Vulnerability Name:

CVE-2020-5425 (CCN-191011)

Assigned:2020-10-29
Published:2020-10-29
Updated:2020-11-17
Summary:Single Sign-On for Vmware Tanzu all versions prior to 1.11.3 ,1.12.x versions prior to 1.12.4 and 1.13.x prior to 1.13.1 are vulnerable to user impersonation attack.If two users are logged in to the SSO operator dashboard at the same time, with the same username, from two different identity providers, one can acquire the token of the other and thus operate with their permissions.
Note: Foundation may be vulnerable only if: 1) The system zone is set up to use a SAML identity provider 2) There are internal users that have the same username as users in the external SAML provider 3) Those duplicate-named users have the scope to access the SSO operator dashboard 4) The vulnerability doesn't appear with LDAP because of chained authentication.
CVSS v3 Severity:7.9 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:H)
6.9 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): Low
User Interaction (UI): Required
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): Low
Integrity (I): High
Availibility (A): High
9.1 Critical (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N)
7.9 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/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): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): None
CVSS v2 Severity:4.6 Medium (CVSS v2 Vector: AV:N/AC:H/Au:S/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): High
Authentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
9.4 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:C/I:C/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): None
Vulnerability Type:CWE-287
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2020-5425

Source: XF
Type: UNKNOWN
vmwaretanzu-cve20205425-sec-bypass(191011)

Source: CCN
Type: VMware Tanzu Web site
CVE-2020-5425: User Impersonation possible in Tanzu SSO

Source: CONFIRM
Type: Vendor Advisory
https://tanzu.vmware.com/security/cve-2020-5425

Vulnerable Configuration:Configuration 1:
  • cpe:/a:vmware:single_sign-on_for_tanzu:*:*:*:*:*:*:*:* (Version < 1.11.3)
  • OR cpe:/a:vmware:single_sign-on_for_tanzu:*:*:*:*:*:*:*:* (Version >= 1.12.0 and < 1.12.4)
  • OR cpe:/a:vmware:single_sign-on_for_tanzu:*:*:*:*:*:*:*:* (Version >= 1.13.0 and < 1.13.1)

    • * Denotes that component is vulnerable
    BACK
    vmware single sign-on for tanzu *
    vmware single sign-on for tanzu *
    vmware single sign-on for tanzu *