Qpopper: Multiple Vulnerabilities

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200505-17 / qpopper
Release Date	May 23, 2005
Latest Revision	May 23, 2005: 01
Impact	normal
Exploitable	local

Package	Vulnerable versions	Unaffected versions	Architecture(s)
net-mail/qpopper	< 4.0.5-r3	>= 4.0.5-r3	All supported architectures

Related bugreports: #90622

Synopsis

Qpopper contains two vulnerabilities allowing an attacker to overwrite arbitrary files and create files with insecure permissions.

2. Impact Information

Background

Qpopper is a widely used server for the POP3 protocol.

Description

Jens Steube discovered that Qpopper doesn't drop privileges to process local files from normal users (CAN-2005-1151). The upstream developers discovered that Qpopper can be forced to create group or world writeable files (CAN-2005-1152).

Impact

A malicious local attacker could exploit Qpopper to overwrite arbitrary files as root or create new files which are group or world writeable.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All Qpopper users should upgrade to the latest available version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-mail/qpopper-4.0.5-r3"

4. References

Updated May 23, 2005

Summary: This is a Gentoo Linux Security Advisory

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