CVE-2019-19922
kernel: when cpu.cfs_quota_us is used allows attackers to cause a denial of service against non-cpu-bound applications
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
1Exploited in Wild
-Decision
Descriptions
kernel/sched/fair.c in the Linux kernel before 5.3.9, when cpu.cfs_quota_us is used (e.g., with Kubernetes), allows attackers to cause a denial of service against non-cpu-bound applications by generating a workload that triggers unwanted slice expiration, aka CID-de53fd7aedb1. (In other words, although this slice expiration would typically be seen with benign workloads, it is possible that an attacker could calculate how many stray requests are required to force an entire Kubernetes cluster into a low-performance state caused by slice expiration, and ensure that a DDoS attack sent that number of stray requests. An attack does not affect the stability of the kernel; it only causes mismanagement of application execution.)
El archivo kernel/sched/fair.c en el kernel de Linux versiones anteriores a 5.3.9, cuando la función cpu.cfs_quota_us es usada (por ejemplo, con Kubernetes), permite a atacantes causar una denegación de servicio contra aplicaciones no vinculadas a la CPU al generar una carga de trabajo que desencadena vencimiento de corte no deseado, también se conoce como CID-de53fd7aedb1. (En otras palabras, aunque esta caducidad de corte se vería típicamente con cargas de trabajo benignas, es posible que un atacante pueda calcular cuántas peticiones extraviadas se requieren para forzar a un clúster Kubernetes completo a un estado de bajo rendimiento causado por la caducidad de corte, y garantizar que un ataque DDoS envió esa cantidad de peticiones perdidas. Un ataque no afecta la estabilidad del kernel; solo causa una gestión inapropiada de una ejecución de la aplicación).
A flaw was found in the Linux kernel’s scheduler, where it can allow attackers to cause a denial of service against non-CPU-bound applications by generating a workload that triggers unwanted scheduling slice expiration. A local attacker who can trigger a specific workload type could abuse this technique to trigger a system to be seen as degraded, and possibly trigger workload-rebalance in systems that use the slice-expiration metric as a measure of system health.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2019-12-22 CVE Reserved
- 2019-12-22 CVE Published
- 2023-08-21 EPSS Updated
- 2024-08-05 CVE Updated
- 2024-08-05 First Exploit
- ---------- Exploited in Wild
- ---------- KEV Due Date
CWE
- CWE-400: Uncontrolled Resource Consumption
CAPEC
References (11)
URL | Tag | Source |
---|---|---|
https://lists.debian.org/debian-lts-announce/2020/01/msg00013.html | Mailing List | |
https://security.netapp.com/advisory/ntap-20200204-0002 | Third Party Advisory |
URL | Date | SRC |
---|---|---|
https://relistan.com/the-kernel-may-be-slowing-down-your-app | 2024-08-05 |
URL | Date | SRC |
---|---|---|
https://usn.ubuntu.com/4226-1 | 2022-12-14 | |
https://access.redhat.com/security/cve/CVE-2019-19922 | 2020-04-28 | |
https://bugzilla.redhat.com/show_bug.cgi?id=1792512 | 2020-04-28 |
Affected Vendors, Products, and Versions
Vendor | Product | Version | Other | Status | ||||||
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Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | < 5.3.9 Search vendor "Linux" for product "Linux Kernel" and version " < 5.3.9" | - |
Affected
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Oracle Search vendor "Oracle" | Sd-wan Edge Search vendor "Oracle" for product "Sd-wan Edge" | 8.2 Search vendor "Oracle" for product "Sd-wan Edge" and version "8.2" | - |
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Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 18.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "18.04" | lts |
Affected
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Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 19.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "19.04" | - |
Affected
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Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 8.0 Search vendor "Debian" for product "Debian Linux" and version "8.0" | - |
Affected
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Netapp Search vendor "Netapp" | Active Iq Unified Manager Search vendor "Netapp" for product "Active Iq Unified Manager" | - | vmware_vsphere |
Affected
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Netapp Search vendor "Netapp" | Cloud Backup Search vendor "Netapp" for product "Cloud Backup" | - | - |
Affected
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Netapp Search vendor "Netapp" | Data Availability Services Search vendor "Netapp" for product "Data Availability Services" | - | - |
Affected
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Netapp Search vendor "Netapp" | E-series Santricity Os Controller Search vendor "Netapp" for product "E-series Santricity Os Controller" | >= 11.0 <= 11.70.2 Search vendor "Netapp" for product "E-series Santricity Os Controller" and version " >= 11.0 <= 11.70.2" | - |
Affected
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Netapp Search vendor "Netapp" | Fas\/aff Baseboard Management Controller Search vendor "Netapp" for product "Fas\/aff Baseboard Management Controller" | - | - |
Affected
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Netapp Search vendor "Netapp" | Hci Baseboard Management Controller Search vendor "Netapp" for product "Hci Baseboard Management Controller" | h610s Search vendor "Netapp" for product "Hci Baseboard Management Controller" and version "h610s" | - |
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Netapp Search vendor "Netapp" | Solidfire \& Hci Management Node Search vendor "Netapp" for product "Solidfire \& Hci Management Node" | - | - |
Affected
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Netapp Search vendor "Netapp" | Steelstore Cloud Integrated Storage Search vendor "Netapp" for product "Steelstore Cloud Integrated Storage" | - | - |
Affected
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Netapp Search vendor "Netapp" | Aff Baseboard Management Controller Search vendor "Netapp" for product "Aff Baseboard Management Controller" | a700 Search vendor "Netapp" for product "Aff Baseboard Management Controller" and version "a700" | - |
Affected
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Netapp Search vendor "Netapp" | Solidfire Baseboard Management Controller Search vendor "Netapp" for product "Solidfire Baseboard Management Controller" | - | - |
Affected
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