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CVE-2020-16127

Publication date 3 November 2020

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

5.5 · Medium

Score breakdown

An Ubuntu-specific modification to AccountsService in versions before 0.6.55-0ubuntu13.2, among other earlier versions, would perform unbounded read operations on user-controlled ~/.pam_environment files, allowing an infinite loop if /dev/zero is symlinked to this location.

Read the notes from the security team

Status

Package Ubuntu Release Status
accountsservice 20.10 groovy
Fixed 0.6.55-0ubuntu13.2
20.04 LTS focal
Fixed 0.6.55-0ubuntu12~20.04.4
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty
Not affected

Notes

mdeslaur

This vulnerability is in an Ubuntu-specific patch and doesn't affect the upstream code.

Severity score breakdown

Parameter Value
Base score 5.5 · Medium
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

    • USN-4616-1
    • AccountsService vulnerabilities
    • 3 November 2020

Other references