Vulnerability identifier: #VU11847

Vulnerability risk: Low

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2008-2420

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Stunnel
Client/Desktop applications / Encryption software

Vendor: Stunnel.org

Description
The vulnerability allows a remote attacker to bypass security restrictions on the target system.

The weakness exists in the OCSP functionality due to improper search of certificate revocation lists (CRL). A remote attacker can use revoked certificates and bypass intended access restrictions.

Mitigation
Update to version 4.24.

Vulnerable software versions

Stunnel: 4.20 - 4.23

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External links
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10852&cat=SIRT_1&actp=LIST

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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.