glFTPd: Local buffer overflow vulnerability

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200409-27 / glftpd
Release Date	September 21, 2004
Latest Revision	September 21, 2004: 01
Impact	normal
Exploitable	local

Package	Vulnerable versions	Unaffected versions	Architecture(s)
net-ftp/glftpd	< 1.32-r1	>= 1.32-r1	All supported architectures

Related bugreports: #64809

Synopsis

glFTPd is vulnerable to a local buffer overflow which may allow arbitrary code execution.

2. Impact Information

Background

glFTPd is a highly configurable FTP server with many features.

Description

The glFTPd server is vulnerable to a buffer overflow in the 'dupescan' program. This vulnerability is due to an unsafe strcpy() call which can cause the program to crash when a large argument is passed.

Impact

A local user with malicious intent can pass a parameter to the dupescan program that exceeds the size of the buffer, causing it to overflow. This can lead the program to crash, and potentially allow arbitrary code execution with the permissions of the user running glFTPd, which could be the root user.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All glFTPd users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge sync
# emerge -pv ">=net-ftp/glftpd-1.32-r1"
# emerge ">=net-ftp/glftpd-1.32-r1"

4. References

Page updated September 21, 2004

Summary: This is a Gentoo Linux Security Advisory

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