VulnerabilityModified

CVE-2013-5704

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.

MEDIUM 5.0EPSS 58.0%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 58.0%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.

Description

CVSS 2.0: 5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:P/A:N
EPSS: 57.99% probability · 99th percentile
Public exploits: None in Exploit-DB
CISA KEV: Not listed
Affected: apache/http server · redhat/enterprise linux desktop · redhat/enterprise linux eus · redhat/enterprise linux server · redhat/enterprise linux server aus · redhat/enterprise linux server tus · redhat/enterprise linux workstation · redhat/jboss enterprise web server · oracle/enterprise manager ops center · oracle/http server · oracle/linux · oracle/solaris · apple/mac os x · apple/mac os x server · canonical/ubuntu linux
Source: cve@mitre.org

EPSS trend

EPSS moved from 52.6% on 27 September 2026 to 58.0% on 4 November 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.

References

http://lists.apple.com/archives/security-announce/2015/Apr/msg00001.htmlMailing List, Third Party Advisory
http://lists.apple.com/archives/security-announce/2015/Sep/msg00004.htmlMailing List, Third Party Advisory
http://marc.info/?l=apache-httpd-dev&m=139636309822854&w=2Mailing List, Third Party Advisory
http://marc.info/?l=bugtraq&m=143403519711434&w=2Issue Tracking, Mailing List, Third Party Advisory
http://marc.info/?l=bugtraq&m=144493176821532&w=2Issue Tracking, Mailing List, Third Party Advisory
http://martin.swende.se/blog/HTTPChunked.htmlBroken Link, Exploit, Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2015-0325.htmlThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2015-1249.htmlThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2015-2661.htmlBroken Link, Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-0061.htmlThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-0062.htmlThird Party Advisory
http://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x/CHANGESRelease Notes, Vendor Advisory
http://svn.apache.org/viewvc/httpd/httpd/trunk/modules/proxy/mod_proxy_http.cPatch, Vendor Advisory
http://svn.apache.org/viewvc/httpd/httpd/trunk/modules/proxy/mod_proxy_http.c?r1=1610674&r2=1610814&diff_format=hPatch, Vendor Advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2014:174Third Party Advisory
http://www.oracle.com/technetwork/topics/security/bulletinjan2015-2370101.htmlThird Party Advisory
http://www.oracle.com/technetwork/topics/security/cpujan2015-1972971.htmlThird Party Advisory
http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.htmlThird Party Advisory
http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.htmlThird Party Advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.htmlThird Party Advisory
http://www.securityfocus.com/bid/66550Third Party Advisory, VDB Entry
http://www.ubuntu.com/usn/USN-2523-1Third Party Advisory
https://access.redhat.com/errata/RHSA-2015:2659Third Party Advisory
https://access.redhat.com/errata/RHSA-2015:2660Third Party Advisory
https://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04832246Third Party Advisory
https://httpd.apache.org/security/vulnerabilities_24.htmlVendor 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

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.