CVE-2019-9511
What it is
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.
At a glance
- Exploitability
- Can be exploited over the network without logging in. High risk of service disruption.
- Exploit odds
- 59.5% chance of exploitation in the next 30 days (EPSS). Higher than most.
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 59.5% in the next 30 days (EPSS).
- Severity: 7.5 HIGH (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 59.5% · EPSS, next 30 days
- Weakness
- CWE-400 · Uncontrolled resource consumption
- Record status
- Modified
Affected
- Apple Swiftnio ≤ 1.4.0
- Apache Traffic Server ≤ 6.2.3
- Apache Traffic Server ≤ 7.1.6
- Apache Traffic Server ≤ 8.0.3
- Canonical Ubuntu Linux 16.04
- Canonical Ubuntu Linux 18.04
- Canonical Ubuntu Linux 19.04
- Debian Linux 9.0
Attack profile CVSS 3.1 · 7.5
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2019-9511.md and follow it. Check whether this project is affected by CVE-2019-9511. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
References
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00031.html
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00032.html
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00035.html
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00003.html
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00005.html
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00014.html
- https://access.redhat.com/errata/RHSA-2019:2692
- https://access.redhat.com/errata/RHSA-2019:2745
- https://access.redhat.com/errata/RHSA-2019:2746
- https://access.redhat.com/errata/RHSA-2019:2775
- https://access.redhat.com/errata/RHSA-2019:2799
- https://access.redhat.com/errata/RHSA-2019:2925
- https://access.redhat.com/errata/RHSA-2019:2939
- https://access.redhat.com/errata/RHSA-2019:2949
- https://access.redhat.com/errata/RHSA-2019:2955
- https://access.redhat.com/errata/RHSA-2019:2966
- https://access.redhat.com/errata/RHSA-2019:3041
- https://access.redhat.com/errata/RHSA-2019:3932
- https://access.redhat.com/errata/RHSA-2019:3933
- https://access.redhat.com/errata/RHSA-2019:3935
- https://access.redhat.com/errata/RHSA-2019:4018
- https://access.redhat.com/errata/RHSA-2019:4019
- https://access.redhat.com/errata/RHSA-2019:4020
- https://access.redhat.com/errata/RHSA-2019:4021
- https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-002.md