Vulnerability identifier: #VU20992
Vulnerability risk: Medium
Exploitation vector: Network
Exploit availability: No
Vendor: Apache Foundation
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to incomplete fix for SB2019020812 when processing HTTP/2 requests. A remote attacker can perform denial of service attack by not sending WINDOW_UPDATE messages for the connection window (stream 0).
Install updates from vendor's website.
Vulnerable software versions
Apache Tomcat: 9.0.0 - 9.0.19, 8.5.0 - 8.5.39
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.