Improper check for certificate revocation in IBM AIX



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2024-0853
CWE-ID CWE-299
Exploitation vector Network
Public exploit N/A
Vulnerable software
 IBM AIX
Operating systems & Components / Operating system

Vendor IBM Corporation

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Improper check for certificate revocation

EUVDB-ID: #VU85927

Risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-0853

CWE-ID: CWE-299 - Improper Check for Certificate Revocation

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass OCSP verification.

The vulnerability exists due to curl inadvertently keeps the SSL session ID for connections in its cache even when the verify status (OCSP stapling) test has failed. A subsequent transfer to the same hostname will be successful if the session ID cache is still fresh, which leads to skipping the verify status check. As a result, OCSP verification is always successful for all subsequent TLS sessions.

Mitigation

Install update from vendor's website.

Vulnerable software versions

IBM AIX: All versions

CPE2.3 External links

https://www.ibm.com/support/pages/node/7158221


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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



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