CVE-2019-20794

תיאור (מקור, אנגלית)

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.

מדדים

CVSS 3.1

4.7 (MEDIUM) מקור הציון: NVD CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-772

מוצרים מושפעים

linux: linux kernel

קישורים

• https://github.com/sargun/fuse-example ExploitThird Party Advisory
• https://sourceforge.net/p/fuse/mailman/message/36598753/ ExploitThird Party Advisory
• https://github.com/sargun/fuse-example ExploitThird Party Advisory
• https://sourceforge.net/p/fuse/mailman/message/36598753/ ExploitThird Party Advisory
• http://www.openwall.com/lists/oss-security/2020/08/24/1 Mailing ListThird Party Advisory
• https://security.netapp.com/advisory/ntap-20200608-0001/ Third Party Advisory
• http://www.openwall.com/lists/oss-security/2020/08/24/1 Mailing ListThird Party Advisory
• https://security.netapp.com/advisory/ntap-20200608-0001/ Third Party Advisory