Multiple memory leak vulnerabilities in isakmpd

Overview

Multiple memory handling vulnerabilities exist in the isakmpd that could allow a remote attacker to cause a denial of service.

Description

The OpenBSD isakmpd establishes security associations for encrypted and authenticated (IPsec) network traffic. It implements the Internet Security Association and Key Management Protocol (ISAKMP) and Internet Key Exchange (IKE) protocol. Under various circumstances, memory allocated by isakmpd during processing of ISAKMP packets was never subsequently freed. As a result, a remote attacker with the ability to craft ISAKMP packets with particular characteristics could cause the isakmpd service to exhaust available memory and crash.

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Impact

A remote attacker could cause the isakmpd service to crash. Subsequent IPsec-enabled communications may be disrupted as a result.

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Solution

Apply a patch from the vendor

Patches have been released to address this issue. Please see the Systems Affected section of this document for more details.

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Vendor Information

996177

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OpenBSD __ Affected

Updated: August 20, 2004

Status

Affected

Vendor Statement

`Several bugs have been found in the ISAKMP daemon which can lead to memory
leaks and a remote denial of service condition. An attacker can craft
malformed payloads that can cause the isakmpd(8) process to stop
processing requests.

The problem is fixed in -current, 3.4-stable and 3.3-stable.

Patches are available at:

<ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.4/common/015_isakmpd2.patch>
<ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.3/common/020_isakmpd2.patch>
`

Vendor Information

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

Addendum

The CERT/CC has no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23996177 Feedback>).

CVSS Metrics

Group	Score	Vector
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References

Acknowledgements

This vulnerability was discovered by Rapid7 using their Striker test suite.

This document was written by Chad R Dougherty based on information published in Rapid7 Advisory R7-0018.

Other Information

CVE IDs:	CVE-2004-0222
Severity Metric:	1.69 Date Public: