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CERT Coordination Center

RSA key reconstruction vulnerability

Vulnerability Note VU#724968

Original Release Date: 2007-08-01 | Last Revised: 2007-08-28

Overview

Various implementations of RSA may contain a vulnerability that could allow an attacker to retrieve encryption keys.

Description

Some implementations of RSA may contain a vulnerability that could allow a local attacker to retrieve encryption keys.

OpenSSL is a widely used open source implementation of the SSL and TLS protocols. OpenSSL is based on the SSLeay library. OpenSSL provides support for the RSA encryption algorithm. Note that vendors may include a vulnerable version of OpenSSL in web servers, VPN, or other products.

Impact

An attacker could possibly decrypt messages that were encrypted with OpenSSL using RSA algorithm.

Solution

Apply a patch
OpenSSL has released a patch to address this issue. See http://openssl.org/news/patch-CVE-2007-3108.txt for more details. See the systems affected portion of this document for a partial list of other vendors who may be affected.

Vendor Information

724968
 
Affected   Unknown   Unaffected

OpenSSL

Updated:  August 02, 2007

Status

  Vulnerable

Vendor Statement

The paper describes another example of a side-channel attack, not specific to OpenSSL, where an untrusted local user may be able to discover private key material that is in use on that system

(CVE-2007-3108).

The OpenSSL team have made the following patch available for OpenSSL 0.9.8 that can mitigate this issue. This patch will be part of a future release (although no new release is currently planned).

http://openssl.org/news/patch-CVE-2007-3108.txt

Vendor Information

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

America Online, Inc.

Notified:  June 28, 2007 Updated:  June 28, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Apache HTTP Server Project

Notified:  June 28, 2007 Updated:  June 28, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Apache-SSL

Notified:  June 28, 2007 Updated:  June 28, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Apple Computer, Inc.

Notified:  August 01, 2007 Updated:  August 01, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Aruba Networks, Inc.

Notified:  June 28, 2007 Updated:  June 28, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

AttachmateWRQ, Inc.

Notified:  June 28, 2007 Updated:  June 28, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Certicom

Notified:  June 28, 2007 Updated:  June 28, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Conectiva Inc.

Notified:  August 01, 2007 Updated:  August 01, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Covalent Technologies

Notified:  June 28, 2007 Updated:  June 28, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Cray Inc.

Notified:  August 01, 2007 Updated:  August 01, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Cryptlib

Notified:  June 28, 2007 Updated:  August 02, 2007

Status

  Unknown

Vendor Statement

This Vulnerability Note addresses a covert channel issue that represents one particular instance of a large class of side-channel attacks made possible by certain architectural features of modern CPUs. While it's possible to (probably) work around this one instance, the only fully effective solution that will work against current as well as future attacks of this kind is to not place sensitive data or data-dependent code flow in a position where side- channel attacks are possible. The cryptlib documentation contains guidance on doing this in the section "Safeguarding Cryptographic Operations".

Vendor Information

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

Crypto++ Library

Notified:  June 28, 2007 Updated:  June 28, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Debian GNU/Linux

Notified:  August 01, 2007 Updated:  August 01, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

EMC Corporation

Notified:  August 01, 2007 Updated:  August 01, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Engarde Secure Linux

Notified:  August 01, 2007 Updated:  August 01, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

F-Secure Corporation

Notified:  July 31, 2007 Updated:  July 31, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

F5 Networks, Inc.

Notified:  June 28, 2007 Updated:  June 28, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Fedora Project

Notified:  August 01, 2007 Updated:  August 01, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

FreeBSD, Inc.

Notified:  August 01, 2007 Updated:  August 01, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Fujitsu

Notified:  August 01, 2007 Updated:  August 01, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Gentoo Linux

Notified:  August 01, 2007 Updated:  August 01, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Hewlett-Packard Company

Notified:  August 01, 2007 Updated:  August 01, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Hitachi

Notified:  August 01, 2007 Updated:  August 01, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

IAIK Java Group

Notified:  June 28, 2007 Updated:  June 28, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

IBM Corporation

Notified:  August 01, 2007 Updated:  August 01, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

IBM Corporation (zseries)

Notified:  August 01, 2007 Updated:  August 01, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

IBM eServer

Notified:  August 01, 2007 Updated:  August 01, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Immunix Communications, Inc.

Notified:  August 01, 2007 Updated:  August 01, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Ingrian Networks, Inc.

Notified:  June 28, 2007 Updated:  June 28, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Juniper Networks, Inc.

Notified:  August 01, 2007 Updated:  August 01, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Lotus Software

Notified:  June 28, 2007 Updated:  June 28, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Mandriva, Inc.

Notified:  August 01, 2007 Updated:  August 01, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Microsoft Corporation

Notified:  June 28, 2007 Updated:  June 28, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Mirapoint, Inc.

Notified:  June 28, 2007 Updated:  June 28, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

MontaVista Software, Inc.

Notified:  August 01, 2007 Updated:  August 01, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Mozilla

Notified:  June 28, 2007 Updated:  June 28, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

NEC Corporation

Notified:  August 01, 2007 Updated:  August 01, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

NetBSD

Notified:  August 01, 2007 Updated:  August 01, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Netscape NSS

Notified:  June 28, 2007 Updated:  June 28, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Nokia

Notified:  June 28, 2007 Updated:  June 28, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Novell, Inc.

Notified:  August 01, 2007 Updated:  August 01, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

OpenBSD

Notified:  August 01, 2007 Updated:  August 01, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

OpenSSH

Notified:  August 13, 2007 Updated:  August 13, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Openwall GNU/*/Linux

Notified:  August 01, 2007 Updated:  August 01, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

QNX, Software Systems, Inc.

Notified:  August 01, 2007 Updated:  August 01, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

RSA Security, Inc.

Notified:  June 28, 2007 Updated:  June 28, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Red Hat, Inc.

Notified:  August 01, 2007 Updated:  August 01, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

SUSE Linux

Notified:  August 01, 2007 Updated:  August 01, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Secure Computing Network Security Division

Notified:  August 27, 2007 Updated:  August 27, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Silicon Graphics, Inc.

Notified:  August 01, 2007 Updated:  August 01, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Slackware Linux Inc.

Notified:  August 01, 2007 Updated:  August 01, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Sony Corporation

Notified:  August 01, 2007 Updated:  August 01, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Spyrus

Notified:  June 28, 2007 Updated:  June 28, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Stunnel

Notified:  June 28, 2007 Updated:  June 28, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Sun Microsystems, Inc.

Notified:  June 28, 2007 Updated:  June 28, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

The SCO Group

Notified:  August 01, 2007 Updated:  August 01, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Trustix Secure Linux

Notified:  August 01, 2007 Updated:  August 01, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Turbolinux

Notified:  August 01, 2007 Updated:  August 01, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Ubuntu

Notified:  August 01, 2007 Updated:  August 01, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Unisys

Notified:  August 01, 2007 Updated:  August 01, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Wind River Systems, Inc.

Notified:  August 01, 2007 Updated:  August 01, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

lsh

Notified:  June 28, 2007 Updated:  June 28, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

mod_ssl

Notified:  June 28, 2007 Updated:  June 28, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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


CVSS Metrics

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A

References

Credit

Thanks to Dr. Onur Aciicmez, Samsung Information Systems America, Samsung Electronics R&D Center, USA, and Prof. Werner Schindler, Bundesamt für Sicherheit in der Informationstechnik (BSI), Germany for reporting this vulnerability.

This document was written by Ryan Giobbi.

Other Information

CVE IDs: CVE-2007-3108
Severity Metric: 1.77
Date Public: 2007-08-02
Date First Published: 2007-08-01
Date Last Updated: 2007-08-28 14:18 UTC
Document Revision: 25

Sponsored by the Department of Homeland Security Office of Cybersecurity and Communications.