ProFTPD off-by-one _xlate_ascii_write function buffer overflow

proftpd-offbyone-bo (15387) The risk level is classified as HighHigh Risk

Description:

ProFTPD is vulnerable to a buffer overflow, caused by off-by-one errors in the _xlate_ascii_write function. By issuing a specially-crafted RETR command containing 1023 bytes or more that begins with a LF (Line Feed) character, a remote attacker could overflow a buffer and execute arbitrary code on the system with the privileges of ProFTPD.


Consequences:

Gain Access

Remedy:

Upgrade to the latest version of ProFTPD (1.2.9rc3 or later), available from the ProFTPD Web site. See References.

References:

  • ProFTPD Web site: The ProFTPD Project: Downloading and mirror sites.
  • BID-9782: ProFTPD _xlate_ascii_write() Buffer Overrun Vulnerability
  • CVE-2004-0346: Off-by-one buffer overflow in _xlate_ascii_write() in ProFTPD 1.2.7 through 1.2.9rc2p allows local users to gain privileges via a 1024 byte RETR command.
  • OSVDB ID: 4134: ProFTPD in_xlate_ascii_write() Function RETR Command Remote Overflow

Platforms Affected:

  • ProFTPD ProFTPD 1.2.7
  • ProFTPD ProFTPD 1.2.8
  • ProFTPD ProFTPD 1.2.9 rc1
  • ProFTPD ProFTPD 1.2.9 rc2
  • Turbolinux Turbolinux 7 Server
  • Turbolinux Turbolinux 7 Workstation
  • Turbolinux Turbolinux 8 Server
  • Turbolinux Turbolinux 8 Workstation
  • Turbolinux Turbolinux Appliance Server 1.0 Workgroup Ed

Reported:

Mar 04, 2004

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