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Date: Mon, 27 May 2013 12:01:27 -0600
From: Kurt Seifried <kseifried@...hat.com>
To: oss-security@...ts.openwall.com
CC: Jan Lieskovsky <jlieskov@...hat.com>,
        "Jason A. Donenfeld" <Jason@...c4.com>, cgit@...ts.zx2c4.com
Subject: Re: CVE Request: cgit directory traversal

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On 05/27/2013 06:30 AM, Jan Lieskovsky wrote:
> Thank you for the report, Jason.
> 
>> Hi Kurt,
>> 
>> As mentioned in early messages to oss-sec, I've inherited 
>> maintainership of the cgit codebase and am gradually auditing
>> it. Today I found a nasty directory traversal:
>> 
>> http://somehost/?url=/somerepo/about/../../../../etc/passwd
>> 
>> This should be pretty straightforward to categorize.
>> 
>> Exploitation looks like: 
>> http://data.zx2c4.com/cgit-directory-traversal.png
>> 
>> I've committed a fix for it here: 
>> http://git.zx2c4.com/cgit/commit/?h=wip&id=babf94e04e74123eb658a823213c062663cdadd6
>
>> 
> That patch doesn't seem to be applicable to cgit-0.9.1 version yet
> (there doesn't seem to be cgit_parse_readme() routine yet).
> 
> Can you provide a patch that would apply against v0.9.1 version
> too? Or would this be just problem of master branch code?
> 
> Thank you && Regards, Jan. -- Jan iankko Lieskovsky / Red Hat
> Security Response Team
> 
>> 
>> And this fix will be in the master branch and a new release will
>> be made soon.
>> 
>> Cgit by default is not vulnerable to this, and the vulnerability
>> only exists when a user has configured cgit to use a readme file
>> from a filesystem filepath instead of from the git repo itself.
>> Until a release is made, administrators are urged to disable
>> reading the readme file from a filepath, if currently enabled.
>> 
>> Thanks, Jason
>> 

Please use CVE-2013-2117 for this issue.

- -- 
Kurt Seifried Red Hat Security Response Team (SRT)
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