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CVE-2017-5650

Improper Resource Shutdown or Release in Apache Tomcat

7.5 HighFix available

In Apache Tomcat 9.0.0.M1 to 9.0.0.M18 and 8.5.0 to 8.5.12, the handling of an HTTP/2 GOAWAY frame for a connection did not close streams associated with that connection that were currently waiting for a WINDOW_UPDATE before allowing the application to write more data. These waiting streams each consumed a thread. A malicious client could therefore construct a series of HTTP/2 requests that would consume all available processing threads.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

8.28%Up 0.1 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 7.5

In Apache Tomcat 9.0.0.M1 to 9.0.0.M18 and 8.5.0 to 8.5.12, the handling of an HTTP/2 GOAWAY frame for a connection did not close streams associated with that connection that were currently waiting for a WINDOW_UPDATE before allowing the application to write more data. These waiting streams each consumed a thread. A malicious client could therefore construct a series of HTTP/2 requests that would consume all available processing threads.

Record
CVE-2017-5650
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness
CWE-404
Updated
2026-11-02
CVE List No score

In Apache Tomcat 9.0.0.M1 to 9.0.0.M18 and 8.5.0 to 8.5.12, the handling of an HTTP/2 GOAWAY frame for a connection did not close streams associated with that connection that were currently waiting for a WINDOW_UPDATE before allowing the application to write more data. These waiting streams each consumed a thread. A malicious client could therefore construct a series of HTTP/2 requests that would consume all available processing threads.

Record
CVE-2017-5650
Updated
2026-11-02
EUVDEUVD-2022-3312 No score

In Apache Tomcat 9.0.0.M1 to 9.0.0.M18 and 8.5.0 to 8.5.12, the handling of an HTTP/2 GOAWAY frame for a connection did not close streams associated with that connection that were currently waiting for a WINDOW_UPDATE before allowing the application to write more data. These waiting streams each consumed a thread. A malicious client could therefore construct a series of HTTP/2 requests that would consume all available processing threads.

Record
EUVD-2022-3312
Updated
2026-11-03
GitHub AdvisoriesGHSA-9785-w233-x6hv 7.5

Improper Resource Shutdown or Release in Apache Tomcat

In Apache Tomcat 9.0.0.M1 to 9.0.0.M18 and 8.5.0 to 8.5.12, the handling of an HTTP/2 GOAWAY frame for a connection did not close streams associated with that connection that were currently waiting for a WINDOW_UPDATE before allowing the application to write more data. These waiting streams each consumed a thread. A malicious client could therefore construct a series of HTTP/2 requests that would consume all available processing threads.

Record
GHSA-9785-w233-x6hv
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-404
Updated
2026-11-02
OSV 7.5

In Apache Tomcat 9.0.0.M1 to 9.0.0.M18 and 8.5.0 to 8.5.12, the handling of an HTTP/2 GOAWAY frame for a connection did not close streams associated with that connection that were currently waiting for a WINDOW_UPDATE before allowing the application to write more data. These waiting streams each consumed a thread. A malicious client could therefore construct a series of HTTP/2 requests that would consume all available processing threads.

Record
CVE-2017-5650
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVGHSA-9785-w233-x6hv 7.5

Improper Resource Shutdown or Release in Apache Tomcat

In Apache Tomcat 9.0.0.M1 to 9.0.0.M18 and 8.5.0 to 8.5.12, the handling of an HTTP/2 GOAWAY frame for a connection did not close streams associated with that connection that were currently waiting for a WINDOW_UPDATE before allowing the application to write more data. These waiting streams each consumed a thread. A malicious client could therefore construct a series of HTTP/2 requests that would consume all available processing threads.

Record
GHSA-9785-w233-x6hv
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-404
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
org.apache.tomcat:tomcat
Maven
9.0.0.M1 to 9.0.0.M18
9.0.0.M19
org.apache.tomcat:tomcat
Maven
8.5.0 to 8.5.12
8.5.13
org.apache.tomcat:tomcat
Maven
9.0.0.M1 up to 9.0.0.M19, plus listed versions
9.0.0.M109.0.0.M119.0.0.M139.0.0.M159.0.0.M17
Show 6 moreShow less
9.0.0.M189.0.0.M39.0.0.M49.0.0.M69.0.0.M89.0.0.M9
9.0.0.M19
org.apache.tomcat:tomcat
Maven
8.5.0 up to 8.5.13, plus listed versions
8.5.118.5.128.5.28.5.38.5.4
Show 4 moreShow less
8.5.58.5.68.5.88.5.9
8.5.13

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2017-5650 is a high vulnerability (CVSS 7.5) in Apache Tomcat, published April 17, 2017. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 8.28%, the 94th percentile. Fixed in org.apache.tomcat:tomcat 9.0.0.M19.

References

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