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Vulnerability Details : CVE-2008-2420

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.
Publish Date : 2008-05-23 Last Update Date : 2017-08-07
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- CVSS Scores & Vulnerability Types

CVSS Score
6.8
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access User
Vulnerability Type(s) Bypass a restriction or similar
CWE ID 264

- Vendor Statements

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.
Source: Redhat

- Products Affected By CVE-2008-2420

# Product Type Vendor Product Version Update Edition Language
1 Application Stunnel Stunnel 3.4a Version Details Vulnerabilities
2 Application Stunnel Stunnel 3.5 Version Details Vulnerabilities
3 Application Stunnel Stunnel 3.6 Version Details Vulnerabilities
4 Application Stunnel Stunnel 3.7 Version Details Vulnerabilities
5 Application Stunnel Stunnel 3.8p2 Version Details Vulnerabilities
6 Application Stunnel Stunnel 3.8p3 Version Details Vulnerabilities
7 Application Stunnel Stunnel 3.8 Version Details Vulnerabilities
8 Application Stunnel Stunnel 3.8p4 Version Details Vulnerabilities
9 Application Stunnel Stunnel 3.8p1 Version Details Vulnerabilities
10 Application Stunnel Stunnel 3.9 Version Details Vulnerabilities
11 Application Stunnel Stunnel 3.10 Version Details Vulnerabilities
12 Application Stunnel Stunnel 3.11 Version Details Vulnerabilities
13 Application Stunnel Stunnel 3.12 Version Details Vulnerabilities
14 Application Stunnel Stunnel 3.13 Version Details Vulnerabilities
15 Application Stunnel Stunnel 3.14 Version Details Vulnerabilities
16 Application Stunnel Stunnel 3.15 Version Details Vulnerabilities
17 Application Stunnel Stunnel 3.16 Version Details Vulnerabilities
18 Application Stunnel Stunnel 3.17 Version Details Vulnerabilities
19 Application Stunnel Stunnel 3.18 Version Details Vulnerabilities
20 Application Stunnel Stunnel 3.19 Version Details Vulnerabilities
21 Application Stunnel Stunnel 3.20 Version Details Vulnerabilities
22 Application Stunnel Stunnel 3.21a Version Details Vulnerabilities
23 Application Stunnel Stunnel 3.21b Version Details Vulnerabilities
24 Application Stunnel Stunnel 3.21c Version Details Vulnerabilities
25 Application Stunnel Stunnel 3.21 Version Details Vulnerabilities
26 Application Stunnel Stunnel 3.22 Version Details Vulnerabilities
27 Application Stunnel Stunnel 3.23 Version Details Vulnerabilities
28 Application Stunnel Stunnel 3.24 Version Details Vulnerabilities
29 Application Stunnel Stunnel 3.25 Version Details Vulnerabilities
30 Application Stunnel Stunnel 3.26 Version Details Vulnerabilities
31 Application Stunnel Stunnel 4.00 Version Details Vulnerabilities
32 Application Stunnel Stunnel 4.01 Version Details Vulnerabilities
33 Application Stunnel Stunnel 4.02 Version Details Vulnerabilities
34 Application Stunnel Stunnel 4.03 Version Details Vulnerabilities
35 Application Stunnel Stunnel 4.04 Version Details Vulnerabilities
36 Application Stunnel Stunnel 4.05 Version Details Vulnerabilities
37 Application Stunnel Stunnel 4.06 Version Details Vulnerabilities
38 Application Stunnel Stunnel 4.07 Version Details Vulnerabilities
39 Application Stunnel Stunnel 4.08 Version Details Vulnerabilities
40 Application Stunnel Stunnel 4.09 Version Details Vulnerabilities
41 Application Stunnel Stunnel 4.10 Version Details Vulnerabilities
42 Application Stunnel Stunnel 4.11 Version Details Vulnerabilities
43 Application Stunnel Stunnel 4.12 Version Details Vulnerabilities
44 Application Stunnel Stunnel 4.13 Version Details Vulnerabilities
45 Application Stunnel Stunnel 4.14 Version Details Vulnerabilities
46 Application Stunnel Stunnel 4.15 Version Details Vulnerabilities
47 Application Stunnel Stunnel 4.16 Version Details Vulnerabilities
48 Application Stunnel Stunnel 4.17 Version Details Vulnerabilities
49 Application Stunnel Stunnel 4.18 Version Details Vulnerabilities
50 Application Stunnel Stunnel 4.19 Version Details Vulnerabilities
51 Application Stunnel Stunnel 4.20 Version Details Vulnerabilities
52 Application Stunnel Stunnel 4.21 Version Details Vulnerabilities
53 Application Stunnel Stunnel 4.22 Version Details Vulnerabilities
54 Application Stunnel Stunnel 4.23 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Stunnel Stunnel 54

- References For CVE-2008-2420

https://www.redhat.com/archives/fedora-package-announce/2008-May/msg00942.html
FEDORA FEDORA-2008-4606
https://www.redhat.com/archives/fedora-package-announce/2008-May/msg00907.html
FEDORA FEDORA-2008-4579
https://www.redhat.com/archives/fedora-package-announce/2008-May/msg00856.html
FEDORA FEDORA-2008-4531
http://www.securityfocus.com/bid/29309
BID 29309 Stunnel OCSP Certificate Validation Security Bypass Vulnerability Release Date:2008-08-14
http://www.vupen.com/english/advisories/2008/1569/references
VUPEN ADV-2008-1569
https://exchange.xforce.ibmcloud.com/vulnerabilities/42528
XF stunnel-ocsp-security-bypass(42528)
http://www.mandriva.com/security/advisories?name=MDVSA-2008:168
MANDRIVA MDVSA-2008:168
http://security.gentoo.org/glsa/glsa-200808-08.xml
GENTOO GLSA-200808-08
http://stunnel.mirt.net/pipermail/stunnel-announce/2008-May/000035.html
MLIST [stunnel-announce] 20080519 stunnel 4.24 released

- Metasploit Modules Related To CVE-2008-2420

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)
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