VulnerabilityModified
CVE-2019-20794
An issue was discovered in the Linux kernel 4.18 through 5.6.11 when unprivileged user namespaces are allowed.
MEDIUM 4.7EPSS 0.51%
Does this matter?
Lower severity and a low EPSS score (0.51%). Track it; it rarely justifies an emergency change on its own.
Description
An issue was discovered in the Linux kernel 4.18 through 5.6.11 when unprivileged user namespaces are allowed. A user can create their own PID namespace, and mount a FUSE filesystem. Upon interaction with this FUSE filesystem, if the userspace component is terminated via a kill of the PID namespace's pid 1, it will result in a hung task, and resources being permanently locked up until system reboot. This can result in resource exhaustion.
- CVSS 3.1
- 4.7 MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.51% probability · 42th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-772
- Affected
- linux/linux kernel
- Source
- cve@mitre.org
References
- http://www.openwall.com/lists/oss-security/2020/08/24/1Mailing List, Third Party Advisory
- https://github.com/sargun/fuse-exampleExploit, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20200608-0001/Third Party Advisory
- https://sourceforge.net/p/fuse/mailman/message/36598753/Exploit, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/08/24/1Mailing List, Third Party Advisory
- https://github.com/sargun/fuse-exampleExploit, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20200608-0001/Third Party Advisory
- https://sourceforge.net/p/fuse/mailman/message/36598753/Exploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.