Executive Summary

This Alert is flagged as TOP 25 Common Weakness Enumeration from CWE/SANS. For more information, you can read this.
Title Mesa vulnerability
Name USN-4271-1 First vendor Publication 2020-02-06
Vendor Ubuntu Last vendor Modification 2020-02-06
Severity (Vendor) N/A Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Overall CVSS Score 4.4
Base Score 4.4 Environmental Score 4.4
impact SubScore 2.5 Temporal Score 4.4
Exploitabality Sub Score 1.8
Attack Vector Local Attack Complexity Low
Privileges Required Low User Interaction None
Scope Unchanged Confidentiality Impact Low
Integrity Impact Low Availability Impact None
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:L/Au:N/C:P/I:P/A:N)
Cvss Base Score 3.6 Attack Range Local
Cvss Impact Score 4.9 Attack Complexity Low
Cvss Expoit Score 3.9 Authentication None Required
Calculate full CVSS 2.0 Vectors scores


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

- Ubuntu 19.10 - Ubuntu 18.04 LTS


Mesa could be made to expose sensitive information.

Software Description: - mesa: free implementation of the EGL API


Tim Brown discovered that Mesa incorrectly handled shared memory permissions. A local attacker could use this issue to obtain and possibly alter sensitive information belonging to another user.

Update instructions:

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

Ubuntu 19.10:
libd3dadapter9-mesa 19.2.8-0ubuntu0~19.10.2
libegl-mesa0 19.2.8-0ubuntu0~19.10.2
libegl1-mesa 19.2.8-0ubuntu0~19.10.2
libgbm1 19.2.8-0ubuntu0~19.10.2
libgl1-mesa-dri 19.2.8-0ubuntu0~19.10.2
libgl1-mesa-glx 19.2.8-0ubuntu0~19.10.2
libglapi-mesa 19.2.8-0ubuntu0~19.10.2
libgles2-mesa 19.2.8-0ubuntu0~19.10.2
libglx-mesa0 19.2.8-0ubuntu0~19.10.2
libosmesa6 19.2.8-0ubuntu0~19.10.2
libwayland-egl1-mesa 19.2.8-0ubuntu0~19.10.2
libxatracker2 19.2.8-0ubuntu0~19.10.2
mesa-opencl-icd 19.2.8-0ubuntu0~19.10.2
mesa-va-drivers 19.2.8-0ubuntu0~19.10.2
mesa-vdpau-drivers 19.2.8-0ubuntu0~19.10.2
mesa-vulkan-drivers 19.2.8-0ubuntu0~19.10.2

Ubuntu 18.04 LTS:
libd3dadapter9-mesa 19.2.8-0ubuntu0~18.04.2
libegl-mesa0 19.2.8-0ubuntu0~18.04.2
libegl1-mesa 19.2.8-0ubuntu0~18.04.2
libgbm1 19.2.8-0ubuntu0~18.04.2
libgl1-mesa-dri 19.2.8-0ubuntu0~18.04.2
libgl1-mesa-glx 19.2.8-0ubuntu0~18.04.2
libglapi-mesa 19.2.8-0ubuntu0~18.04.2
libgles2-mesa 19.2.8-0ubuntu0~18.04.2
libglx-mesa0 19.2.8-0ubuntu0~18.04.2
libosmesa6 19.2.8-0ubuntu0~18.04.2
libwayland-egl1-mesa 19.2.8-0ubuntu0~18.04.2
libxatracker2 19.2.8-0ubuntu0~18.04.2
mesa-opencl-icd 19.2.8-0ubuntu0~18.04.2
mesa-va-drivers 19.2.8-0ubuntu0~18.04.2
mesa-vdpau-drivers 19.2.8-0ubuntu0~18.04.2
mesa-vulkan-drivers 19.2.8-0ubuntu0~18.04.2

After a standard system update you need to restart your session to make all the necessary changes.


Package Information:

Original Source

Url : http://www.ubuntu.com/usn/USN-4271-1

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-732 Incorrect Permission Assignment for Critical Resource (CWE/SANS Top 25)

CPE : Common Platform Enumeration

Application 1

Alert History

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Date Informations
2020-05-23 13:03:46
  • Multiple Updates
2020-03-19 13:20:13
  • First insertion