Bug 1695036 (CVE-2019-0220) - CVE-2019-0220 httpd: URL normalization inconsistency
Summary: CVE-2019-0220 httpd: URL normalization inconsistency
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2019-0220
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact: Maryna Nalbandian
URL:
Whiteboard:
Depends On: 1695046 1696095 1696096 1696097
Blocks: 1694984
TreeView+ depends on / blocked
 
Reported: 2019-04-02 11:06 UTC by Dhananjay Arunesh
Modified: 2021-02-16 22:09 UTC (History)
32 users (show)

Fixed In Version: httpd 2.4.39
Doc Type: If docs needed, set a value
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Clone Of:
Environment:
Last Closed: 2019-08-06 19:20:54 UTC
Embargoed:

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2019:2343 0 None None None 2019-08-06 12:42:40 UTC
Red Hat Product Errata RHSA-2019:3436 0 None None None 2019-11-05 20:54:56 UTC
Red Hat Product Errata RHSA-2019:4126 0 None None None 2019-12-10 07:57:18 UTC
Red Hat Product Errata RHSA-2020:0250 0 None None None 2020-01-27 21:21:13 UTC
Red Hat Product Errata RHSA-2020:0251 0 None None None 2020-01-27 21:20:18 UTC

Description Dhananjay Arunesh 2019-04-02 11:06:57 UTC 
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.
Comment 1 Dhananjay Arunesh 2019-04-02 11:07:46 UTC 
External References:

https://httpd.apache.org/security/vulnerabilities_24.html
http://www.apache.org/dist/httpd/CHANGES_2.4
Comment 2 Dhananjay Arunesh 2019-04-02 11:32:57 UTC 
Created httpd tracking bugs for this issue:

Affects: fedora-all [bug 1695046]
Comment 7 Huzaifa S. Sidhpurwala 2019-05-15 09:40:59 UTC 
Statement:

Red Hat Enterprise Linux 6 is now in Maintenance Support 2 Phase of the support and maintenance life cycle. This flaw has been rated as having a security impact of Low, and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.
Comment 15 Dhananjay Arunesh 2019-05-22 06:22:05 UTC 
Mitigation:

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.
Comment 19 errata-xmlrpc 2019-08-06 12:42:38 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2019:2343 https://access.redhat.com/errata/RHSA-2019:2343
Comment 20 Product Security DevOps Team 2019-08-06 19:20:54 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2019-0220
Comment 22 errata-xmlrpc 2019-11-05 20:54:54 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2019:3436 https://access.redhat.com/errata/RHSA-2019:3436
Comment 23 errata-xmlrpc 2019-12-10 07:57:16 UTC 
This issue has been addressed in the following products:

  Red Hat Software Collections for Red Hat Enterprise Linux 6
  Red Hat Software Collections for Red Hat Enterprise Linux 7
  Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUS

Via RHSA-2019:4126 https://access.redhat.com/errata/RHSA-2019:4126
Comment 24 errata-xmlrpc 2020-01-27 21:20:16 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Core Services

Via RHSA-2020:0251 https://access.redhat.com/errata/RHSA-2020:0251
Comment 25 errata-xmlrpc 2020-01-27 21:21:11 UTC 
This issue has been addressed in the following products:

  JBoss Core Services on RHEL 6
  JBoss Core Services on RHEL 7

Via RHSA-2020:0250 https://access.redhat.com/errata/RHSA-2020:0250
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