CVE-2020-29373

medium
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

An issue was discovered in fs/io_uring.c in the Linux kernel before 5.6. It unsafely handles the root directory during path lookups, and thus a process inside a mount namespace can escape to unintended filesystem locations, aka CID-ff002b30181d.

References

https://bugs.chromium.org/p/project-zero/issues/detail?id=2011

https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ff002b30181d30cdfbca316dadd099c3ca0d739c

Details

Source: MITRE

Published: 2020-11-28

Updated: 2020-12-02

Type: CWE-22

Risk Information

CVSS v2

Base Score: 2.1

Vector: AV:L/AC:L/Au:N/C:P/I:N/A:N

Impact Score: 2.9

Exploitability Score: 3.9

Severity: LOW

CVSS v3

Base Score: 6.5

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Impact Score: 4

Exploitability Score: 2

Severity: MEDIUM

Vulnerable Software

Configuration 1

OR

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Tenable Plugins

View all (4 total)

IDNameProductFamilySeverity
146282openSUSE Security Update : RT kernel (openSUSE-2021-242)NessusSuSE Local Security Checks
high
145320openSUSE Security Update : the Linux Kernel (openSUSE-2021-60)NessusSuSE Local Security Checks
medium
145025SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2021:0117-1)NessusSuSE Local Security Checks
medium
144959SUSE SLES15 Security Update : kernel (SUSE-SU-2021:0108-1)NessusSuSE Local Security Checks
medium