National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2008-2420 Detail

Description

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.

Source:  MITRE      Last Modified:  05/23/2008

Quick Info

CVE Dictionary Entry:
CVE-2008-2420
Original release date:
05/23/2008
Last revised:
08/07/2017
Source:
US-CERT/NIST

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score:
6.8 MEDIUM
Vector:
(AV:N/AC:M/Au:N/C:P/I:P/A:P) (legend)
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

Vendor Statements (disclaimer)

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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Hyperlink Resource Type Source Name
http://security.gentoo.org/glsa/glsa-200808-08.xml External Source GENTOO GLSA-200808-08
http://stunnel.mirt.net/pipermail/stunnel-announce/2008-May/000035.html External Source MLIST [stunnel-announce] 20080519 stunnel 4.24 released
http://www.mandriva.com/security/advisories?name=MDVSA-2008:168 External Source MANDRIVA MDVSA-2008:168
http://www.securityfocus.com/bid/29309 Patch External Source BID 29309
http://www.vupen.com/english/advisories/2008/1569/references External Source VUPEN ADV-2008-1569
https://exchange.xforce.ibmcloud.com/vulnerabilities/42528 External Source XF stunnel-ocsp-security-bypass(42528)
https://www.redhat.com/archives/fedora-package-announce/2008-May/msg00856.html External Source FEDORA FEDORA-2008-4531
https://www.redhat.com/archives/fedora-package-announce/2008-May/msg00907.html External Source FEDORA FEDORA-2008-4579
https://www.redhat.com/archives/fedora-package-announce/2008-May/msg00942.html External Source FEDORA FEDORA-2008-4606

Technical Details

Vulnerability Type (View All)

  • Permissions, Privileges, and Access Control (CWE-264)

Vulnerable software and versions Switch to CPE 2.2

Configuration 1
OR
cpe:2.3:a:stunnel:stunnel:3.4a:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:3.5:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:3.6:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:3.7:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:3.8:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:3.8p1:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:3.8p2:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:3.8p3:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:3.8p4:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:3.9:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:3.10:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:3.11:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:3.12:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:3.13:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:3.14:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:3.15:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:3.16:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:3.17:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:3.18:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:3.19:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:3.20:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:3.21:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:3.21a:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:3.21b:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:3.21c:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:3.22:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:3.23:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:3.24:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:3.25:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:3.26:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.00:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.01:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.02:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.03:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.04:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.05:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.06:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.07:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.08:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.09:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.10:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.11:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.12:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.13:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.14:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.15:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.16:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.17:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.18:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.19:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.20:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.21:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.22:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.23:*:*:*:*:*:*:*

Denotes Vulnerable Software
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