CVE-2020-8428

 

Published at: - 29-01-2020 01:15

Last modified: - 26-10-2022 01:44

Total changes: - 2

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.

Common Vulnerability Scoring System (CVSS)

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

 

Verification logic

 

Reference

• https://github.com/torvalds/linux/commit/d0cb50185ae942b03c4327be322055d622dc79f6
• https://www.openwall.com/lists/oss-security/2020/01/28/2
• https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d0cb50185ae942b03c4327be322055d622dc79f6
• [oss-security] 20200129 Re: Linux kernel: user-triggerable read-after-free crash or 1-bit infoleak oracle in open(2)-Mailing List, Third Party Advisory
• [oss-security] 20200202 Re: Linux kernel: user-triggerable read-after-free crash or 1-bit infoleak oracle in open(2)-
• https://security.netapp.com/advisory/ntap-20200313-0003/
• openSUSE-SU-2020:0336-
• USN-4320-1-
• USN-4318-1-
• http://packetstormsecurity.com/files/157233/Kernel-Live-Patch-Security-Notice-LSN-0065-1.html
• USN-4324-1-
• USN-4325-1-
• USN-4319-1-
• DSA-4667-
• [debian-lts-announce] 20200610 [SECURITY] [DLA 2242-1] linux-4.9 security update-
• DSA-4698-

 

Keywords

NVD

 

CVE-2020-8428

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures