Security Bulletin
Summary
In two instances, IBM Security Verify Bridge (ISVB) uses a relatively weak cryptographic algorithm. (1) If no transport layer security (TLS) preference is specified, ISVB defaults to TLS 1.0 which has known vulnerabilities. (2) When generating a random number during LDAP bind authentication, ISVB chooses an older, less secure randomizer. As of v1.0.5, ISVB is now defaulting to TLS 1.2 and is using a cryptographically strong random number generator.
Vulnerability Details
CVEID: CVE-2021-20441
DESCRIPTION: IBM Security Verify Bridge uses weaker than expected cryptographic algorithms that could allow an attacker to decrypt highly sensitive information.
CVSS Base score: 5.9
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/196617 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)
Affected Products and Versions
| Affected Product(s) | Version(s) |
| IBM Security Verify Bridge | All |
Remediation/Fixes
Log in to IBM X-Force Exchange / App Exchange and download and install IBM Security Verify Bridge v1.0.5 (or later) at https://exchange.xforce.ibmcloud.com/hub/extension/1c7235901d5d37bf06665ce56d5ab426
Workarounds and Mitigations
None
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References
Acknowledgement
Gabor Minyo
Change History
12 Feb 2021: Initial Publication
*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.
Disclaimer
Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.
Document Location
Worldwide
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Document Information
Modified date:
09 March 2021
UID
ibm16421023