03 November 2010
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2010.0999 ProFTPD TELNET_IAC Remote Code Execution Vulnerability 3 November 2010 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: ProFTPD Publisher: Zero Day Initiative Operating System: UNIX variants (UNIX, Linux, OSX) Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Resolution: Patch/Upgrade Original Bulletin: http://www.zerodayinitiative.com/advisories/ZDI-10-229/ - --------------------------BEGIN INCLUDED TEXT-------------------- ProFTPD TELNET_IAC Remote Code Execution Vulnerability ZDI-10-229: November 2nd, 2010 CVSS Score 10, (AV:N/AC:L/Au:N/C:C/I:C/A:C) Affected Vendors ProFTPD Affected Products FTP Server Vulnerability Details This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of ProFTPD. Authentication is not required to exploit this vulnerability. The flaw exists within the proftpd server component which listens by default on TCP port 21. When reading user input if a TELNET_IAC escape sequence is encountered the process miscalculates a buffer length counter value allowing a user controlled copy of data to a stack buffer. A remote attacker can exploit this vulnerability to execute arbitrary code under the context of the proftpd process. Vendor Response ProFTPD states: Patch committed to CVS with accompanying regression test, and backported to 1.3.3 branch. Disclosure Timeline 2010-09-24 - Vulnerability reported to vendor 2010-11-02 - Coordinated public release of advisory Credit This vulnerability was discovered by: Anonymous - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to email@example.com and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: firstname.lastname@example.org Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iD8DBQFM0NfY/iFOrG6YcBERArQpAKDDjLJSlQCdLwAOTjmmesJUr5Q1EACg1IBN paGK6anluCzFkJG1BPHCp2w= =Mzyi -----END PGP SIGNATURE-----