Apport is_same_ns host_pid resource management

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A vulnerability was found in Apport (version unknown). It has been classified as problematic. Affected is the function is_same_ns. The manipulation of the argument host_pid as part of a Variable leads to a resource management vulnerability. CWE is classifying the issue as CWE-399. This is going to have an impact on availability. CVE summarizes:

Apport does not properly handle crashes originating from a PID namespace allowing local users to create certain files as root which an attacker could leverage to perform a denial of service via resource exhaustion, possibly gain root privileges, or escape from containers. The is_same_ns() function returns True when /proc/<global pid>/ does not exist in order to indicate that the crash should be handled in the global namespace rather than inside of a container. However, the portion of the data/apport code that decides whether or not to forward a crash to a container does not always replace sys.argv[1] with the value stored in the host_pid variable when /proc/<global pid>/ does not exist which results in the container pid being used in the global namespace. This flaw affects versions 2.20.8-0ubuntu4 through 2.20.9-0ubuntu7, 2.20.7-0ubuntu3.7, 2.20.7-0ubuntu3.8, and 2.20.1-0ubuntu2.15 through 2.20.1-0ubuntu2.17.

The bug was discovered 05/30/2018. The weakness was disclosed 05/31/2018 (Website). The advisory is available at usn.ubuntu.com. This vulnerability is traded as CVE-2018-6552 since 02/02/2018. The exploitability is told to be easy. Local access is required to approach this attack. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 110263 (Ubuntu 16.04 LTS / 17.10 / 18.04 LTS : apport vulnerability (USN-3664-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 197152 (Ubuntu Security Notification for Apport Vulnerability (USN-3664-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (110263).

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CPE 2.3info

CPE 2.2info

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CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.5

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
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VulDB Reliability: 🔍

NVD Base Score: 7.8
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Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

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Nessus ID: 110263
Nessus Name: Ubuntu 16.04 LTS / 17.10 / 18.04 LTS : apport vulnerability (USN-3664-1)
Nessus File: 🔍
Nessus Risk: 🔍
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Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

02/02/2018 🔍
05/30/2018 +117 days 🔍
05/30/2018 +0 days 🔍
05/31/2018 +0 days 🔍
05/31/2018 +0 days 🔍
05/31/2018 +0 days 🔍
06/01/2018 +1 days 🔍
03/19/2023 +1752 days 🔍

Sourcesinfo

Advisory: USN-3664-1
Status: Not defined

CVE: CVE-2018-6552 (🔍)

Entryinfo

Created: 06/01/2018 09:23
Updated: 03/19/2023 08:27
Changes: 06/01/2018 09:23 (67), 02/10/2020 17:18 (3), 03/19/2023 08:27 (4)
Complete: 🔍

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