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Fencer Intel
medium 5.0

CVE-2015-3183 json

The chunked transfer coding implementation in the Apache HTTP Server before 2.4.14 does not properly parse chunk headers, which allows remo…

published 2015-07-20 11 y ago modified 2026-06-17 4 mo ago also EUVD-2015-3253

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
74.4%
EPSS 74.4% chance of exploitation in 30 days, percentile 99.4%
public exploits
0
none known

Summary

The chunked transfer coding implementation in the Apache HTTP Server before 2.4.14 does not properly parse chunk headers, which allows remote attackers to conduct HTTP request smuggling attacks via a crafted request, related to mishandling of large chunk-size values and invalid chunk-extension characters in modules/http/http_filters.c.

Patch / fix

  • apache http_server 2.2.31, 2.4.16
  • apache2 Debian 14, Debian 13, Debian 12 2.4.16-1

debian advisories DEBIAN-CVE-2015-3183

  • apache2 Ubuntu 14.04 LTS 2.4.7-1ubuntu4.5

ubuntu advisories UBUNTU-CVE-2015-3183

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • mod_jk jboss enterprise application platform 6 1.2.41-2.redhat_4.ep6.el7
  • httpd22 jboss enterprise application platform 6 2.2.26-56.ep6.el7
  • mod_ssl22 jboss enterprise application platform 6 1:2.2.26-56.ep6.el7
  • mod_ldap22 jboss enterprise application platform 6 2.2.26-56.ep6.el7
  • mod_jk-ap22 jboss enterprise application platform 6 1.2.41-2.redhat_4.ep6.el7
  • jbcs-httpd24 jboss enterprise application platform 6 1-3.jbcs.el7
  • httpd22-tools jboss enterprise application platform 6 2.2.26-56.ep6.el7
  • tomcat-native jboss enterprise application platform 6 1.1.34-5.redhat_1.ep6.el7

red hat advisories RHSA-2016:2054RHSA-2016:2055RHSA-2015:2660RHSA-2015:2659RHSA-2016:0061RHSA-2015:1668

  • apache2 SLES for SAP 12, SLES 12, SLE Software Development Kit 12 2.4.10-14.10.1
  • apache2-mod_jk SLES for SAP 12, SLES 12 1.2.40-2.6.1
  • apache2-mod_fastcgi Enterprise Storage 1.0 2.4.7-3.4.1
  • apache2-mod_auth_kerb SLES for SAP 12, SLES 12 5.4-2.4.1
  • apache2-mod_security2 SLES for SAP 12, SLES 12 2.8.0-3.4.1
  • apache2 Studio Onsite 1.3, SLES 11 SP4, SLES 11 SP3-TERADATA +5 more 2.2.12-59.1

suse advisories SUSE-SU-2015:1851-1SUSE-SU-2015:1885-1SUSE-SU-2015:1885-2

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2015-3183 updated cvss 3.7

httpd: HTTP request smuggling attack against chunked request parser

  • Red Hat CloudForms Management Engine 5 httpd
    affected: no fix available
  • Red Hat Directory Server 8 httpd Red Hat Enterprise Linux 4 httpd Red Hat Enterprise Linux 5 httpd Red Hat JBoss Enterprise Web Server 1 httpd
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux Client Optional (v. 7) httpd 2.4.6-31.el7_1.1, mod_ssl 2.4.6-31.el7_1.1, mod_ldap 2.4.6-31.el7_1.1, httpd-tools 2.4.6-31.el7_1.1, mod_session 2.4.6-31.el7_1.1, httpd-manual 2.4.6-31.el7_1.1, +1 more Red Hat Enterprise Linux ComputeNode Optional (v. 7) httpd 2.4.6-31.el7_1.1, mod_ssl 2.4.6-31.el7_1.1, mod_ldap 2.4.6-31.el7_1.1, httpd-tools 2.4.6-31.el7_1.1, mod_session 2.4.6-31.el7_1.1, httpd-manual 2.4.6-31.el7_1.1, +1 more
    fixed: vendor fix RHSA-2015:1667
  • Red Hat Enterprise Linux Desktop (v. 6) httpd 2.2.15-47.el6_7, httpd-tools 2.2.15-47.el6_7 Red Hat Enterprise Linux Desktop Optional (v. 6) mod_ssl 2.2.15-47.el6_7, httpd-manual 2.2.15-47.el6_7 Red Hat Enterprise Linux HPC Node (v. 6) httpd 2.2.15-47.el6_7, httpd-tools 2.2.15-47.el6_7 Red Hat Enterprise Linux HPC Node Optional (v. 6) mod_ssl 2.2.15-47.el6_7, httpd-manual 2.2.15-47.el6_7 Red Hat Enterprise Linux Server (v. 6) httpd 2.2.15-47.el6_7, mod_ssl 2.2.15-47.el6_7, httpd-tools 2.2.15-47.el6_7, httpd-manual 2.2.15-47.el6_7
    fixed: vendor fix RHSA-2015:1668
  • Red Hat Enterprise Linux Server (v. 7) httpd 2.4.6-31.el7_1.1, httpd 2.4.6-31.ael7b_1.1, mod_ssl 2.4.6-31.el7_1.1, mod_ssl 2.4.6-31.ael7b_1.1, httpd-tools 2.4.6-31.el7_1.1, httpd-manual 2.4.6-31.el7_1.1, +2 more Red Hat Enterprise Linux Server Optional (v. 7) mod_ldap 2.4.6-31.el7_1.1, mod_ldap 2.4.6-31.ael7b_1.1, mod_session 2.4.6-31.el7_1.1, mod_session 2.4.6-31.ael7b_1.1, mod_proxy_html 2.4.6-31.el7_1.1, mod_proxy_html 2.4.6-31.ael7b_1.1
    fixed: vendor fix RHSA-2015:1667
  • Red Hat Enterprise Linux Workstation (v. 6) httpd 2.2.15-47.el6_7, mod_ssl 2.2.15-47.el6_7, httpd-tools 2.2.15-47.el6_7, httpd-manual 2.2.15-47.el6_7
    fixed: vendor fix RHSA-2015:1668
  • Red Hat Enterprise Linux Workstation (v. 7) httpd 2.4.6-31.el7_1.1, mod_ssl 2.4.6-31.el7_1.1, httpd-tools 2.4.6-31.el7_1.1, httpd-manual 2.4.6-31.el7_1.1 Red Hat Enterprise Linux Workstation Optional (v. 7) mod_ldap 2.4.6-31.el7_1.1, mod_session 2.4.6-31.el7_1.1, mod_proxy_html 2.4.6-31.el7_1.1
    fixed: vendor fix RHSA-2015:1667
  • Red Hat JBoss Enterprise Application Platform 6.4
    fixed: vendor fix RHSA-2016:2056
show 8 more
  • Red Hat JBoss Enterprise Application Platform 6.4 for RHEL 6 Server httpd 2.2.26-54.ep6.el6, jbcs-httpd24 1-3.jbcs.el6, mod_ssl 2.2.26-54.ep6.el6, mod_ldap 2.2.26-54.ep6.el6, httpd-tools 2.2.26-54.ep6.el6, httpd-manual 2.2.26-54.ep6.el6, +11 more
    fixed: vendor fix RHSA-2016:2055
  • Red Hat JBoss Enterprise Application Platform 6.4 for RHEL 7 Server httpd22 2.2.26-56.ep6.el7, jbcs-httpd24 1-3.jbcs.el7, mod_ssl22 2.2.26-56.ep6.el7, mod_ldap22 2.2.26-56.ep6.el7, httpd22-tools 2.2.26-56.ep6.el7, httpd22-manual 2.2.26-56.ep6.el7, +11 more
    fixed: vendor fix RHSA-2016:2054
  • Red Hat JBoss Enterprise Web Server 2 for RHEL 5 Server httpd 2.2.26-41.ep6.el5, mod_ssl 2.2.26-41.ep6.el5, httpd-tools 2.2.26-41.ep6.el5, httpd-manual 2.2.26-41.ep6.el5, mod_cluster-native 1.2.9-6.Final_redhat_2.ep6.el5 Red Hat JBoss Enterprise Web Server 2 for RHEL 6 Server httpd 2.2.26-41.ep6.el6, mod_ssl 2.2.26-41.ep6.el6, httpd-tools 2.2.26-41.ep6.el6, httpd-manual 2.2.26-41.ep6.el6, mod_cluster-native 1.2.9-6.Final_redhat_2.ep6.el6 Red Hat JBoss Enterprise Web Server 2 for RHEL 7 Server httpd22 2.2.26-42.ep6.el7, mod_ssl22 2.2.26-42.ep6.el7, httpd22-tools 2.2.26-42.ep6.el7, httpd22-manual 2.2.26-42.ep6.el7, mod_cluster-native 1.2.9-6.Final_redhat_2.ep6.el7
    fixed: vendor fix RHSA-2016:0061
  • Red Hat JBoss Web Server 2.1
    fixed: vendor fix RHSA-2016:0062
  • Red Hat JBoss Web Server 3.0
    fixed: vendor fix RHSA-2015:2661
  • Red Hat JBoss Web Server 3.0 for RHEL 6 httpd24 2.4.6-59.ep7.el6, mod_bmx 0.9.5-7.GA.ep7.el6, mod_ssl24 2.4.6-59.ep7.el6, mod_ldap24 2.4.6-59.ep7.el6, httpd24-tools 2.4.6-59.ep7.el6, mod_session24 2.4.6-59.ep7.el6, +26 more
    fixed: vendor fix RHSA-2015:2659
  • Red Hat JBoss Web Server 3.0 for RHEL 7 httpd24 2.4.6-59.ep7.el7, mod_bmx 0.9.5-7.GA.ep7.el7, mod_ssl24 2.4.6-59.ep7.el7, mod_ldap24 2.4.6-59.ep7.el7, httpd24-tools 2.4.6-59.ep7.el7, mod_session24 2.4.6-59.ep7.el7, +26 more
    fixed: vendor fix RHSA-2015:2660
  • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) httpd24-httpd 2.4.12-4.el6.2, httpd24-mod_ssl 2.4.12-4.el6.2, httpd24-mod_ldap 2.4.12-4.el6.2, httpd24-httpd-tools 2.4.12-4.el6.2, httpd24-mod_session 2.4.12-4.el6.2, httpd24-httpd-manual 2.4.12-4.el6.2, +1 more Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) httpd24-httpd 2.4.12-6.el7.1, httpd24-mod_ssl 2.4.12-6.el7.1, httpd24-mod_ldap 2.4.12-6.el7.1, httpd24-httpd-tools 2.4.12-6.el7.1, httpd24-mod_session 2.4.12-6.el7.1, httpd24-httpd-manual 2.4.12-6.el7.1, +1 more Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.5) httpd24-httpd 2.4.12-4.el6.2, httpd24-mod_ssl 2.4.12-4.el6.2, httpd24-mod_ldap 2.4.12-4.el6.2, httpd24-httpd-tools 2.4.12-4.el6.2, httpd24-mod_session 2.4.12-4.el6.2, httpd24-httpd-manual 2.4.12-4.el6.2, +1 more Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.6) httpd24-httpd 2.4.12-4.el6.2, httpd24-mod_ssl 2.4.12-4.el6.2, httpd24-mod_ldap 2.4.12-4.el6.2, httpd24-httpd-tools 2.4.12-4.el6.2, httpd24-mod_session 2.4.12-4.el6.2, httpd24-httpd-manual 2.4.12-4.el6.2, +1 more Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.1) httpd24-httpd 2.4.12-6.el7.1, httpd24-mod_ssl 2.4.12-6.el7.1, httpd24-mod_ldap 2.4.12-6.el7.1, httpd24-httpd-tools 2.4.12-6.el7.1, httpd24-mod_session 2.4.12-6.el7.1, httpd24-httpd-manual 2.4.12-6.el7.1, +1 more Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) httpd24-httpd 2.4.12-4.el6.2, httpd24-mod_ssl 2.4.12-4.el6.2, httpd24-mod_ldap 2.4.12-4.el6.2, httpd24-httpd-tools 2.4.12-4.el6.2, httpd24-mod_session 2.4.12-4.el6.2, httpd24-httpd-manual 2.4.12-4.el6.2, +1 more
    +1 more products
    Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) httpd24-httpd 2.4.12-6.el7.1, httpd24-mod_ssl 2.4.12-6.el7.1, httpd24-mod_ldap 2.4.12-6.el7.1, httpd24-httpd-tools 2.4.12-6.el7.1, httpd24-mod_session 2.4.12-6.el7.1, httpd24-httpd-manual 2.4.12-6.el7.1, +1 more
    fixed: vendor fix RHSA-2015:1666

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

74.39% chance of exploitation in the next 30 days, higher than 99.4% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:P/A:N

Classification

Weakness
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.