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Fencer Vulns
medium 5.3

CVE-2019-0220 json

A vulnerability was found in Apache HTTP Server 2.4.0 to 2.4.38.

published 2019-06-11 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-1006

cvss
5.3
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
17.9%
EPSS 17.9% chance of exploitation in 30 days, percentile 97%
public exploits
0
none known

Summary

A vulnerability was found in Apache HTTP Server 2.4.0 to 2.4.38. When the path component of a request URL contains multiple consecutive slashes ('/'), directives such as LocationMatch and RewriteRule must account for duplicates in regular expressions while other aspects of the servers processing will implicitly collapse them.

Patch / fix

  • apache2 Debian 14, Debian 13, Debian 12 2.4.38-3

debian advisories DEBIAN-CVE-2019-0220

  • apache2 Ubuntu 14.04 LTS 2.4.7-1ubuntu4.22
  • apache2 Ubuntu 16.04 LTS 2.4.18-2ubuntu3.10
  • apache2 Ubuntu 18.04 LTS 2.4.29-1ubuntu4.6

ubuntu advisories UBUNTU-CVE-2019-0220

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

  • httpd24-httpd RHEL 3 SOFTWARE_COLLECTIONS 2.4.34-15.el6
  • httpd24-httpd RHEL 3 SOFTWARE_COLLECTIONS 2.4.34-15.el7
  • httpd24 RHEL 3 SOFTWARE_COLLECTIONS 1.1-19.el6
  • httpd24 RHEL 3 SOFTWARE_COLLECTIONS 1.1-19.el7
  • httpd24-build RHEL 3 SOFTWARE_COLLECTIONS 1.1-19.el6
  • httpd24-mod_md RHEL 3 SOFTWARE_COLLECTIONS 2.4.34-15.el7
  • httpd24-mod_ssl RHEL 3 SOFTWARE_COLLECTIONS 1:2.4.34-15.el6
  • httpd24-mod_ssl RHEL 3 SOFTWARE_COLLECTIONS 1:2.4.34-15.el7

red hat advisories RHSA-2019:4126RHSA-2020:0250RHSA-2019:3436RHSA-2019:2343

  • apache2 SLES for SAP 12 SP4, SLES for SAP 12 SP3, SLES for SAP 12 SP2 +8 more 2.4.23-29.40.1
  • apache2 SLE Module for Server Applications 15 2.4.33-3.15.1
  • apache2 SLES for SAP 12 SP1, SLES 12 SP1-LTSS 2.4.16-20.24.1
  • apache2 SLES 12-LTSS 2.4.10-14.36.1

suse advisories SUSE-SU-2019:0888-2SUSE-SU-2019:0889-1SUSE-SU-2019:0888-1SUSE-SU-2019:0878-1SUSE-SU-2019:0873-1

  • apache2 openSUSE Leap 15.0 2.4.33-lp150.2.17.1

opensuse advisories openSUSE-SU-2019:1209-1

  • apache2 Alpine 3.24, Alpine 3.23, Alpine 3.22 +16 more 2.4.39-r0

alpine advisories ALPINE-CVE-2019-0220

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • apache Arch Linux 2.4.39-1

arch linux advisories AVG-946

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-2019-0220 updated cvss 3.3

httpd: URL normalization inconsistency

  • Red Hat Enterprise Linux 5 httpd Red Hat Enterprise Linux 6 httpd, mod_ssl, httpd-tools, httpd-manual Red Hat JBoss Enterprise Web Server 2 jbcs-httpd24, jbcs-httpd24-runtime
    affected: workaround, no fix planned “This flaw can be mitigation by replacing multiple consecutive slashes, used in directives that match against the path component of the request URL with regular expressions.”
  • Red Hat Enterprise Linux AppStream (v. 8) httpd 2.4.37-16.module+el8.1.0+4134+e6bad0ed, mod_md 2.4.37-16.module+el8.1.0+4134+e6bad0ed, mod_ssl 2.4.37-16.module+el8.1.0+4134+e6bad0ed, mod_http2 1.11.3-3.module+el8.1.0+4134+e6bad0ed, mod_ldap 2.4.37-16.module+el8.1.0+4134+e6bad0ed, httpd-tools 2.4.37-16.module+el8.1.0+4134+e6bad0ed, +4 more
    fixed: vendor fix “This flaw can be mitigation by replacing multiple consecutive slashes, used in directives that match against the path component of the request URL with regular expressions.” RHSA-2019:3436
  • Red Hat Enterprise Linux Client Optional (v. 7) httpd 2.4.6-90.el7, mod_ssl 2.4.6-90.el7, mod_ldap 2.4.6-90.el7, httpd-tools 2.4.6-90.el7, mod_session 2.4.6-90.el7, httpd-manual 2.4.6-90.el7, +1 more Red Hat Enterprise Linux ComputeNode Optional (v. 7) httpd 2.4.6-90.el7, mod_ssl 2.4.6-90.el7, mod_ldap 2.4.6-90.el7, httpd-tools 2.4.6-90.el7, mod_session 2.4.6-90.el7, httpd-manual 2.4.6-90.el7, +1 more Red Hat Enterprise Linux Server (v. 7) httpd 2.4.6-90.el7, mod_ssl 2.4.6-90.el7, httpd-tools 2.4.6-90.el7, mod_session 2.4.6-90.el7, httpd-manual 2.4.6-90.el7 Red Hat Enterprise Linux Server Optional (v. 7) mod_ldap 2.4.6-90.el7, mod_proxy_html 2.4.6-90.el7 Red Hat Enterprise Linux Workstation (v. 7) httpd 2.4.6-90.el7, mod_ssl 2.4.6-90.el7, httpd-tools 2.4.6-90.el7, mod_session 2.4.6-90.el7, httpd-manual 2.4.6-90.el7 Red Hat Enterprise Linux Workstation Optional (v. 7) mod_ldap 2.4.6-90.el7, mod_proxy_html 2.4.6-90.el7
    fixed: vendor fix “This flaw can be mitigation by replacing multiple consecutive slashes, used in directives that match against the path component of the request URL with regular expressions.” RHSA-2019:2343
  • Red Hat JBoss Core Services
    fixed: vendor fix “This flaw can be mitigation by replacing multiple consecutive slashes, used in directives that match against the path component of the request URL with regular expressions.” RHSA-2020:0251
  • Red Hat JBoss Core Services on RHEL 6 Server jbcs-httpd24-apr 1.6.3-73.jbcs.el6, jbcs-httpd24-brotli 1.0.6-9.jbcs.el6, jbcs-httpd24-curl 7.64.1-21.jbcs.el6, jbcs-httpd24-httpd 2.4.37-41.jbcs.el6, jbcs-httpd24-jansson 2.11-24.jbcs.el6, jbcs-httpd24-mod_md 2.0.8-10.jbcs.el6, +26 more Red Hat JBoss Core Services on RHEL 7 Server jbcs-httpd24-apr 1.6.3-73.jbcs.el7, jbcs-httpd24-brotli 1.0.6-9.jbcs.el7, jbcs-httpd24-curl 7.64.1-21.jbcs.el7, jbcs-httpd24-httpd 2.4.37-41.jbcs.el7, jbcs-httpd24-jansson 2.11-24.jbcs.el7, jbcs-httpd24-mod_md 2.0.8-10.jbcs.el7, +26 more
    fixed: vendor fix “This flaw can be mitigation by replacing multiple consecutive slashes, used in directives that match against the path component of the request URL with regular expressions.” RHSA-2020:0250
  • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) httpd24 1.1-19.el6, httpd24-build 1.1-19.el6, httpd24-runtime 1.1-19.el6, httpd24-httpd 2.4.34-15.el6, httpd24-nghttp2 1.7.1-8.el6, httpd24-scldevel 1.1-19.el6, +7 more Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) httpd24 1.1-19.el7, httpd24-runtime 1.1-19.el7, httpd24-httpd 2.4.34-15.el7, httpd24-nghttp2 1.7.1-8.el7, httpd24-scldevel 1.1-19.el7, httpd24-mod_md 2.4.34-15.el7, +7 more Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5) httpd24 1.1-19.el7, httpd24-runtime 1.1-19.el7, httpd24-httpd 2.4.34-15.el7, httpd24-nghttp2 1.7.1-8.el7, httpd24-scldevel 1.1-19.el7, httpd24-mod_md 2.4.34-15.el7, +7 more Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) httpd24 1.1-19.el7, httpd24-runtime 1.1-19.el7, httpd24-httpd 2.4.34-15.el7, httpd24-nghttp2 1.7.1-8.el7, httpd24-scldevel 1.1-19.el7, httpd24-mod_md 2.4.34-15.el7, +7 more Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7) httpd24 1.1-19.el7, httpd24-runtime 1.1-19.el7, httpd24-httpd 2.4.34-15.el7, httpd24-nghttp2 1.7.1-8.el7, httpd24-scldevel 1.1-19.el7, httpd24-mod_md 2.4.34-15.el7, +7 more Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) httpd24 1.1-19.el6, httpd24-build 1.1-19.el6, httpd24-runtime 1.1-19.el6, httpd24-httpd 2.4.34-15.el6, httpd24-nghttp2 1.7.1-8.el6, httpd24-scldevel 1.1-19.el6, +7 more
    +1 more products
    Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) httpd24 1.1-19.el7, httpd24-runtime 1.1-19.el7, httpd24-httpd 2.4.34-15.el7, httpd24-nghttp2 1.7.1-8.el7, httpd24-scldevel 1.1-19.el7, httpd24-mod_md 2.4.34-15.el7, +7 more
    fixed: vendor fix “This flaw can be mitigation by replacing multiple consecutive slashes, used in directives that match against the path component of the request URL with regular expressions.” RHSA-2019:4126
  • Red Hat Virtualization 4 rhvm-appliance
    not affected: vulnerable code not present

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

17.86% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 5.3 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:P/I:N/A:N

Affected products

  • Apache Software Foundation Apache HTTP Server

Classification

Weakness
  • CWE-706 Use of Incorrectly-Resolved Name or Reference
Technology feeds

References

Sources

Fencer Vulns 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.