VDB
CVE-2019-9515
CVE-2019-9515
PUBLISHED
CVSS 7.5 HIGH
Some HTTP/2 implementations are vulnerable to a settings flood, potentially leading to a denial of service. The attacker sends a stream of SETTINGS frames to the peer. Since the RFC requires that the peer reply with one acknowledgement per SETTINGS frame, an empty SETTINGS frame is almost equivalent in behavior to a ping. Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both.
EPSS 87.40% · 99.7th percentile
Risk Scores
CVSS 3.0
7.5
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score
87.40%
99.7th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:24.04:LTS | grpc | 1.51.1-4, 1.51.1-3build4, 1.51.1-4.1build5 |
| Ubuntu:25.10 | golang-google-grpc | 0, 1.64.0-6, 1.64.0-7 |
| Ubuntu:16.04:LTS | trafficserver | 5.3.0-2ubuntu2, 5.3.0-2ubuntu1, 0 |
| Ubuntu:20.04:LTS | twisted | 18.9.0-6build1, 0, 18.9.0-3ubuntu1 |
| Ubuntu:25.10 | grpc | 0, 1.51.1-6, 1.51.1-6build1 |
| Ubuntu:18.04:LTS | trafficserver | 7.0.0-5, 7.1.2+ds-2build1, * |
| Ubuntu:18.04:LTS | golang-google-grpc | 1.6.0-3ubuntu0.18.04.1, 1.6.0-3, 0 |
| Ubuntu:Pro:18.04:LTS | h2o | 2.2.4+dfsg-1ubuntu0.1~esm2, 2.2.4+dfsg-1, 2.2.3+dfsg-2 |
| Ubuntu:20.04:LTS | golang-google-grpc | 0, 1.22.1-1ubuntu1 |
| Ubuntu:Pro:18.04:LTS | netty | 1:4.1.7-4, 1:4.1.7-4ubuntu0.1, 0 |
| Ubuntu:18.04:LTS | grpc | 1.3.2-1ubuntu1, 0, 1.3.2-1 |
| Ubuntu:20.04:LTS | grpc | 1.16.1-1ubuntu5, 0, 1.16.1-1ubuntu1 |
| Ubuntu:16.04:LTS | golang-google-grpc | 0, 0.0~git20150514.0.f5ebd86-1, 0.0~git20150514.0.f5ebd86-2 |
| Ubuntu:Pro:24.04:LTS | golang-google-grpc | 1.38.0+really1.33.3-1ubuntu0.24.04.1, 1.38.0+really1.33.3-1ubuntu0.24.04.2, 1.38.0+really1.33.3-1ubuntu0.24.04.2+esm1 |
| Ubuntu:16.04:LTS | grpc | 0, 0.10.2-1, 0.11.1-1 |
| Ubuntu:22.04:LTS | golang-google-grpc | 1.29.1-0ubuntu1, 0 |
| Ubuntu:22.04:LTS | grpc | 1.30.2-3, 0, 1.30.2-3build5 |
| Ubuntu:18.04:LTS | twisted | 17.9.0-1, 17.9.0-2, 0 |
Timeline
- CVE Published
- Apr 14, 2021 EPSS Score
- Aug 24, 2021 EPSS Score
- Oct 4, 2021 PoC Published
- Dec 27, 2021 EPSS Score
- Feb 4, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- May 2, 2022 EPSS Score
- Sep 5, 2022 EPSS Score
- Jan 8, 2023 EPSS Score
- Mar 11, 2023 EPSS Score
- Jun 17, 2023 EPSS Score
References
- https://ubuntu.com/security/CVE-2019-9515 third-party-advisory
- https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-002.md third-party-advisory
- https://netty.io/news/2019/08/13/4-1-39-Final.html third-party-advisory
- http://blog.kazuhooku.com/2019/08/h2o-version-226-230-beta2-released.html third-party-advisory
- https://github.com/netty/netty/pull/9460 third-party-advisory
- https://labs.twistedmatrix.com/2019/11/twisted-19100-released.html third-party-advisory
- https://ubuntu.com/security/notices/USN-4308-1 vendor-advisory
- https://ubuntu.com/security/notices/USN-4866-1 vendor-advisory
- https://www.cve.org/CVERecord?id=CVE-2019-9515 third-party-advisory