CVE-2019-9515
python3-twisted: Some HTTP/2 implementations are vulnerable to a settings flood, potentiallyleading to a denial of service
CVE-2019-9515 is fixed in 19 products on 1 platform, first by libnetty-java 1:4.1.7-4ubuntu0.1+esm1, released August 12, 2019. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
7.5
Medium
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.8729
99th percentile
Some HTTP/2 implementations are vulnerable to a settings flood, potentiallyleading to a denial of service. The attacker sends a stream of SETTINGSframes to the peer. Since the RFC requires that the peer reply with oneacknowledgement per SETTINGS frame, an empty SETTINGS frame is almostequivalent in behavior to a ping. Depending on how efficiently this data isqueued, this can consume excess CPU, memory, or both.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libnetty-java · Ubuntu 18.04.6 LTS (bionic) | 1:4.1.7-4ubuntu0.1+esm1 | libnetty-java 1:4.1.7-4ubuntu0.1+esm1 | Aug 12, 2019 |
| nodejs · RHEL 8 | 1:10.16.3-2.module+el8.0.0+4214+49953fda | RHSA-2019:2925 | Sep 30, 2019 |
| nodejs · ol 8 | 1:10.14.1-1.module+el8.0.0+5349+4d6b561f | ELSA-2019-2925 | Sep 30, 2019 |
| nodejs-devel · RHEL 8 | 1:10.16.3-2.module+el8.0.0+4214+49953fda | RHSA-2019:2925 | Sep 30, 2019 |
| nodejs-devel · ol 8 | 1:10.14.1-1.module+el8.0.0+5349+4d6b561f | ELSA-2019-2925 | Sep 30, 2019 |
| nodejs-docs · RHEL 8 | 1:10.16.3-2.module+el8.0.0+4214+49953fda | RHSA-2019:2925 | Sep 30, 2019 |
| nodejs-docs · ol 8 | 1:10.14.1-1.module+el8.0.0+5349+4d6b561f | ELSA-2019-2925 | Sep 30, 2019 |
| nodejs-nodemon · RHEL 8 | 0:1.18.3-1.module+el8+2632+6c5111ed | RHSA-2019:2925 | Sep 30, 2019 |
| nodejs-nodemon · ol 8 | 0:1.18.3-1.module+el8.0.0+5349+4d6b561f | ELSA-2019-2925 | Sep 30, 2019 |
| nodejs-packaging · RHEL 8 | 0:17-3.module+el8+2873+aa7dfd9a | RHSA-2019:2925 | Sep 30, 2019 |
| nodejs-packaging · ol 8 | 0:17-3.module+el8.0.0+5349+4d6b561f | ELSA-2019-2925 | Sep 30, 2019 |
| npm · RHEL 8 | 1:6.9.0-1.10.16.3.2.module+el8.0.0+4214+49953fda | RHSA-2019:2925 | Sep 30, 2019 |
| npm · ol 8 | 1:6.4.1-1.10.14.1.1.module+el8.0.0+5349+4d6b561f | ELSA-2019-2925 | Sep 30, 2019 |
| python-twisted · Ubuntu 18.04.6 LTS (bionic) | 17.9.0-2ubuntu0.1 | python-twisted 17.9.0-2ubuntu0.1 | Mar 12, 2020 |
| python-twisted · Ubuntu 20.04 LTS (focal) | 18.9.0-6ubuntu1 | python-twisted 18.9.0-6ubuntu1 | Aug 12, 2019 |
| python-twisted-bin · Ubuntu 18.04.6 LTS (bionic) | 17.9.0-2ubuntu0.1 | python-twisted-bin 17.9.0-2ubuntu0.1 | Mar 12, 2020 |
| python-twisted-bin · Ubuntu 20.04 LTS (focal) | 18.9.0-6ubuntu1 | python-twisted-bin 18.9.0-6ubuntu1 | Aug 12, 2019 |
| python-twisted-conch · Ubuntu 18.04.6 LTS (bionic) | 1:17.9.0-2ubuntu0.1 | python-twisted-conch 1:17.9.0-2ubuntu0.1 | Mar 12, 2020 |
| python-twisted-conch · Ubuntu 20.04 LTS (focal) | 1:18.9.0-6ubuntu1 | python-twisted-conch 1:18.9.0-6ubuntu1 | Aug 12, 2019 |
| python-twisted-core · Ubuntu 18.04.6 LTS (bionic) | 17.9.0-2ubuntu0.1 | python-twisted-core 17.9.0-2ubuntu0.1 | Mar 12, 2020 |
| python-twisted-core · Ubuntu 20.04 LTS (focal) | 18.9.0-6ubuntu1 | python-twisted-core 18.9.0-6ubuntu1 | Aug 12, 2019 |
| python-twisted-mail · Ubuntu 18.04.6 LTS (bionic) | 17.9.0-2ubuntu0.1 | python-twisted-mail 17.9.0-2ubuntu0.1 | Mar 12, 2020 |
| python-twisted-mail · Ubuntu 20.04 LTS (focal) | 18.9.0-6ubuntu1 | python-twisted-mail 18.9.0-6ubuntu1 | Aug 12, 2019 |
| python-twisted-names · Ubuntu 18.04.6 LTS (bionic) | 17.9.0-2ubuntu0.1 | python-twisted-names 17.9.0-2ubuntu0.1 | Mar 12, 2020 |
| python-twisted-names · Ubuntu 20.04 LTS (focal) | 18.9.0-6ubuntu1 | python-twisted-names 18.9.0-6ubuntu1 | Aug 12, 2019 |
| python-twisted-news · Ubuntu 18.04.6 LTS (bionic) | 17.9.0-2ubuntu0.1 | python-twisted-news 17.9.0-2ubuntu0.1 | Mar 12, 2020 |
| python-twisted-news · Ubuntu 20.04 LTS (focal) | 18.9.0-6ubuntu1 | python-twisted-news 18.9.0-6ubuntu1 | Aug 12, 2019 |
| python-twisted-runner · Ubuntu 18.04.6 LTS (bionic) | 17.9.0-2ubuntu0.1 | python-twisted-runner 17.9.0-2ubuntu0.1 | Mar 12, 2020 |
| python-twisted-runner · Ubuntu 20.04 LTS (focal) | 18.9.0-6ubuntu1 | python-twisted-runner 18.9.0-6ubuntu1 | Aug 12, 2019 |
| python-twisted-web · Ubuntu 18.04.6 LTS (bionic) | 17.9.0-2ubuntu0.1 | python-twisted-web 17.9.0-2ubuntu0.1 | Mar 12, 2020 |
| python-twisted-web · Ubuntu 20.04 LTS (focal) | 18.9.0-6ubuntu1 | python-twisted-web 18.9.0-6ubuntu1 | Aug 12, 2019 |
| python-twisted-words · Ubuntu 18.04.6 LTS (bionic) | 17.9.0-2ubuntu0.1 | python-twisted-words 17.9.0-2ubuntu0.1 | Mar 12, 2020 |
| python-twisted-words · Ubuntu 20.04 LTS (focal) | 18.9.0-6ubuntu1 | python-twisted-words 18.9.0-6ubuntu1 | Aug 12, 2019 |
| python3-twisted · Ubuntu 18.04.6 LTS (bionic) | 17.9.0-2ubuntu0.1 | python3-twisted 17.9.0-2ubuntu0.1 | Mar 12, 2020 |
| python3-twisted · Ubuntu 20.04 LTS (focal) | 18.9.0-6ubuntu1 | python3-twisted 18.9.0-6ubuntu1 | Aug 12, 2019 |
| python3-twisted · Ubuntu 24.10 (oracular) | 18.9.0-6ubuntu1 | python3-twisted 18.9.0-6ubuntu1 | Aug 13, 2019 |
| python3-twisted · Ubuntu 25.04 (plucky) | 18.9.0-6ubuntu1 | python3-twisted 18.9.0-6ubuntu1 | Aug 13, 2019 |
| python3-twisted-bin · Ubuntu 18.04.6 LTS (bionic) | 17.9.0-2ubuntu0.1 | python3-twisted-bin 17.9.0-2ubuntu0.1 | Mar 12, 2020 |
| python3-twisted-bin · Ubuntu 20.04 LTS (focal) | 18.9.0-6ubuntu1 | python3-twisted-bin 18.9.0-6ubuntu1 | Aug 12, 2019 |
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