Inconsistent interpretation of HTTP requests in Virtual Application Delivery Controller (formerly Virtual Traffic Manager) - CVE-2021-31922
Published: May 11, 2021
Vulnerability identifier: #VU53124
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-31922
CWE-ID: CWE-444
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Ivanti
Affected software:
Virtual Application Delivery Controller (formerly Virtual Traffic Manager)
Virtual Application Delivery Controller (formerly Virtual Traffic Manager)
Detailed vulnerability description
The vulnerability allows a remote attacker to preform HTTP request smuggling attacks.
The vulnerability exists due to improper validation of HTTP/2 requests. A remote attacker can send a specially crafted HTTP/2 request to the server and smuggle arbitrary HTTP headers.
Successful exploitation of vulnerability may allow an attacker to poison HTTP cache and perform phishing attacks.
How to mitigate CVE-2021-31922
Install updates from vendor's website.