TITLE:
ELOG Format String and Directory Traversal Vulnerabilities

SECUNIA ADVISORY ID:
SA18533

VERIFY ADVISORY:
http://secunia.com/advisories/18533/

CRITICAL:
Highly critical

IMPACT:
Security Bypass, DoS, System access

WHERE:
>From remote

SOFTWARE:
ELOG 2.x
http://secunia.com/product/4657/

DESCRIPTION:
Some vulnerabilities have been reported in ELOG, which can be
exploited by malicious people to cause a DoS (Denial of Service),
bypass certain security restrictions, and potentially compromise a
vulnerable system.

1) A format string error exists in the "write_logfile()" function in
elogd.c when logging events to the log file. This can be exploited to
crash the server and may allow arbitrary code execution via a
specially-crafted username submitted from the login page.

Successful exploitation requires that logging is enabled.

2) An error in the validation of certain URLs may be exploited to
access files from outside of the elog directory via requests
containing the "../.." sequence in a directory traversal attack.

The vulnerabilities have been reported in versions prior to 2.6.1.

NOTE: Several other unspecified issues, which may be security
related, have also been fixed.

SOLUTION:
Update to version 2.6.1.
http://midas.psi.ch/elog/download.html

PROVIDED AND/OR DISCOVERED BY:
Reported by vendor.

ORIGINAL ADVISORY:
http://midas.psi.ch/elog/download/ChangeLog

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