SB2020050902 - Multiple vulnerabilities in Linux kernel

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2020050902

SB2020050902 - Multiple vulnerabilities in Linux kernel

Published: May 9, 2020 Updated: May 21, 2020

Security Bulletin ID SB2020050902
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) Input validation error (CVE-ID: CVE-2020-12771)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a deadlock if a coalescing operation fails in "btree_gc_coalesce" in "drivers/md/bcache/btree.c" file. A local user can pass specially crafted input to the application and perform a denial of service (DoS) attack.


2) Input validation error (CVE-ID: CVE-2020-12770)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to execute arbitrary code on the system.

The vulnerability exists due to the "sg_write" lacks an "sg_remove_request" call in a certain failure case. A local user can pass specially crafted input to the application and execute arbitrary code on the target system.


Remediation

Install update from vendor's website.

References