----------------------------------------------------------------------


Secunia Research and vulnerability disclosures coordinated by Secunia:

http://secunia.com/research/


----------------------------------------------------------------------

TITLE:
Pure-FTPd "STARTTLS" Plaintext Injection Vulnerability

SECUNIA ADVISORY ID:
SA43988

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/43988/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=43988

RELEASE DATE:
2011-04-02

DISCUSS ADVISORY:
http://secunia.com/advisories/43988/#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/43988/

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=43988

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:
A vulnerability has been reported in Pure-FTPd, which can be
exploited by malicious people to manipulate certain data.

The vulnerability is caused due to the TLS implementation not
properly clearing transport layer buffers when upgrading from
plaintext to ciphertext after receiving the "STARTTLS" command. This
can be exploited to insert arbitrary plaintext data (e.g. FTP
commands) during the plaintext phase, which will then be executed
after upgrading to the TLS ciphertext phase.

The vulnerability is reported in versions prior to 1.0.30.

SOLUTION:
Update to version 1.0.30.

PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.

ORIGINAL ADVISORY:
http://www.pureftpd.org/project/pure-ftpd/news

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/

----------------------------------------------------------------------

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.

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

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

----------------------------------------------------------------------

Unsubscribe: Secunia Security Advisories
http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org

----------------------------------------------------------------------