SB2020111120 - Multiple vulnerabilities in accountsservice (Ubuntu package)

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Main Vulnerability Database SB2020111120

SB2020111120 - Multiple vulnerabilities in accountsservice (Ubuntu package)

Published: November 11, 2020

Security Bulletin ID SB2020111120
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) Infinite loop (CVE-ID: CVE-2020-16127)

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

CVSSv4: 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/E:P/U:Clear


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

The vulnerability exists due to infinite loop in the "is_in_pam_environment" function. A local user can trigger an infinite loop by creating a symlink to "/dev/zero" and cause denial of service conditions.


2) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2020-16126)

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

CVSSv4: 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/E:P/U:Clear


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

The vulnerability exists due to the affected software improperly drops the RUID. A local user can send signals to accountsservice and perform a denial of service (DoS) attack.


Remediation

Install update from vendor's website.

References