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Date: Fri, 26 Aug 2011 15:14:33 -0500
From: Jamie Strandboge <jamie@...onical.com>
To: geoff@...ttered.org, dwyer@...lab.ee.mu.oz.au, jgifford@...ksmart.net
Cc: oss-security@...ts.openwall.com, security@...ntu.com
Subject: Security issue in hammerhead
A security bug was reported against hammerhead in Ubuntu. You are being
emailed as the upstream contact. Please keep
oss-security@...ts.openwall.com[1] CC'd for any updates on this issue.
This issue should be considered public and has not yet been assigned a CVE.
Details from the public bug follow:
https://launchpad.net/bugs/826679
----
From the reporter:
"hammerhead blindly writes to to /tmp/hammer.log without prior checks.
It is possible to put a symbolic link at /tmp/hammer.log pointing at
another file - that hammerhead will then end up appending data into.
(it appears that hammerhead uses the file location as specified
in /etc/hammerhead/hh.conf - which in debian/ubuntu
is /tmp/hammer.log)."
----
A quick check shows that HH_LOG and REPORT_LOG are indeed being
unconditionally opened with 'fopen(..., "a+")' in src/hammerhead.cc.
Thanks in advance for your cooperation in coordinating a fix for this
issue,
Jamie Strandboge
[1] oss-security@...ts.openwall.com is a public mailing list for
people to collaborate on security vulnerabilities and coordinate
security updates.
PS - I couldn't find a security contact for hammerhead, so emailed to
those I could find in AUTHORS.
--
Jamie Strandboge | http://www.canonical.com
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