CVE-2019-9518
HIGH severity · CVSS 7.5 · Uncontrolled resource consumption
7.5CVSS HIGH
Summary
Some HTTP/2 implementations are vulnerable to a flood of empty frames, potentially leading to a denial of service. The attacker sends a stream of frames with an empty payload and without the end-of-stream flag. These frames can be DATA, HEADERS, CONTINUATION and/or PUSH_PROMISE. The peer spends time processing each frame disproportionate to attack bandwidth. This can consume excess CPU.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)25%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products we track (1)
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://seclists.org/fulldisclosure/2019/Aug/16Advisory
- https://access.redhat.com/errata/RHSA-2019:2925Advisory
- https://access.redhat.com/errata/RHSA-2019:2939Advisory
- https://access.redhat.com/errata/RHSA-2019:2955Advisory
- https://access.redhat.com/errata/RHSA-2019:3892Advisory
- https://access.redhat.com/errata/RHSA-2019:4352Advisory