Security Bulletin: Vulnerability in MD5 Signature and Hash Algorithm affects IBM MessageSight (CVE-2015-7575)

Summary

The MD5 “SLOTH” vulnerability on TLS 1.2 affects IBM MessageSight.

Vulnerability Details

CVEID: CVE-2015-7575

DESCRIPTION: The TLS protocol could allow weaker than expected security caused by a collision attack when using the MD5 hash function for signing a ServerKeyExchange message during a TLS handshake. An attacker could exploit this vulnerability using man-in-the-middle techniques to impersonate a TLS server and obtain credentials.

CVSS Base Score: 7.1
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/109415 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N)

Affected Products and Versions

IBM MessageSight 1.2.0.3 and below

Remediation/Fixes

Product

|
VRMF|
APAR|
Remediation/First Fix
—|—|—|—
IBM MessageSight| 1.1| IT13410| 1.1.0.1-IBM-IMAIFIT13410

IBM MessageSight|
1.2|
IT13392|
1.2.0.3-IBM-IMA-IFIT13392

You should verify applying this fix does not cause any compatibility issues. The fix disables MD5 signature hash by default. If you change the default setting after applying the fix, you will expose yourself to the attack described above. IBM recommends that you review your entire environment to identify other areas where you have enabled the MD5 signature hash and take appropriate mitigation and remediation actions.