N/A - USN-4315-1

Executive Summary

Summary
Title	Apport vulnerabilities

Informations
Name	USN-4315-1	First vendor Publication	2020-04-02
Vendor	Ubuntu	Last vendor Modification	2020-04-02
Severity (Vendor)	N/A	Revision	N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score	NA
Base Score	NA	Environmental Score	NA
impact SubScore	NA	Temporal Score	NA
Exploitabality Sub Score	NA

Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score	N/A	Attack Range	N/A
Cvss Impact Score	N/A	Attack Complexity	N/A
Cvss Expoit Score	N/A	Authentication	N/A
Calculate full CVSS 2.0 Vectors scores

Detail

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

- Ubuntu 19.10 - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in Apport.

Software Description: - apport: automatically generate crash reports for debugging

Details:

Maximilien Bourgeteau discovered that the Apport lock file was created with insecure permissions. This could allow a local attacker to escalate their privileges via a symlink attack. (CVE-2020-8831)

Maximilien Bourgeteau discovered a race condition in Apport when setting crash report permissions. This could allow a local attacker to read arbitrary files via a symlink attack. (CVE-2020-8833)

Update instructions:

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

Ubuntu 19.10:
apport 2.20.11-0ubuntu8.8
python-apport 2.20.11-0ubuntu8.8
python3-apport 2.20.11-0ubuntu8.8

Ubuntu 18.04 LTS:
apport 2.20.9-0ubuntu7.14
python-apport 2.20.9-0ubuntu7.14
python3-apport 2.20.9-0ubuntu7.14

Ubuntu 16.04 LTS:
apport 2.20.1-0ubuntu2.23
python-apport 2.20.1-0ubuntu2.23
python3-apport 2.20.1-0ubuntu2.23

In general, a standard system update will make all the necessary changes.

References:
https://usn.ubuntu.com/4315-1
CVE-2020-8831, CVE-2020-8833

Package Information:
https://launchpad.net/ubuntu/+source/apport/2.20.11-0ubuntu8.8
https://launchpad.net/ubuntu/+source/apport/2.20.9-0ubuntu7.14
https://launchpad.net/ubuntu/+source/apport/2.20.1-0ubuntu2.23