Security Bulletin: TS3000 code levels 5.x and 7.x affected by various OpenSSL vulnerabilities

Summary

Six security vulnerabilities have been found that affect most levels of TSSC code.

Vulnerability Details

A malicious user could exploit these vulnerabilities to decrypt and modify traffic sent between a client and a server, to execute arbitrary code on a client or server, crash a server, or implement a denial-of-service attack.

**DESCRIPTION:******OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols, as well as a full-strength, general purpose cryptography library.

It was found that OpenSSL clients and servers could be forced, via a specially crafted handshake packet, to use weak keying material for communication. A man-in-the-middle attacker could use this flaw to decrypt and modify traffic between a client and a server. (CVE-2014-0224)

Note: In order to exploit this flaw, both the server and the client must be using a vulnerable version of OpenSSL; the server must be using OpenSSL version 1.0.1 and above, and the client must be using any version of OpenSSL.

A buffer overflow flaw was found in the way OpenSSL handled invalid DTLS packet fragments. A remote attacker could possibly use this flaw to execute arbitrary code on a DTLS client or server. (CVE-2014-0195)

Multiple flaws were found in the way OpenSSL handled read and write buffers when the SSL_MODE_RELEASE_BUFFERS mode was enabled. A TLS/SSL client or server using OpenSSL could crash or unexpectedly drop connections when processing certain SSL traffic. (CVE-2010-5298, CVE-2014-0198)

A denial of service flaw was found in the way OpenSSL handled certain DTLS ServerHello requests. A specially crafted DTLS handshake packet could cause a DTLS client using OpenSSL to crash. (CVE-2014-0221)

A NULL pointer dereference flaw was found in the way OpenSSL performed anonymous Elliptic Curve Diffie Hellman (ECDH) key exchange. A specially crafted handshake packet could cause a TLS/SSL client that has the anonymous ECDH cipher suite enabled to crash. (CVE-2014-3470)

CVSS Base Score: 5.8 CVSS Temporal Score: See <http://xforce.iss.net/xforce/xfdb/93586&gt; for the current score CVSS Environmental Score*: Undefined CVSS Vector: (AV:N/AC:M/Au:N/C:P/I:P/A:N)

Affected Products and Versions

TSSC 5.12, 7.0-7.3

Remediation/Fixes

Update to TSSC 7.3.15 and apply OpenSSL patch “sslUpdate.”

Workarounds and Mitigations

No known workarounds. TSSC should be updated to 7.3.15 and patched.