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TITLE:
freeSSHd SFTP Directory Buffer Overflow Vulnerability

SECUNIA ADVISORY ID:
SA30498

VERIFY ADVISORY:
http://secunia.com/advisories/30498/

CRITICAL:
Moderately critical

IMPACT:
DoS, System access

WHERE:
>From remote

SOFTWARE:
freeSSHd 1.x
http://secunia.com/product/9607/

DESCRIPTION:
securfrog has discovered a vulnerability in freeSSHd, which can be
exploited by malicious users to compromise a vulnerable system.

The vulnerability is caused due to a boundary error in the processing
of SFTP commands. This can be exploited to cause a stack-based buffer
overflow via an SFTP command requesting a directory with an overly
long name.

Successful exploitation allows execution of arbitrary code, but
requires that the attacker has SFTP access to the server.

The vulnerability is confirmed in version 1.2.1. Other versions may
also be affected.

SOLUTION:
Restrict access to trusted users only.

PROVIDED AND/OR DISCOVERED BY:
securfrog

ORIGINAL ADVISORY:
http://milw0rm.com/exploits/5709

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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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