Vulnerability Name:

CVE-2008-2420 (CCN-42528)

Assigned:2008-05-19
Published:2008-05-19
Updated:2017-08-08
Summary: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.
CVSS v3 Severity:5.9 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): Low
Integrity (I): Low
Availibility (A): Low
CVSS v2 Severity:6.8 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P)
5.0 Medium (Temporal CVSS v2 Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P/E:U/RL:OF/RC:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
4.6 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P)
3.4 Low (CCN Temporal CVSS v2 Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P/E:U/RL:OF/RC:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
Vulnerability Type:CWE-264
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2008-2420

Source: CCN
Type: SA30335
Stunnel OCSP Revoked Certificate Security Issue

Source: SECUNIA
Type: Vendor Advisory
30335

Source: SECUNIA
Type: UNKNOWN
30425

Source: SECUNIA
Type: UNKNOWN
31438

Source: GENTOO
Type: UNKNOWN
GLSA-200808-08

Source: CCN
Type: stunnel-announce Mailing List, Mon May 19 14:36:49 CEST 2008
stunnel 4.24 released

Source: MLIST
Type: UNKNOWN
[stunnel-announce] 20080519 stunnel 4.24 released

Source: CCN
Type: GLSA-200808-08
stunnel: Security bypass

Source: MANDRIVA
Type: UNKNOWN
MDVSA-2008:168

Source: CCN
Type: OSVDB ID: 45357
Stunnel OCSP Revocated Certificate Rejection Weakness

Source: BID
Type: Patch
29309

Source: CCN
Type: BID-29309
Stunnel OCSP Certificate Validation Security Bypass Vulnerability

Source: CCN
Type: Stunnel Web site
Download Stunnel

Source: VUPEN
Type: UNKNOWN
ADV-2008-1569

Source: XF
Type: UNKNOWN
stunnel-ocsp-security-bypass(42528)

Source: XF
Type: UNKNOWN
stunnel-ocsp-security-bypass(42528)

Source: FEDORA
Type: UNKNOWN
FEDORA-2008-4531

Source: FEDORA
Type: UNKNOWN
FEDORA-2008-4579

Source: FEDORA
Type: UNKNOWN
FEDORA-2008-4606

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

    • Configuration CCN 1:
  • cpe:/a:stunnel:stunnel:3.8:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:4.0:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:3.10:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:3.11:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:3.12:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:3.13:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:3.14:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:3.15:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:3.16:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:3.17:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:3.18:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:3.19:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:3.20:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:3.21:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:3.21a:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:3.21b:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:3.21c:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:3.22:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:3.23:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:3.24:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:3.25:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:3.26:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:3.4a:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:3.5:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:3.6:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:3.7:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:3.8:p1:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:3.8:p2:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:3.8:p3:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:3.8:p4:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:3.9:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:4.01:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:4.02:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:4.03:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:4.04:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:4.05:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:4.06:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:4.07:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:4.08:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:4.09:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:4.10:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:4.11:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:4.12:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:4.13:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:4.14:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:4.15:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:4.16:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:4.17:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:4.18:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:4.19:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:4.20:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:4.21:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:4.22:*:*:*:*:*:*:*
  • OR cpe:/a:stunnel:stunnel:4.23:*:*:*:*:*:*:*
  • AND
  • cpe:/o:gentoo:linux:*:*:*:*:*:*:*:*
  • OR cpe:/o:mandrakesoft:mandrake_linux:2007.1:*:*:*:*:*:*:*
  • OR cpe:/o:mandrakesoft:mandrake_linux:2008.0::x86-64:*:*:*:*:*
  • OR cpe:/o:mandrakesoft:mandrake_linux:2008.0:*:*:*:*:*:*:*
  • OR cpe:/o:mandrakesoft:mandrake_linux:2008.1:x86_64:*:*:*:*:*:*
  • OR cpe:/o:mandrakesoft:mandrake_linux:2007.1::x86-64:*:*:*:*:*
  • OR cpe:/o:mandrakesoft:mandrake_linux:2008.1:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    stunnel stunnel 3.4a
    stunnel stunnel 3.5
    stunnel stunnel 3.6
    stunnel stunnel 3.7
    stunnel stunnel 3.8
    stunnel stunnel 3.8p1
    stunnel stunnel 3.8p2
    stunnel stunnel 3.8p3
    stunnel stunnel 3.8p4
    stunnel stunnel 3.9
    stunnel stunnel 3.10
    stunnel stunnel 3.11
    stunnel stunnel 3.12
    stunnel stunnel 3.13
    stunnel stunnel 3.14
    stunnel stunnel 3.15
    stunnel stunnel 3.16
    stunnel stunnel 3.17
    stunnel stunnel 3.18
    stunnel stunnel 3.19
    stunnel stunnel 3.20
    stunnel stunnel 3.21
    stunnel stunnel 3.21a
    stunnel stunnel 3.21b
    stunnel stunnel 3.21c
    stunnel stunnel 3.22
    stunnel stunnel 3.23
    stunnel stunnel 3.24
    stunnel stunnel 3.25
    stunnel stunnel 3.26
    stunnel stunnel 4.00
    stunnel stunnel 4.01
    stunnel stunnel 4.02
    stunnel stunnel 4.03
    stunnel stunnel 4.04
    stunnel stunnel 4.05
    stunnel stunnel 4.06
    stunnel stunnel 4.07
    stunnel stunnel 4.08
    stunnel stunnel 4.09
    stunnel stunnel 4.10
    stunnel stunnel 4.11
    stunnel stunnel 4.12
    stunnel stunnel 4.13
    stunnel stunnel 4.14
    stunnel stunnel 4.15
    stunnel stunnel 4.16
    stunnel stunnel 4.17
    stunnel stunnel 4.18
    stunnel stunnel 4.19
    stunnel stunnel 4.20
    stunnel stunnel 4.21
    stunnel stunnel 4.22
    stunnel stunnel 4.23
    stunnel stunnel 3.8
    stunnel stunnel 4.0
    stunnel stunnel 3.10
    stunnel stunnel 3.11
    stunnel stunnel 3.12
    stunnel stunnel 3.13
    stunnel stunnel 3.14
    stunnel stunnel 3.15
    stunnel stunnel 3.16
    stunnel stunnel 3.17
    stunnel stunnel 3.18
    stunnel stunnel 3.19
    stunnel stunnel 3.20
    stunnel stunnel 3.21
    stunnel stunnel 3.21a
    stunnel stunnel 3.21b
    stunnel stunnel 3.21c
    stunnel stunnel 3.22
    stunnel stunnel 3.23
    stunnel stunnel 3.24
    stunnel stunnel 3.25
    stunnel stunnel 3.26
    stunnel stunnel 3.4a
    stunnel stunnel 3.5
    stunnel stunnel 3.6
    stunnel stunnel 3.7
    stunnel stunnel 3.8 p1
    stunnel stunnel 3.8 p2
    stunnel stunnel 3.8 p3
    stunnel stunnel 3.8 p4
    stunnel stunnel 3.9
    stunnel stunnel 4.01
    stunnel stunnel 4.02
    stunnel stunnel 4.03
    stunnel stunnel 4.04
    stunnel stunnel 4.05
    stunnel stunnel 4.06
    stunnel stunnel 4.07
    stunnel stunnel 4.08
    stunnel stunnel 4.09
    stunnel stunnel 4.10
    stunnel stunnel 4.11
    stunnel stunnel 4.12
    stunnel stunnel 4.13
    stunnel stunnel 4.14
    stunnel stunnel 4.15
    stunnel stunnel 4.16
    stunnel stunnel 4.17
    stunnel stunnel 4.18
    stunnel stunnel 4.19
    stunnel stunnel 4.20
    stunnel stunnel 4.21
    stunnel stunnel 4.22
    stunnel stunnel 4.23
    gentoo linux *
    mandrakesoft mandrake linux 2007.1
    mandrakesoft mandrake linux 2008.0
    mandrakesoft mandrake linux 2008.0
    mandrakesoft mandrake linux 2008.1 x86_64
    mandrakesoft mandrake linux 2007.1
    mandrakesoft mandrake linux 2008.1