Cyrus IMAP Server: Multiple overflow vulnerabilities

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200502-29 / cyrus-imapd
Release Date	February 23, 2005
Latest Revision	May 22, 2006: 02
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
net-mail/cyrus-imapd	< 2.2.12	>= 2.2.12	All supported architectures

Related bugreports: #82404

Synopsis

The Cyrus IMAP Server is affected by several overflow vulnerabilities which could potentially lead to the remote execution of arbitrary code.

2. Impact Information

Background

The Cyrus IMAP Server is an efficient, highly-scalable IMAP e-mail server.

Description

Possible single byte overflows have been found in the imapd annotate extension and mailbox handling code. Furthermore stack buffer overflows have been found in fetchnews, the backend and imapd.

Impact

An attacker, who could be an authenticated user or an admin of a peering news server, could exploit these vulnerabilities to execute arbitrary code with the rights of the user running the Cyrus IMAP Server.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All Cyrus IMAP Server users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-mail/cyrus-imapd-2.2.12"

4. References

Updated February 23, 2005

Summary: This is a Gentoo Linux Security Advisory

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