Observable discrepancy in Apache Pulsar - CVE-2023-51437

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Main Vulnerability Database Vulnerabilities #VU86330

Observable discrepancy in Apache Pulsar - CVE-2023-51437

Published: February 12, 2024


Vulnerability identifier: #VU86330
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-51437
CWE-ID: CWE-203
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to bypass authentication.

The vulnerability exists due to observable timing discrepancy in SASL authentication provider. A remote attacker can forge a SASL Role Token that will pass signature verification and bypass SASL authentication.


Affected software

Apache Pulsar
IBM Tivoli Netcool/OMNIbus Integration – Transport Module Common Integration Library

How to mitigate CVE-2023-51437

Install updates from vendor's website.

Apache Pulsar - addressed in versions 2.11.3, 3.0.2, 3.1.1
IBM Tivoli Netcool/OMNIbus Integration – Transport Module Common Integration Library - update to 39.0

External References

Related Security Bulletins