ProFTPD ASCII File Transfer Buffer Overrun Vulnerability

BID:8679

Info

ProFTPD ASCII File Transfer Buffer Overrun Vulnerability

Bugtraq ID: 8679
Class: Boundary Condition Error
CVE: CVE-2003-0831
Remote: Yes
Local: No
Published: Sep 23 2003 12:00AM
Updated: Jul 11 2009 11:56PM
Credit: Discovery is credited to Mark Dowd of ISS X-Force.
Vulnerable: Sun Cobalt RaQ XTR
ProFTPD Project ProFTPD 1.2.9 rc2
ProFTPD Project ProFTPD 1.2.9 rc1
ProFTPD Project ProFTPD 1.2.8 rc2
ProFTPD Project ProFTPD 1.2.8 rc1
ProFTPD Project ProFTPD 1.2.8
+ Slackware Linux 9.0
+ Slackware Linux 8.1
+ Slackware Linux -current
 ProFTPD Project ProFTPD 1.2.7 rc3
ProFTPD Project ProFTPD 1.2.7 rc2
ProFTPD Project ProFTPD 1.2.7 rc1
ProFTPD Project ProFTPD 1.2.7
+ Sun Cobalt Qube 3
Not Vulnerable: ProFTPD Project ProFTPD 1.2.9 rc3
ProFTPD Project ProFTPD 1.2.9
+ Mandriva Linux Mandrake 10.0
+ OpenPKG OpenPKG 2.0
+ OpenPKG OpenPKG 1.3
+ OpenPKG OpenPKG Current
 + Slackware Linux 9.1
+ Slackware Linux 9.0
+ Slackware Linux 8.1
+ Slackware Linux -current

Discussion

ProFTPD ASCII File Transfer Buffer Overrun Vulnerability

A remotely exploitable buffer overrun vulnerability has been reported in ProFTPD. This issue could be triggered if an attacker uploads a malformed file and then that file is downloaded in ASCII mode. Successful exploitation will permit a malicious FTP user with upload access to execute arbitrary code in the context of the FTP server.

It is also reported that ProFTPD does not adequately drop privileges in some circumstances, which may compound the risks associated with exploitation.

This issue could also affect versions prior to 1.2.7, though this has not been confirmed.

Exploit / POC

Solution / Fix

ProFTPD ASCII File Transfer Buffer Overrun Vulnerability

Solution:
The vendor has stated that patched versions of ProFTPD 1.2.7 through 1.2.9rc2 have been made available. These patched versions can be obtained from the vendor through various mirrors and are denoted with a 'p' after the version number, for example:

proftpd-1.2.7p.tar.gz

Sun have released a security update to address this issue in the RAQ XTR. Please see references section for further details. A fix is linked below.

Slackware has released fixes to address this issue.

OpenPKG updates are available. See advisory OpenPKG-SA-2003.043.

Mandrake has issued fixes listed in advisory MDKSA-2003:095. **UPDATE: On Dec 31, 2003 Mandrake released new fixes correcting a bug in the patched version of ProFTPD.

Trustix has issued fixes for Trustix Secure Linux. See advisory TSLSA-2003-0037 in the reference section.

GENTOO has released an advisory 200309-16 and fix information to address this issue. Please see the referenced advisory for more information.

Conectiva has released advisory CLA-2003:750 to address this issue.

Turbolinux has released an advisory TLSA-2003-54 and fix information to address this issue. Please see the referenced advisory for more information.

ProFTPD versions 1.2.9 and 1.2.9rc3 have been released which are not prone to this issue. Users are advised to obtain the fixes.

Sun has released a fix for the Qube3.


Sun Cobalt RaQ XTR

ProFTPD Project ProFTPD 1.2.7

ProFTPD Project ProFTPD 1.2.7 rc2

ProFTPD Project ProFTPD 1.2.7 rc3

ProFTPD Project ProFTPD 1.2.7 rc1

ProFTPD Project ProFTPD 1.2.8

ProFTPD Project ProFTPD 1.2.8 rc1

ProFTPD Project ProFTPD 1.2.8 rc2

ProFTPD Project ProFTPD 1.2.9 rc1

ProFTPD Project ProFTPD 1.2.9 rc2

References

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