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CVE-2019-9515

HIGHCVSS 7.5/10EPSS 87.81%

Last modified

CVE-2019-9515 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 87.81% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
87.81%

99.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
AppleSwiftnio>= 1.0.0, <= 1.4.0
ApacheTraffic Server>= 6.0.0, <= 6.2.3
ApacheTraffic Server>= 7.0.0, <= 7.1.6
ApacheTraffic Server>= 8.0.0, <= 8.0.3
CanonicalUbuntu Linux16.04
CanonicalUbuntu Linux18.04
CanonicalUbuntu Linux19.04
DebianDebian Linux9.0
DebianDebian Linux10.0
SynologySkynasAll versions
SynologyDiskstation Manager6.2
SynologyVs960hd FirmwareAll versions
FedoraprojectFedora29
FedoraprojectFedora30
OpensuseLeap15.0
OpensuseLeap15.1
RedhatJboss Core Services1.0
RedhatJboss Enterprise Application Platform7.2.0
RedhatJboss Enterprise Application Platform7.3.0
RedhatOpenshift Container Platform4.1
RedhatOpenshift Service Mesh1.0
RedhatOpenstack14
RedhatQuay3.0.0
RedhatSingle Sign-On7.3
RedhatSoftware Collections1.0
RedhatEnterprise Linux8.0
OracleGraalvm19.2.0
McafeeWeb Gateway>= 7.7.2.0, < 7.7.2.24
McafeeWeb Gateway>= 7.8.2.0, < 7.8.2.13
McafeeWeb Gateway>= 8.1.0, < 8.2.0
F5Big-Ip Local Traffic Manager>= 11.6.1, < 11.6.5.1
F5Big-Ip Local Traffic Manager>= 12.1.0, < 12.1.5.1
F5Big-Ip Local Traffic Manager>= 13.1.0, < 13.1.3.2
F5Big-Ip Local Traffic Manager>= 14.0.0, < 14.0.1.1
F5Big-Ip Local Traffic Manager>= 14.1.0, < 14.1.2.1
F5Big-Ip Local Traffic Manager>= 15.0.0, < 15.0.1.1
NodejsNode.Js>= 8.0.0, <= 8.8.1
NodejsNode.Js>= 8.9.0, < 8.16.1
NodejsNode.Js>= 10.0.0, <= 10.12.0
NodejsNode.Js>= 10.13.0, < 10.16.3
NodejsNode.Js>= 12.0.0, < 12.8.1

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2019-9515?
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.
How severe is CVE-2019-9515?
CVE-2019-9515 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 87.81% probability of exploitation in the next 30 days.
How do I fix CVE-2019-9515?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST