Information disclosure in IBM MQ

1) Information disclosure

EUVDB-ID: #VU1962

Risk: Low

CVSSv3.1: 4.1 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-0702

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a local attacker to decrypt data passed via encrypted SSL connection.

The vulnerability exists in the MOD_EXP_CTIME_COPY_FROM_PREBUF() function in crypto/bn/bn_exp.c. The application does not properly consider cache-bank access times during modular exponentiation, which makes it easier for local users to discover RSA keys by running a crafted application on the same Intel Sandy Bridge CPU core as a victim and leveraging cache-bank conflicts.

The vulnerability was dubbed "CacheBleed".

Mitigation

Install update from vendor's website.

Vulnerable software versions

IBM MQ: 7.0.1.0 - 9.0.4

External links

http://www-01.ibm.com/support/docview.wss?uid=swg22013020&myns=swgws&mynp=OCSSYHRD&mynp=OCSSFKSJ&mync=E&cm_sp=swgws-_-OCSSYHRD-OCSSFKSJ-_-E

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.