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CVE-2019-9515 PUBLISHED

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 10.39% · 93.2th percentile

Risk Scores

EPSS Score
10.39%
93.2th percentile

Affected Products

VendorProductVersions
Ubuntu:24.04:LTSgrpc1.51.1-4, 1.51.1-4build1, 0
Ubuntu:25.10golang-google-grpc1.64.0-7, 1.64.0-6, 0
Ubuntu:16.04:LTStrafficserver5.3.0-2ubuntu2, 0, 5.3.0-2ubuntu1
Ubuntu:20.04:LTStwisted18.9.0-5, 18.9.0-6build1, 0
Ubuntu:25.10grpc1.51.1-6build1, 1.51.1-6, 0
Ubuntu:18.04:LTStrafficserver7.1.2+ds-2build1, 7.1.2+ds-2, 7.0.0-5
Ubuntu:18.04:LTSgolang-google-grpc1.0.4-1, 0, 1.6.0-3
Ubuntu:Pro:18.04:LTSh2o2.2.4+dfsg-1ubuntu0.1~esm2, 2.2.4+dfsg-1build1, 0
Ubuntu:20.04:LTSgolang-google-grpc1.22.1-1ubuntu1, 0
Ubuntu:Pro:18.04:LTSnetty1:4.1.7-4ubuntu0.1~esm1, 0, 1:4.1.7-4
Ubuntu:18.04:LTSgrpc0, 1.3.2-1, 1.3.2-1ubuntu1
Ubuntu:20.04:LTSgrpc1.16.1-1ubuntu4, 1.16.1-1ubuntu5, 0
Ubuntu:16.04:LTSgolang-google-grpc0, 0.0~git20150514.0.f5ebd86-1, 0.0~git20150514.0.f5ebd86-2
Ubuntu:Pro:24.04:LTSgolang-google-grpc0, 1.38.0+really1.33.3-1build1, 1.38.0+really1.33.3-1ubuntu0.24.04.1
Ubuntu:16.04:LTSgrpc0.11.1-1, 0.10.2-1, 0
Ubuntu:22.04:LTSgolang-google-grpc1.29.1-0ubuntu1, 0
Ubuntu:22.04:LTSgrpc1.30.2-3build1, 1.30.2-3build6, 1.30.2-3build5
Ubuntu:18.04:LTStwisted17.9.0-1, 0, 17.9.0-2

Timeline

References

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