CVE-2020-29660

medium

Description

A locking inconsistency issue was discovered in the tty subsystem of the Linux kernel through 5.9.13. drivers/tty/tty_io.c and drivers/tty/tty_jobctrl.c may allow a read-after-free attack against TIOCGSID, aka CID-c8bcd9c5be24.

References

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c8bcd9c5be24fb9e6132e97da5a35e55a83e36b9

http://www.openwall.com/lists/oss-security/2020/12/10/1

https://lists.fedoraproject.org/archives/list/[email protected]/message/BOB25SU6XUL4TNP7KB63WNZSYTIYFDPP/

https://lists.fedoraproject.org/archives/list/[email protected]/message/MZ7OAKAEFAXQRGBZK4LYUWINCD3D2XCL/

https://security.netapp.com/advisory/ntap-20210122-0001/

https://www.debian.org/security/2021/dsa-4843

https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html

https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html

http://packetstormsecurity.com/files/164950/Kernel-Live-Patch-Security-Notice-LSN-0082-1.html

Details

Source: MITRE

Published: 2020-12-09

Updated: 2021-11-30

Type: CWE-416

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: 4.4

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

Impact Score: 3.6

Exploitability Score: 0.8

Severity: MEDIUM