Bug 757181 - (CVE-2011-4350) CVE-2011-4350 yaws: Directory traversal flaw
CVE-2011-4350 yaws: Directory traversal flaw
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
: Security
Depends On: 757183 757184
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Reported: 2011-11-25 12:36 EST by Jan Lieskovsky
Modified: 2012-04-02 21:03 EDT (History)
3 users (show)

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Doc Type: Bug Fix
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Description Jan Lieskovsky 2011-11-25 12:36:21 EST
A directory traversal flaw was found in the way yaws, web server for dynamic content written in Erlang, processed certain URLs. A remote, authenticated yaws user could use this flaw to obtain content of arbitrary local file, available to the yaws server user via specially-crafted URL request.

[1] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=650009
[2] https://github.com/klacke/yaws/issues/69
Comment 1 Jan Lieskovsky 2011-11-25 12:42:11 EST
Public PoC from [1]:

curl 'http://localhost:8080/..\\..\\..\\..\\/etc/passwd'

I am not sure, versions of yaws, as shipped in Fedora release of 14, 15, and 16, and as shipped with Fedora EPEL 6, are affected by this issue. Have tried above PoC (and couple of its combinations), but was unsuccessful to reproduce the issue (even with 'auth' disabled).
Comment 2 Jan Lieskovsky 2011-11-25 12:42:46 EST
CVE request:
[3] http://www.openwall.com/lists/oss-security/2011/11/25/5
Comment 3 Jan Lieskovsky 2011-11-25 12:43:46 EST
Created yaws tracking bugs for this issue

Affects: fedora-all [bug 757183]
Affects: epel-6 [bug 757184]
Comment 4 Peter Lemenkov 2011-11-25 14:30:04 EST
I'll take a closer look tomorrow on this issue.
Comment 5 Kurt Seifried 2011-11-25 15:36:24 EST
We don't appear to have fixed CVE-2010-4181 (similar issue, directory traversal)?
Comment 6 Vincent Danen 2011-11-28 13:29:56 EST
This was assigned CVE-2011-4350:


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