UW-IMAP vulnerable to a buffer overflow

Overview

UW-IMAP contains a buffer overflow vulnerability that may allow a remote, authenticated attacker to execute arbitrary code on a vulnerable system.

Description

The University of Washington IMAP Server (UW-IMAP) is an email server that uses the Internet Message Access Protocol (lMAP). A lack of validation on user-controlled data supplied to the UW-IMAP Server may allow a buffer overflow to occur. The UW-IMAP Server expects mailbox names enclosed with quote characters ("). If a remote attacker supplies the UW-IMAP server with a mailbox name that begins with a quote character but does not have a closing quote character, the server will continue to read data until an end quote character is reached. This may overrun the buffer meant to contain the mailbox name and overwrite the stack with attacker-controlled data.

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Impact

A remote, authenticated attacker may be able to execute arbitrary code on a vulnerable system.

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Solution

Upgrade

This vulnerability is fixed in UW-IMAP maintenance release imap-2004g.

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Vendor Information

933601

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Red Hat, Inc. __ Affected

Updated: December 20, 2005

Status

Affected

Vendor Statement

This issue affects the imap package as shipped with Red Hat Enterprise Linux 2.1 and 3, and the libc-client package as shipped with Red Hat Enterprise Linux 4. Updated packages to correct this issue are available along with our advisories at the URLs below. Users of the Red Hat Network can update their systems using the ‘up2date’ tool.

Red Hat Enterprise Linux 4:

<http://rhn.redhat.com/errata/RHSA-2005-848.html&gt;

Red Hat Enterprise Linux 3, 2.1:

<http://rhn.redhat.com/errata/RHSA-2005-850.html&gt;.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

Please see:

<http://rhn.redhat.com/errata/RHSA-2005-848.html&gt; and <http://rhn.redhat.com/errata/RHSA-2005-850.html&gt;

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23933601 Feedback>).

University of Washington __ Affected

Updated: October 17, 2005

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

Please see <http://www.washington.edu/imap/documentation/RELNOTES.html&gt;

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23933601 Feedback>).

CVSS Metrics

Group	Score	Vector
Base	0	AV:–/AC:–/Au:–/C:–/I:–/A:–
Temporal	0	E:ND/RL:ND/RC:ND
Environmental	0	CDP:ND/TD:ND/CR:ND/IR:ND/AR:ND

References

• <http://www.auscert.org.au/5552&gt;
• <http://secunia.com/advisories/17062/&gt;
• <http://securitytracker.com/alerts/2005/Oct/1015000.html&gt;
• http://www.idefense.com/application/poi/display?id=313&type=vulnerabilities

Acknowledgements

This vulnerability was reported by AusCERT. AusCERT credits iDEFENSE with providing information regarding this issue.

This document was written by Jeff Gennari.

Other Information

CVE IDs:	CVE-2005-2933
Severity Metric:	10.33 Date Public: