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TITLE:
Eserv/3 IMAP and HTTP Server Multiple Vulnerabilities

SECUNIA ADVISORY ID:
SA20059

VERIFY ADVISORY:
http://secunia.com/advisories/20059/

CRITICAL:
Moderately critical

IMPACT:
Security Bypass, Exposure of sensitive information

WHERE:
>From remote

SOFTWARE:
EServ 3.x
http://secunia.com/product/10236/

DESCRIPTION:
Secunia Research has discovered some vulnerabilities in Eserv/3,
which can be exploited by malicious users to bypass certain security
restrictions and to disclose potentially sensitive information, and
by malicious people to gain access to potentially sensitive
information.

1) Directory traversal errors exist in the CREATE, SELECT, DELETE,
RENAME, COPY and APPEND commands of the IMAP service. This can be
exploited by an authenticated user to read other users' emails,
create/rename arbitrary directories on the system, and delete empty
directories.

2) A validation error of the filename extension supplied by the user
in the URL can be exploited to retrieve the source code of script
files (e.g. PHP, PL) from the HTTP server via specially crafted
requests containing dot, space and slash characters.

The vulnerabilities have been confirmed in version 3.25. Prior
versions may also be affected.

SOLUTION:
Update to version 3.26 or apply patch.
http://www.eserv.ru/download/EservEproxy326a-setup.exe

Patch for version 3.25:
http://www.eserv.ru/download/Eserv325-fix.zip

PROVIDED AND/OR DISCOVERED BY:
Tan Chew Keong, Secunia Research.

ORIGINAL ADVISORY:
EServ:
http://www.eserv.ru/ru/news/news_detail.php?ID=235

Secunia Research:
http://secunia.com/secunia_research/2006-37/

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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