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CVE-2019-9511

HIGHCVSS 7.5/10EPSS 59.55%

Last modified

CVE-2019-9511 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Some HTTP/2 implementations are vulnerable to window size manipulation and stream prioritization manipulation, potentially leading to a denial of service. The attacker requests a large amount of data from a specified resource over multiple streams. EPSS estimates a 59.55% chance of exploitation in the next 30 days.

Description

Some HTTP/2 implementations are vulnerable to window size manipulation and stream prioritization manipulation, potentially leading to a denial of service. The attacker requests a large amount of data from a specified resource over multiple streams. They manipulate window size and stream priority to force the server to queue the data in 1-byte chunks. 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
59.55%

99.0th 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 Service Mesh1.0
RedhatQuay3.0.0
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
F5Nginx>= 1.9.5, < 1.16.1
F5Nginx>= 1.17.0, <= 1.17.2
OracleEnterprise Communications Broker3.1.0
OracleEnterprise Communications Broker3.2.0
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-2019-9511?
Some HTTP/2 implementations are vulnerable to window size manipulation and stream prioritization manipulation, potentially leading to a denial of service. The attacker requests a large amount of data from a specified resource over multiple streams. They manipulate window size and stream priority to force the server to queue the data in 1-byte chunks. Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both.
How severe is CVE-2019-9511?
CVE-2019-9511 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 59.55% probability of exploitation in the next 30 days.
How do I fix CVE-2019-9511?
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.

Are you affected by CVE-2019-9511?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST