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: 8.7 [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]
CVE-ID: CVE-2021-31922
CWE-ID: CWE-444
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Virtual Application Delivery Controller (formerly Virtual Traffic Manager)
How to mitigate CVE-2021-31922
Install updates from vendor's website.
Virtual Application Delivery Controller (formerly Virtual Traffic Manager) - addressed in versions 18.2 r3, 19.2 r4, 20.1 r2, 20.2 r1, 20.3 r1