CVE-2020-16127
Published: 3 November 2020
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.
Notes
Author | Note |
---|---|
mdeslaur | This vulnerability is in an Ubuntu-specific patch and doesn't affect the upstream code. |
Priority
Status
Package | Release | Status |
---|---|---|
accountsservice Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(code not present)
|
focal |
Released
(0.6.55-0ubuntu12~20.04.4)
|
|
groovy |
Released
(0.6.55-0ubuntu13.2)
|
|
trusty |
Not vulnerable
(code not present)
|
|
upstream |
Needs triage
|
|
xenial |
Not vulnerable
(code not present)
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 5.5 |
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 |