OpenSSL may fail to properly parse invalid ASN.1 structures

Overview

A vulnerability in OpenSSL may allow an attacker to create a denial-of-service condition.

Description

OpenSSL is an Open Source toolkit that implements the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols.

When parsing certain invalid ASN.1 structures, OpenSSL may mishandle an error condition, resulting in an infinite loop. By triggering the infinite loop, an attacker may be able to create a denial-of-service condition.

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Impact

A remote, unauthenticated attacker may be able create a denial-of-service condition.

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Solution

See the systems affected section of this document for information about specific vendors. Users who compile OpenSSL from source are encouraged to apply the updates listed in OpenSSL Security Advisory 20060928.

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Vendor Information

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Debian GNU/Linux __ Affected

Updated: October 04, 2006

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

See <http://lists.debian.org/debian-security-announce/debian-security-announce-2006/msg00279.html&gt; for more details.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23247744 Feedback>).

FreeBSD, Inc. __ Affected

Updated: September 29, 2006

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

See FreeBSD Project Security Advisory <http://security.freebsd.org/advisories/FreeBSD-SA-06:23.openssl.asc&gt; for more details.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23247744 Feedback>).

OpenSSL __ Affected

Updated: September 28, 2006

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

See <http://www.openssl.org/news/secadv_20060928.txt&gt; for more details.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23247744 Feedback>).

Red Hat, Inc. __ Affected

Updated: September 29, 2006

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

See <http://rhn.redhat.com/errata/RHSA-2006-0695.html&gt; for more details.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23247744 Feedback>).

Ubuntu __ Affected

Updated: September 28, 2006

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

See <http://www.ubuntu.com/usn/usn-353-1&gt; for more details.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23247744 Feedback>).

CVSS Metrics

Group	Score	Vector
Base
Temporal
Environmental

References

• <http://www.openssl.org/news/secadv_20060928.txt&gt;
• <http://www.openssl.org/&gt;
• <http://secunia.com/advisories/23131/&gt;
• <http://secunia.com/advisories/22544/&gt;
• <http://secunia.com/advisories/22385/&gt;
• <http://secunia.com/advisories/22671/&gt;
• <http://secunia.com/advisories/23155/&gt;
• <http://secunia.com/advisories/23340/&gt;
• <http://secunia.com/advisories/22094/&gt;
• <http://secunia.com/advisories/22259/&gt;
• <http://www.f-secure.com/security/fsc-2006-6.shtml&gt;
• <http://secunia.com/advisories/23280/&gt;
• <http://secunia.com/advisories/23309/&gt;
• <http://secunia.com/advisories/23351/&gt;
• <http://sunsolve.sun.com/search/document.do?assetkey=1-26-102668-1&gt;

Acknowledgements

This vulnerability was reported by the OpenSSL development team in OpenSSL Security Advisory 20060928. The OpenSSL team, in turn, acknowledge Dr. S. N. Henson of Open Network Security and NISCC for funding the ASN.1 test suite project that lead to the discovery of this issue.

This document was written by Ryan Giobbi.

Other Information

CVE IDs:	CVE-2006-2937
Severity Metric:	0.28 Date Public: