CVE-2019-9511
HIGH severity · CVSS 7.5 · Uncontrolled resource consumption
7.5CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)14%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products we track (3)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Additional information
- NVD record
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00031.htmlAdvisory
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00032.htmlAdvisory
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00035.htmlAdvisory
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00003.htmlAdvisory
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00005.htmlAdvisory
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00014.htmlAdvisory
- https://access.redhat.com/errata/RHSA-2019:2692Advisory
- https://access.redhat.com/errata/RHSA-2019:2745Advisory