Executive Summary

Summary
Title Apport vulnerabilities
Informations
Name USN-4171-1 First vendor Publication 2019-10-30
Vendor Ubuntu Last vendor Modification 2019-10-30
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:H/I:H/A:H
Overall CVSS Score 7.8
Base Score 7.8 Environmental Score 7.8
impact SubScore 5.9 Temporal Score 7.8
Exploitabality Sub Score 1.8
 
Attack Vector Local Attack Complexity Low
Privileges Required Low User Interaction None
Scope Unchanged Confidentiality Impact High
Integrity Impact High Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:L/Au:N/C:C/I:P/A:P)
Cvss Base Score 6.1 Attack Range Local
Cvss Impact Score 8.5 Attack Complexity Low
Cvss Expoit Score 3.9 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

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

- Ubuntu 19.10 - Ubuntu 19.04 - 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:

Kevin Backhouse discovered Apport would read its user-controlled settings file as the root user. This could be used by a local attacker to possibly crash Apport or have other unspecified consequences. (CVE-2019-11481)

Sander Bos discovered a race-condition in Apport during core dump creation. This could be used by a local attacker to generate a crash report for a privileged process that is readable by an unprivileged user. (CVE-2019-11482)

Sander Bos discovered Apport mishandled crash dumps originating from containers. This could be used by a local attacker to generate a crash report for a privileged process that is readable by an unprivileged user. (CVE-2019-11483)

Sander Bos discovered Apport mishandled lock-file creation. This could be used by a local attacker to cause a denial of service against Apport. (CVE-2019-11485)

Kevin Backhouse discovered Apport read various process-specific files with elevated privileges during crash dump generation. This could could be used by a local attacker to generate a crash report for a privileged process that is readable by an unprivileged user. (CVE-2019-15790)

Update instructions:

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

Ubuntu 19.10:
apport 2.20.11-0ubuntu8.1
python-apport 2.20.11-0ubuntu8.1
python3-apport 2.20.11-0ubuntu8.1

Ubuntu 19.04:
apport 2.20.10-0ubuntu27.2
python-apport 2.20.10-0ubuntu27.2
python3-apport 2.20.10-0ubuntu27.2

Ubuntu 18.04 LTS:
apport 2.20.9-0ubuntu7.8
python-apport 2.20.9-0ubuntu7.8
python3-apport 2.20.9-0ubuntu7.8

Ubuntu 16.04 LTS:
apport 2.20.1-0ubuntu2.20
python-apport 2.20.1-0ubuntu2.20
python3-apport 2.20.1-0ubuntu2.20

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

References:
https://usn.ubuntu.com/4171-1
CVE-2019-11481, CVE-2019-11482, CVE-2019-11483, CVE-2019-11485,
CVE-2019-15790

Package Information:
https://launchpad.net/ubuntu/+source/apport/2.20.11-0ubuntu8.1
https://launchpad.net/ubuntu/+source/apport/2.20.10-0ubuntu27.2
https://launchpad.net/ubuntu/+source/apport/2.20.9-0ubuntu7.8
https://launchpad.net/ubuntu/+source/apport/2.20.1-0ubuntu2.20

Original Source

Url : http://www.ubuntu.com/usn/USN-4171-1

CWE : Common Weakness Enumeration

% Id Name
50 % CWE-269 Improper Privilege Management
25 % CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition
25 % CWE-59 Improper Link Resolution Before File Access ('Link Following')

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 1
Os 5

Alert History

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0
1
Date Informations
2020-05-23 13:03:46
  • Multiple Updates
2019-10-30 09:19:35
  • First insertion