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TITLE:
ProFTPD Directory Traversal and Buffer Overflow Vulnerabilities

SECUNIA ADVISORY ID:
SA42052

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/42052/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=42052

RELEASE DATE:
2010-11-02

DISCUSS ADVISORY:
http://secunia.com/advisories/42052/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
 * Last Update
 * Popularity
 * Comments
 * Criticality Level
 * Impact
 * Where
 * Solution Status
 * Operating System / Software
 * CVE Reference(s)

http://secunia.com/advisories/42052/

ONLY AVAILABLE IN CUSTOMER AREA:
 * Authentication Level
 * Report Reliability
 * Secunia PoC
 * Secunia Analysis
 * Systems Affected
 * Approve Distribution
 * Remediation Status
 * Secunia CVSS Score
 * CVSS

https://ca.secunia.com/?page=viewadvisory&vuln_id=42052

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
 * AUTOMATED SCANNING

http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/

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) The vendor credits an anonymous person via ZDI.
2) The vendor credits an anonymous person via SecuriTeam Secure
Disclosure program.

ORIGINAL ADVISORY:
http://www.proftpd.org/docs/NEWS-1.3.3c

1) http://bugs.proftpd.org/show_bug.cgi?id=3521
2) http://bugs.proftpd.org/show_bug.cgi?id=3519

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

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

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