Security Bulletin: A security vulnerability has been identified in Openssl shipped with PowerAI.

Summary

Multiple vulnerabilities CVE-2019-1547, CVE-2019-1549 and CVE-2019-1563 were found in Openssl package.

Vulnerability Details

CVEID:CVE-2019-1547
**DESCRIPTION:**Normally in OpenSSL, EC groups have a cofactor present which is used in side channel resistant code paths. However, it is possible to construct a group using explicit parameters instead of using a named curve. In those cases it is possible that the EC group does not have the cofactor present. This can occur even where all the parameters match a known named curve. If such a curve is used, then OpenSSL falls back to non-side channel resistant code paths, which may result in full key recovery during an ECDSA signature operation. In order to exploit this vulnerability, an attacker would have to be able to time the creation of a large number of signatures where explicit parameters with no cofactor present are in use by an application using libcrypto. To avoid this possibility, use libssl, which is not vulnerable because explicit parameters are never used. Fixed in OpenSSL 1.1.1d (Affected 1.1.1-1.1.1c). Fixed in OpenSSL 1.1.0l (Affected 1.1.0-1.1.0k). Fixed in OpenSSL 1.0.2t (Affected 1.0.2-1.0.2s).
CVSS Base score: 5.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/167020 for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N)

CVEID:CVE-2019-1549
**DESCRIPTION:**OpenSSL 1.1.1 introduced a rewritten random number generator (RNG). This was intended to include protection in the event of a fork() system call in order to ensure that the parent and child processes did not share the same RNG state. However this protection was not being used in the default case. A partial mitigation for this issue is that the output from a high precision timer is mixed into the RNG state so the likelihood of a parent and child process sharing state is significantly reduced. If an application already calls OPENSSL_init_crypto() explicitly using OPENSSL_INIT_ATFORK then this problem does not occur at all. Fixed in OpenSSL 1.1.1d (Affected 1.1.1-1.1.1c).
CVSS Base score: 3.7
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/167021 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N)

CVEID:CVE-2019-1563
**DESCRIPTION:**In situations where an attacker receives automated notification of the success or failure of a decryption attempt an attacker, after sending a very large number of messages to be decrypted, can recover a CMS/PKCS7 transported encryption key or decrypt any RSA encrypted message that was encrypted with the public RSA key, using a Bleichenbacher padding oracle attack. Applications are not affected if they use a certificate together with the private RSA key to the CMS_decrypt or PKCS7_decrypt functions to select the correct recipient info to decrypt. Fixed in OpenSSL 1.1.1d (Affected 1.1.1-1.1.1c). Fixed in OpenSSL 1.1.0l (Affected 1.1.0-1.1.0k). Fixed in OpenSSL 1.0.2t (Affected 1.0.2-1.0.2s).
CVSS Base score: 3.7
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/167022 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N)

Affected Products and Versions

Remediation/Fixes

Container images with iFix for the above vulnerabilities shipped with PowerAI 1.5.4 is published at

https://hub.docker.com/r/ibmcom/powerai

Execute the following commands from the system in which the docker is installed:

docker pull ibmcom/powerai:<tag>
docker run -ti --env LICENSE=yes ibmcom/powerai:<tag> bash

Where <tag> is a 1.5.4 specific tag. Available image tags can be found at:
<https://hub.docker.com/r/ibmcom/powerai/tags>

Workarounds and Mitigations

None