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Ubuntu 21.04 USN-4980-1: PolicyKit Privilege Escalation Vulnerability

ubuntu
Calendar Grey June 3, 2021
Dist Ubuntu Esm H88
The Ubuntu Security Notice USN-4981-1 addresses a critical vulnerability in the OpenSSH protocol that could allow unauthorized access to secure shell sessions.
The system could be made to run programs as an administrator.

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.

Topics%20covered

Topics Covered

security advisory Ubuntu risk escalation policykit privilege administrative

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

Severity
important
Lowest
Low
Medium
High
Critical

June 03, 2021

Topics%20covered

Topics Covered

security advisory Ubuntu risk escalation policykit privilege administrative

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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