cb8e9100f28a99429b4328e4e7cebce861d5772ac9863ba2ae6f%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/f7f95ac1cd9895db2714fa3ebaa0b94d0c6df360f742a40951384a53%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r57608dc51b79102f3952ae06f54d5277b649c86d6533dcd6a7d201f7%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r75cbe9ea3e2114e4271bbeca7aff96117b50c1b6eb7c4772b0337c1f%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r83109088737656fa6307bd99ab40f8ff0269ae58d3f7272d7048494a%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r9821b0a32a1d0a1b4947abb6f3630053fcbb2ec905d9a32c2bd4d4ee%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r9ea3538f229874c80a10af473856a81fbf5f694cd7f471cc679ba70b%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/ra7f6aeb28661fbf826969526585f16856abc4615877875f9d3b35ef4%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/rcc44594d4d6579b90deccd4536b5d31f099ef563df39b094be286b9e%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/rdca61ae990660bacb682295f2a09d34612b7bb5f457577fe17f4d064%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/re3d27b6250aa8548b8845d314bb8a350b3df326cacbbfdfe4d455234%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/rfbaf647d52c1cb843e726a0933f156366a806cead84fbd430951591b%40%3Ccvs.httpd.apache.org%3E
https://security.gentoo.org/glsa/201504-03 Third Party Advisory
https://support.apple.com/HT204659 Third Party Advisory
https://support.apple.com/HT205219 Third Party Advisory
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