How does CVE-2020-16126 affect Ubuntu?

CVE-2020-16126 affects certain versions of Ubuntu's AccountsService (before 0.6.55-0ubuntu13.2) by allowing untrusted users to stop AccountsService from handling D-Bus messages in a timely fashion.

What is the severity of CVE-2020-16126?

CVE-2020-16126 has a severity rating of low, with a severity score of 3.3.

How can I fix CVE-2020-16126?

To fix CVE-2020-16126, it is recommended to update your Ubuntu system to version 0.6.55-0ubuntu13.2 or later, which addresses the vulnerability.

Where can I find more information about CVE-2020-16126?

More information about CVE-2020-16126 can be found in the advisory published by the GitHub Security Lab: [link](https://securitylab.github.com/advisories/GHSL-2020-187-accountsservice-drop-privs-DOS).

Vulnerability/
CVE-2020-16126

low

3.3

CWE

269

11/11/2020

16/9/2024

CVE-2020-16126: accountsservice drops ruid, allows unprivileged users to send it signals

Q: What is CVE-2020-16126?

CVE-2020-16126 is an Ubuntu-specific modification to AccountsService that improperly dropped the ruid, allowing untrusted users to send signals to AccountService, causing a denial-of-service (DOS) vulnerability.

First published: Wed Nov 11 2020(Updated: )

An Ubuntu-specific modification to AccountsService in versions before 0.6.55-0ubuntu13.2, among other earlier versions, improperly dropped the ruid, allowing untrusted users to send signals to AccountService, thus stopping it from handling D-Bus messages in a timely fashion.

Credit: security@ubuntu.com

Affected Software	Affected Version	How to fix
Freedesktop Accountsservice	<0.6.55

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Reference Links

https://securitylab.github.com/advisories/GHSL-2020-187-accountsservice-drop-privs-DOS

Frequently Asked Questions

What is CVE-2020-16126?
CVE-2020-16126 is an Ubuntu-specific modification to AccountsService that improperly dropped the ruid, allowing untrusted users to send signals to AccountService, causing a denial-of-service (DOS) vulnerability.
How does CVE-2020-16126 affect Ubuntu?
CVE-2020-16126 affects certain versions of Ubuntu's AccountsService (before 0.6.55-0ubuntu13.2) by allowing untrusted users to stop AccountsService from handling D-Bus messages in a timely fashion.
What is the severity of CVE-2020-16126?
CVE-2020-16126 has a severity rating of low, with a severity score of 3.3.
How can I fix CVE-2020-16126?
To fix CVE-2020-16126, it is recommended to update your Ubuntu system to version 0.6.55-0ubuntu13.2 or later, which addresses the vulnerability.
Where can I find more information about CVE-2020-16126?
More information about CVE-2020-16126 can be found in the advisory published by the GitHub Security Lab: [link](https://securitylab.github.com/advisories/GHSL-2020-187-accountsservice-drop-privs-DOS).

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canonical/freedesktop accountsservice

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