CVE-2020-8428 Information

Description

fs/namei.c in the Linux kernel before 5.5 has a may_create_in_sticky use-after-free which allows local users to cause a denial of service (OOPS) or possibly obtain sensitive information from kernel memory aka CID-d0cb50185ae9. One attack vector may be an open system call for a UNIX domain socket if the socket is being moved to a new parent directory and its old parent directory is being removed.

CVSS Vector

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

Reference

http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.html http://packetstormsecurity.com/files/157233/Kernel-Live-Patch-Security-Notice-LSN-0065-1.html http://www.openwall.com/lists/oss-security/2020/01/28/4 http://www.openwall.com/lists/oss-security/2020/02/02/1 https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d0cb50185ae942b03c4327be322055d622dc79f6 https://github.com/torvalds/linux/commit/d0cb50185ae942b03c4327be322055d622dc79f6 https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html https://security.netapp.com/advisory/ntap-20200313-0003/ https://usn.ubuntu.com/4318-1/ https://usn.ubuntu.com/4319-1/ https://usn.ubuntu.com/4320-1/ https://usn.ubuntu.com/4324-1/ https://usn.ubuntu.com/4325-1/ https://www.debian.org/security/2020/dsa-4667 https://www.debian.org/security/2020/dsa-4698 https://www.openwall.com/lists/oss-security/2020/01/28/2

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.1