National Cyber-Alert System
Vulnerability Summary for CVE-2008-2420
Original release date:05/23/2008
Last revised:09/11/2008
Source:
US-CERT/NIST
Overview
The OCSP functionality in stunnel before 4.24 does not properly search certificate revocation lists (CRL), which allows remote attackers to bypass intended access restrictions by using revoked certificates.
Impact
CVSS Severity (version 2.0):
Impact Subscore:
6.4
Exploitability Subscore:
8.6
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Medium
Authentication: Not required to exploit
Impact Type:Provides unauthorized access, Allows partial confidentiality, integrity, and availability violation; Allows unauthorized disclosure of information; Allows disruption of service
- Official Statement from Red Hat (05/26/2008)
-
Not vulnerable. OCSP protocol support was only implemented in upstream stunnel version 4.16. Therefore OCSP protocol is not available in the versions of stunnel as shipped with Red Hat Enterprise Linux 2.1, 3, 4, or 5.
References to Advisories, Solutions, and Tools
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External Source: BID
Name: 29309
Type: Patch Information
External Source: XF
Name: stunnel-ocsp-security-bypass(42528)
External Source: MANDRIVA
Name: MDVSA-2008:168
External Source: VUPEN
Name: ADV-2008-1569
Type: Advisory
External Source: MLIST
Name: [stunnel-announce] 20080519 stunnel 4.24 released
External Source: GENTOO
Name: GLSA-200808-08
External Source: SECUNIA
Name: 31438
External Source: SECUNIA
Name: 30335
Type: Advisory
External Source: FEDORA
Name: FEDORA-2008-4606
External Source: FEDORA
Name: FEDORA-2008-4579
External Source: FEDORA
Name: FEDORA-2008-4531
External Source: SECUNIA
Name: 30425
