|Description||The fix for CVE-2019-0199 was incomplete and did not address HTTP/2 connection window exhaustion on write in Apache Tomcat versions 9.0.0.M1 to 9.0.19 and 8.5.0 to 8.5.40 . By not sending WINDOW_UPDATE messages for the connection window (stream 0) clients were able to cause server-side threads to block eventually leading to thread exhaustion and a DoS.|
|Source||CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)|
|Debian Bugs||30873, 930872, 931131|
Vulnerable and fixed packages
The table below lists information on source packages.
|tomcat9 (PTS)||buster, buster (security)||9.0.31-1~deb10u6||fixed|
|bullseye (security), bullseye||9.0.43-2~deb11u3||fixed|
The information below is based on the following data on fixed versions.
[stretch] - tomcat8 <not-affected> (Incomplete fix for CVE-2019-0199 not applied)
[jessie] - tomcat8 <not-affected> (HTTP/2 support not implemented)