OpenSSL Advisory - Multiple Vulnerabilities
Date: 5 June 2014
The purpose of this advisory is to bring attention to multiple security advisories released by OpenSSL.
CCIRC is aware of six recently disclosed vulnerabilities in OpenSSL, two of which are rated as critical. The vulnerabilities exist in the Transport Layer Security (TLS) and Datagram TLS (DTLS) and could be remotely exploited by attackers.
Affected versions: OpenSSL 0.9.8, 1.0.0, 1.0.1, 1.0.2-beta1
The critical vulnerabilities are DTLS invalid fragment vulnerability (CVE-2014-0195) and SSL/TLS MITM Vulnerability (CVE-2014-0224) and are affecting multiple versions of OpenSSL. The DTLS invalid fragment vulnerability is rated critical on both the client and server side. The SSL/DTLS MITM Vulnerability is rated critical on the client side and rated as important on the server side.
The four vulnerabilities rated as important include a DTLS recursion flaw, SSL_MODE_RELEASE_BUFFERS NULL pointer deference, SSL_MODE_BUFFERS session and ECDH vulnerabilities. Exploitation of these vulnerabilities could allow attackers to cause a denial of service attack.
CVE References: CVE-2014-0224, CVE-2014-0221, CVE-2014-0195, CVE-2014-0198, CVE-2010-5298, CVE-2014-3470
CCIRC recommends that system administrators test and deploy the vendor released updates to affected platforms accordingly.
- OpenSSL 0.9.8 SSL/TLS users (client and/or server) should upgrade to 0.9.8za.
- OpenSSL 1.0.0 SSL/TLS users (client and/or server) should upgrade to 1.0.0m.
- OpenSSL 1.0.1 SSL/TLS users (client and/or server) should upgrade to 1.0.1h.
- OpenSSL 1.0.0 users should upgrade to 1.0.0m.
- OpenSSL 1.0.1 users should upgrade to 1.0.1h.
Note to Readers
In support of Public Safety's mission to build a safe and resilient Canada, CCIRC's mandate is to help ensure the security and resilience of the vital non-federal government cyber systems that underpin Canada's national security, public safety and economic prosperity. As Canada's computer security incident response team, CCIRC is Canada's national coordination centre for the prevention and mitigation of, preparedness for, response to, and recovery from cyber incidents on non-federal government systems. It does this by providing authoritative advice and support, and coordinating information sharing and incident response.
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