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Insecure Library Loading
Highly critical

ProFTPD Directory Traversal and Buffer Overflow Vulnerabilities

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Release Date:  2010-11-01    Last Update:  2010-11-11    Views:  10,022

Secunia Advisory SA42052

Where:

From remote

Impact:

Security Bypass, Manipulation of data, System access

Solution Status:

Vendor Patch

Software:

CVE Reference(s):

Description


Two vulnerabilities have been reported in ProFTPD, which can be exploited by malicious users to manipulate certain data and malicious people to compromise a vulnerable system.

1) A logic error within the "pr_netio_telnet_gets()" function in src/netio.c when processing user input containing the Telnet IAC (Interpret As Command) escape sequence can be exploited to cause a stack-based buffer overflow by sending specially crafted input to the FTP or FTPS service.

Successful exploitation may allow execution of arbitrary code.

2) An input validation error within the "mod_site_misc" module can be exploited to e.g. create and delete directories, create symlinks, and change the time of files located outside a writable directory.

Successful exploitation requires that ProFTPD is compiled with the "mod_site_misc" module and the attacker has write access to a directory.


Solution:
Update to version 1.3.3c.

Provided and/or discovered by:
1) An anonymous person via ZDI.
2) The vendor credits an anonymous person via SecuriTeam Secure Disclosure program.

Original Advisory:
ProFTPD.org:
http://www.proftpd.org/docs/NEWS-1.3.3c
http://bugs.proftpd.org/show_bug.cgi?id=3521
http://bugs.proftpd.org/show_bug.cgi?id=3519

ZDI:
http://www.zerodayinitiative.com/advisories/ZDI-10-229/

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: ProFTPD Directory Traversal and Buffer Overflow Vulnerabilities

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