Security Bulletin: Tivoli Workload Scheduler is affected by the following OpenSSL vulnerabilities: CVE-2014-0224, CVE-2014-0221, CVE-2014-0195, CVE-2014-3470

Vulnerability Details

CVE-ID: CVE-2014-0224
DESCRIPTION: OpenSSL is vulnerable to a man-in-the-middle attack, caused by the use of weak keying material in SSL/TLS clients and servers. A remote attacker could exploit this vulnerability using a specially-crafted handshake to conduct man-in-the-middle attacks to decrypt and modify traffic.
CVSS Base Score: 5.8
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/93586 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:M/Au:N/C:P/I:P/A:N)

CVE-ID: CVE-2014-0221
DESCRIPTION: OpenSSL is vulnerable to a denial of service, caused by a recursion error in the DTLS client. By sending an invalid DTLS handshake, a remote attacker could exploit this vulnerability to cause the application to crash.
CVSS Base Score: 4.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/93587 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:M/Au:N/C:N/I:N/A:P)



CVE-ID: CVE-2014-0195
DESCRIPTION: OpenSSL is vulnerable to a buffer overflow. By sending invalid DTLS packet fragments, a remote attacker could exploit this vulnerability to overrun the client or server and execute arbitrary code on a DTLS client or server.
CVSS Base Score: 7.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/93588 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:L/Au:N/C:P/I:P/A:P)

CVE-ID: CVE-2014-3470
DESCRIPTION: OpenSSL is vulnerable to a denial of service, caused by the implementation of anonymous ECDH ciphersuites. A remote attacker could exploit this vulnerability to cause a denial of service.
CVSS Base Score: 4.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/93589 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:M/Au:N/C:N/I:N/A:P)

TWS uses OpenSSL only for secure communication between internal processes.
For Tivoli Workload Scheduler Distributed, TWS nodes are impacted by OpenSSL security exposure only if the TWS workstation has been defined with “securitylevel” set to on or enabled or force.
The security exposures do not apply to the embedded WebSphere Application Server but only to programs installed under <TWS home>/bin.

The security vulnerability applies to os400 Dynamic Agents only, does not apply to Dynamic Agents or zCentric agents for all the other platforms.

For Tivoli Workload Scheduler for Applications, the programs that are installed in
<TWS home>/methods are impacted if the agent that is hosting the methods has been defined with a “securitylevel” set to on or enabled or force.

TWS is a backoffice application that usually runs over a protected infrastructure where connections with outside networks is forbidden. Connection with branch offices where TWS agents run are always implemented through VPNs. For this reason SSL is not often used to interconnect TWS nodes. Customers with high security demands activate SSL, but they never let TWS nodes to communicate over unsecured networks.
Saying that, the probability of having attacks is very limited, moreover the majority of the exposures belong to the "denial of service" category. This in the worst case, will lead to the temporary unavailability of the attacked TWS nodes.