CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
Low
EPSS
Percentile
15.5%
If an HTTP/2 connection gets TCP congested, when an idle timeout occurs the HTTP/2 session is marked as closed, and then a GOAWAY frame is queued to be written.
However it is not written because the connection is TCP congested.
When another idle timeout period elapses, it is then supposed to hard close the connection, but it delegates to the HTTP/2 session which reports that it has already been closed so it does not attempt to hard close the connection.
This leaves the connection in ESTABLISHED state (i.e. not closed), TCP congested, and idle.
An attacker can cause many connections to end up in this state, and the server may run out of file descriptors, eventually causing the server to stop accepting new connections from valid clients.
The client may also be impacted (if the server does not read causing a TCP congestion), but the issue is more severe for servers.
Patched versions:
Disable HTTP/2 and HTTP/3 support until you can upgrade to a patched version of Jetty.
HTTP/1.x is not affected.
www.openwall.com/lists/oss-security/2024/03/20/2
github.com/jetty/jetty.project
github.com/jetty/jetty.project/commit/0839a208cdc3fcfe25206a77af59ba9fda260188
github.com/jetty/jetty.project/commit/b953871c9a5ff4fbca4a2499848f75182dbd9810
github.com/jetty/jetty.project/issues/11256
github.com/jetty/jetty.project/issues/11259
github.com/jetty/jetty.project/security/advisories/GHSA-rggv-cv7r-mw98
lists.debian.org/debian-lts-announce/2024/04/msg00002.html
nvd.nist.gov/vuln/detail/CVE-2024-22201
security.netapp.com/advisory/ntap-20240329-0001
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
Low
EPSS
Percentile
15.5%