Vulnerability Name:

CVE-2011-0935 (CCN-66838)

Assigned:2010-12-28
Published:2010-12-28
Updated:2011-04-21
Summary:The PKI functionality in Cisco IOS 15.0 and 15.1 does not prevent permanent caching of certain public keys, which allows remote attackers to bypass authentication and have unspecified other impact by leveraging an IKE peer relationship in which a key was previously valid but later revoked, aka Bug ID CSCth82164, a different vulnerability than CVE-2010-4685.
CVSS score derived from:

http://www.cisco.com/en/US/docs/ios/15_1s/release/notes/15_1s_caveats_15_1_2s.html
CVSS v3 Severity:5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): Low
Availibility (A): None
CVSS v2 Severity:10.0 High (CVSS v2 Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C)
7.4 High (Temporal CVSS v2 Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C/E:U/RL:OF/RC:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N)
3.7 Low (CCN Temporal CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N/E:U/RL:OF/RC:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
Vulnerability Type:CWE-310
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2011-0935

Source: CCN
Type: SA44363
Cisco IOS OCSP Revoked Certificate Security Issue

Source: CCN
Type: Cisco Web site
Release Notes for Cisco 800 Series Routers with Cisco IOS Release 15.0(1)XA

Source: CONFIRM
Type: UNKNOWN
http://www.cisco.com/en/US/docs/ios/15_1/release/notes/151-2TCAVS.html

Source: CONFIRM
Type: UNKNOWN
http://www.cisco.com/en/US/docs/ios/15_1s/release/notes/15_1s_caveats_15_1_1s.html

Source: BID
Type: UNKNOWN
47407

Source: CCN
Type: BID-47407
Cisco IOS PKI Functionality Security Bypass Vulnerability

Source: XF
Type: UNKNOWN
ciscoios-pki-sec-bypass(66838)

Vulnerable Configuration:Configuration 1:
  • cpe:/o:cisco:ios:15.0:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios:15.1:*:*:*:*:*:*:*

  • Configuration CCN 1:
  • cpe:/o:cisco:ios:15.0:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios:15.1:*:*:*:*:*:*:*

  • * Denotes that component is vulnerable
    BACK
    cisco ios 15.0
    cisco ios 15.1
    cisco ios 15.0
    cisco ios 15.1