Vulnerability Name:

CVE-2019-12643 (CCN-165955)

Assigned:2019-08-28
Published:2019-08-28
Updated:2019-10-09
Summary:A vulnerability in the Cisco REST API virtual service container for Cisco IOS XE Software could allow an unauthenticated, remote attacker to bypass authentication on the managed Cisco IOS XE device. The vulnerability is due to an improper check performed by the area of code that manages the REST API authentication service. An attacker could exploit this vulnerability by submitting malicious HTTP requests to the targeted device. A successful exploit could allow the attacker to obtain the token-id of an authenticated user. This token-id could be used to bypass authentication and execute privileged actions through the interface of the REST API virtual service container on the affected Cisco IOS XE device. The REST API interface is not enabled by default and must be installed and activated separately on IOS XE devices. See the Details section for more information.
CVSS v3 Severity:10.0 Critical (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H)
8.7 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
10.0 Critical (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H)
8.7 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
CVSS v2 Severity:10.0 High (CVSS v2 Vector: AV:N/AC:L/Au:N/C:C/I:C/A: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
10.0 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
Vulnerability Type:CWE-287
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2019-12643

Source: XF
Type: UNKNOWN
ciscoios-cve201912643-sec-bypass(165955)

Source: CCN
Type: Cisco Security Advisory cisco-sa-20190828-iosxe-rest-auth-bypass
Cisco REST API Container for IOS XE Software Authentication Bypass Vulnerability

Source: CISCO
Type: Vendor Advisory
20190828 Cisco REST API Container for IOS XE Software Authentication Bypass Vulnerability

Vulnerable Configuration:Configuration 1:
  • cpe:/o:cisco:ios_xe:15.5(3)s3.16:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.6.5:*:*:*:*:*:*:*
  • AND
  • cpe:/h:cisco:4221_integrated_services_router:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:4321_integrated_services_router:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:4331_integrated_services_router:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:4351_integrated_services_router:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:4431_integrated_services_router:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:4451-x_integrated_services_router:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:cloud_services_router_1000v:-:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/o:cisco:ios_xe:*:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asr_1000_series:-:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    cisco ios xe 15.5(3)s3.16
    cisco ios xe 16.6.5
    cisco 4221 integrated services router -
    cisco 4321 integrated services router -
    cisco 4331 integrated services router -
    cisco 4351 integrated services router -
    cisco 4431 integrated services router -
    cisco 4451-x integrated services router -
    cisco cloud services router 1000v -
    cisco ios xe *
    cisco asr 1000 series -