Dovecot Invalid Message Address Parsing Denial of Service Vulnerability

BID:31997

Info

Dovecot Invalid Message Address Parsing Denial of Service Vulnerability

Bugtraq ID: 31997
Class: Input Validation Error
CVE: CVE-2008-4907
Remote: Yes
Local: No
Published: Oct 30 2008 12:00AM
Updated: Dec 16 2008 01:02AM
Credit: This issue was disclosed by the vendor.
Vulnerable: Ubuntu Ubuntu Linux 8.10 sparc
Ubuntu Ubuntu Linux 8.10 powerpc
Ubuntu Ubuntu Linux 8.10 lpia
Ubuntu Ubuntu Linux 8.10 i386
Ubuntu Ubuntu Linux 8.10 amd64
Pardus Linux 2008 0
Gentoo Linux
Dovecot Dovecot 1.1.5
Dovecot Dovecot 1.1.4
Not Vulnerable: Dovecot Dovecot 1.1.6

Discussion

Dovecot Invalid Message Address Parsing Denial of Service Vulnerability

Dovecot is prone to a remote denial-of-service vulnerability because it fails to handle certain specially crafted email headers.

An attacker can exploit this issue to prevent recipients from accessing their mailboxes.

For an exploit to succeed, the IMAP client connecting to Dovecot must use the FETCH ENVELOPE command.

The issue affects Dovecot 1.1.4 and 1.1.5.

Exploit / POC

Dovecot Invalid Message Address Parsing Denial of Service Vulnerability

The following invalid message address header is sufficient to trigger this issue:

"From: ("

Solution / Fix

Dovecot Invalid Message Address Parsing Denial of Service Vulnerability

Solution:
The vendor has released updates. Please see the references for more information.


Ubuntu Ubuntu Linux 8.10 lpia

Ubuntu Ubuntu Linux 8.10 sparc

Ubuntu Ubuntu Linux 8.10 powerpc

Ubuntu Ubuntu Linux 8.10 i386

Ubuntu Ubuntu Linux 8.10 amd64

Dovecot Dovecot 1.1.4

Dovecot Dovecot 1.1.5

References

Dovecot Invalid Message Address Parsing Denial of Service Vulnerability

References:

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