CVE-2021-22920 Auth bypass in Citrix ADC, Citrix Gateway
Attackers can hijack SAML authentication to steal valid user sessions, leading to account takeover on Citrix ADC and Gateway devices.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-22920?
CVE-2021-22920 is a medium-severity authentication bypass vulnerability in Citrix ADC, Citrix Gateway, published on 5 Aug 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A vulnerability has been discovered in Citrix ADC (formerly known as NetScaler ADC) and Citrix Gateway (formerly known as NetScaler Gateway), and Citrix SD-WAN WANOP Edition models 4000-WO, 4100-WO, 5000-WO, and 5100-WO. These vulnerabilities, if exploited, could lead to a phishing attack through a SAML authentication hijack to steal a valid user session.
Weakness: CWE-284
Which versions are affected by CVE-2021-22920?
It affects 2 products.
Products include Citrix Application Delivery Management, Citrix Gateway.
How do I fix CVE-2021-22920?
No fix has been published for CVE-2021-22920 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-2021-22920 being exploited?
There is no known exploitation of CVE-2021-22920 in the wild and no public exploit code.
Other vulnerabilities in Citrix ADC, Citrix Gateway
Sources
Also known as GHSA-5w66-9x5w-m57v.