CVE-2020-5425 User Impersonation possible in Tanzu SSO
Attackers can impersonate users and gain their permissions in VMware Tanzu SSO if specific SAML configurations and duplicate usernames exist.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2020-5425?
CVE-2020-5425 is a high-severity authentication bypass vulnerability in Single Sign-On for VMware Tanzu, published on 31 Oct 2020. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-287
Which versions are affected by CVE-2020-5425?
It affects 1 product.
Products include Vmware Single Sign-on for Tanzu.
How do I fix CVE-2020-5425?
No fix has been published for CVE-2020-5425 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2020-5425 being exploited?
There is no known exploitation of CVE-2020-5425 in the wild and no public exploit code.
Sources
Also known as GHSA-vmxh-mp6w-252x.