Bug 1032266 (CVE-2013-4547) - CVE-2013-4547 nginx: security restriction bypass flaw due to whitespace parsing
Summary: CVE-2013-4547 nginx: security restriction bypass flaw due to whitespace parsing
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2013-4547
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1032267 1032269 1032270
Blocks:
TreeView+ depends on / blocked
 
Reported: 2013-11-19 21:10 UTC by Vincent Danen
Modified: 2020-11-05 10:33 UTC (History)
10 users (show)

Fixed In Version: nginx 1.5.7, nginx 1.4.4
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2014-12-18 21:20:11 UTC
Embargoed:

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Description Vincent Danen 2013-11-19 21:10:01 UTC 
It was reported [1] that nginx suffered from a flaw where an attacker could bypass security restrictions in certain configurations due to how the HTTP request parser handled URI's with an unescaped space character.

This problem affects nginx 0.8.41 through to 1.5.6; new 1.5.7 and 1.4.4 releases are available to correct this.  A patch [2] also exists for older versions.

As a temporary workaround the following configuration can be used in each server{} block:

    if ($request_uri ~ " ") {
        return 444;
    } 

[1] http://mailman.nginx.org/pipermail/nginx-announce/2013/000125.html
[2] http://nginx.org/download/patch.2013.space.txt
Comment 1 Vincent Danen 2013-11-19 21:11:41 UTC 
Created nginx tracking bugs for this issue:

Affects: fedora-all [bug 1032267]
Affects: epel-5 [bug 1032269]
Affects: epel-6 [bug 1032270]
Comment 3 Fedora Update System 2013-12-02 09:36:29 UTC 
nginx-1.4.4-1.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 4 Fedora Update System 2013-12-14 03:27:58 UTC 
nginx-1.4.4-1.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 5 Fedora Update System 2014-11-30 19:13:44 UTC 
nginx-0.8.55-6.el5 has been pushed to the Fedora EPEL 5 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 6 Fedora Update System 2014-11-30 19:20:32 UTC 
nginx-1.0.15-11.el6 has been pushed to the Fedora EPEL 6 stable repository.  If problems still persist, please make note of it in this bug report.
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