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Last updated: 10/23/2014 2:41:22 AM

CVE Publication rate: 53.33

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Vulnerability Workload Index: 15.4
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National Cyber Awareness System

Vulnerability Summary for CVE-2008-2420

Original release date: 05/23/2008
Last revised: 03/07/2011
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):
CVSS v2 Base Score: 6.8 (MEDIUM) (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: Allows unauthorized disclosure of information; Allows unauthorized modification; 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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External Source: MLIST
Name: [stunnel-announce] 20080519 stunnel 4.24 released
External Source: FEDORA
Name: FEDORA-2008-4579
External Source: FEDORA
Name: FEDORA-2008-4606
External Source: SECUNIA
Name: 30425
External Source: GENTOO
Name: GLSA-200808-08
External Source: MANDRIVA
Name: MDVSA-2008:168
External Source: XF
Name: stunnel-ocsp-security-bypass(42528)
External Source: BID
Name: 29309
Type: Patch Information
External Source: FEDORA
Name: FEDORA-2008-4531
External Source: SECUNIA
Name: 30335
Type: Advisory
External Source: SECUNIA
Name: 31438
External Source: VUPEN
Name: ADV-2008-1569

Vulnerable software and versions

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

Technical Details

Vulnerability Type (View All)
  • Permissions, Privileges, and Access Control (CWE-264)