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Ubuntu Security Notice USN-4980-1

Ubuntu Security Notice USN-4980-1
Posted Jun 3, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4980-1 - Kevin Backhouse discovered that polkit incorrectly handled errors in the polkit_system_bus_name_get_creds_sync function. A local attacker could possibly use this issue to escalate privileges.

tags | advisory, local
systems | linux, ubuntu
advisories | CVE-2021-3560
MD5 | 90a3ffe491849f5a84754e4a9c0f6641

Ubuntu Security Notice USN-4980-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-4980-1
June 03, 2021

policykit-1 vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 21.04
- Ubuntu 20.10
- Ubuntu 20.04 LTS

Summary:

The system could be made to run programs as an administrator.

Software Description:
- policykit-1: framework for managing administrative policies and privileges

Details:

Kevin Backhouse discovered that polkit incorrectly handled errors in the
polkit_system_bus_name_get_creds_sync function. A local attacker could
possibly use this issue to escalate privileges.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 21.04:
libpolkit-agent-1-0 0.105-30ubuntu0.1
libpolkit-gobject-1-0 0.105-30ubuntu0.1
policykit-1 0.105-30ubuntu0.1

Ubuntu 20.10:
libpolkit-agent-1-0 0.105-29ubuntu0.1
libpolkit-gobject-1-0 0.105-29ubuntu0.1
policykit-1 0.105-29ubuntu0.1

Ubuntu 20.04 LTS:
libpolkit-agent-1-0 0.105-26ubuntu1.1
libpolkit-gobject-1-0 0.105-26ubuntu1.1
policykit-1 0.105-26ubuntu1.1

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-4980-1
CVE-2021-3560

Package Information:
https://launchpad.net/ubuntu/+source/policykit-1/0.105-30ubuntu0.1
https://launchpad.net/ubuntu/+source/policykit-1/0.105-29ubuntu0.1
https://launchpad.net/ubuntu/+source/policykit-1/0.105-26ubuntu1.1
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