Cisco Security Advisory
OpenSSL RSA Temporary Key Cryptographic Downgrade Vulnerability
Medium
Advisory ID:
Cisco-SA-20150113-CVE-2015-0204
First Published:
2015 January 13 19:57 GMT
Last Updated:
2015 September 25 12:45 GMT
Version 14.0:
Workarounds:
No workarounds available
Cisco Bug IDs:
CVSS Score:
Base 5.0,
Temporal 4.1
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AV:N/AC:L/Au:N/C:N/I:P/A:N/E:F/RL:OF/RC:C
Click Icon to Copy Verbose Score
AV:N/AC:L/Au:N/C:N/I:P/A:N/E:F/RL:OF/RC:C
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A vulnerability in OpenSSL could allow an unauthenticated, remote attacker to bypass security restrictions.
The vulnerability is due to improper handling of an RSA temporary key. An attacker with a privileged network position could exploit the vulnerability by returning a weak temporary RSA key to a system using an application that uses the vulnerable OpenSSL library. When processed, the insecure temporary key could result in reduced cryptographic protections, which could allow the attacker to bypass security protections.
OpenSSL has confirmed the vulnerability and released software updates.
To exploit the vulnerability, the attacker likely requires privileged network access to trusted or internal networks to return temporary RSA keys to the targeted system. This access requirement greatly limits the likelihood of a successful exploit.
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OpenSSL has released a security advisory at the following link: CVE-2015-0204
BlackBerry has released a security advisory at the following link: CVE-2015-0204
FreeBSD has released a VuXML document at the following link: OpenSSL -- multiple vulnerabilities
HP has released security bulletins c04604357, c04635715, c0467933, c04765169, c04762744, c04773241, c04765115, c04774021 and c04805275 at the following links: HPSBGN03299 SSRT101987, HPSBOV03318, HPSBUX03334 SSRT102000, HPSBMU03397 SSRT102192, HPSBMU03394 SSRT102187, HPSBMU03345 SSRT102095, HPSBMU03413, HPSBMU03396 and HPSBMU03422 SSRT101438
IBM has released a security advisory at the following link: CVE-2015-0204
Red Hat has released an official CVE statement and security advisories for bug 1180184 at the following links: CVE-2015-0204, RHSA-2015:0066 and RHSA-2015:0849
Splunk has released a security advisory at the following link: SP-CAAANZ7
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Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Administrators are advised to monitor affected systems.
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The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.
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To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
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Show LessVersion Description Section Status Date 13.0 HP has released additional security bulletins and software updates to address the OpenSSL RSA temporary key cryptographic downgrade vulnerability. NA Final 2015-AUG-25 12.0 HP has released an additional security bulletin and software updates to address the OpenSSL RSA temporary key cryptographic downgrade vulnerability. NA Final 2015-AUG-21 11.0 HP has released an additional security bulletin and software updates to address the OpenSSL RSA temporary key cryptographic downgrade vulnerability. NA Final 2015-AUG-20 10.0 HP has released an additional security bulletin and software updates to address the OpenSSL RSA temporary key cryptographic downgrade vulnerability. NA Final 2015-MAY-21 9.0 Splunk has released released a advisory and updated software to address the OpenSSL RSA temporary key cryptographic downgrade vulnerability. NA Final 2015-MAY-06 8.0 Red Hat has released an additional security advisory and updated packages to address the OpenSSL RSA temporary key cryptographic downgrade vulnerability. NA Final 2015-APR-17 7.0 CentOS has released additional updated packages to address the OpenSSL RSA temporary key cryptographic downgrade vulnerability. NA Final 2015-APR-15 6.0 HP has released an additional security bulletin and updated software to address the OpenSSL RSA temporary key cryptographic downgrade vulnerability. NA Final 2015-APR-14 5.0 BlackBerry has released a security advisory and updated software to address the OpenSSL RSA temporary key cryptographic downgrade vulnerability. NA Final 2015-APR-03 4.0 HP has released a security bulletin and updated software to address the OpenSSL RSA temporary key cryptographic downgrade vulnerability. NA Final 2015-MAR-30 3.0 IBM has released a security advisory and fixes to address the OpenSSL RSA temporary key cryptographic downgrade vulnerability. NA Final 2015-FEB-06 2.0 Red Hat has released a security advisory and updated packages to address the OpenSSL RSA temporary key cryptographic downgrade vulnerability. CentOS has also released updated packages to address this vulnerability. NA Final 2015-JAN-21
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