Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2020-1733

Severity CVSS v4.0:
Pending analysis
Type:
CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Publication date:
11/03/2020
Last modified:
07/11/2023

Description

A race condition flaw was found in Ansible Engine 2.7.17 and prior, 2.8.9 and prior, 2.9.6 and prior when running a playbook with an unprivileged become user. When Ansible needs to run a module with become user, the temporary directory is created in /var/tmp. This directory is created with "umask 77 && mkdir -p "; this operation does not fail if the directory already exists and is owned by another user. An attacker could take advantage to gain control of the become user as the target directory can be retrieved by iterating '/proc//cmdline'.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:L CVSS v3.1 Severity and Metrics:

Base Score: 5.00 MEDIUM
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:L

Attack Vector (AV): Local
Attack Complexity (AC): High
Privileges Required (PR): Low
User Interaction (UI): Required
Scope (S): Changed
Confidentiality (C): Low
Integrity (I): Low
Availability (A): Low

Base Score 3.x
5.00
Severity 3.x
MEDIUM
Vector 2.0
AV:L/AC:H/Au:N/C:P/I:P/A:P CVSS v2.0 Severity and Metrics:

Base Score: 3.70 LOW
Vector: AV:L/AC:H/Au:N/C:P/I:P/A:P

Attack Vector (AV): Local
Attack Complexity (AC): High
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): Physical
Availability (A): Physical

Base Score 2.0
3.70
Severity 2.0
LOW

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:redhat:ansible:*:*:*:*:*:*:*:* 2.7.16 (including)
cpe:2.3:a:redhat:ansible:*:*:*:*:*:*:*:* 2.8.0 (including) 2.8.8 (excluding)
cpe:2.3:a:redhat:ansible:*:*:*:*:*:*:*:* 2.9.0 (including) 2.9.5 (including)
cpe:2.3:a:redhat:ansible_tower:*:*:*:*:*:*:*:* 3.3.4 (including)
cpe:2.3:a:redhat:ansible_tower:*:*:*:*:*:*:*:* 3.3.5 (including) 3.4.5 (including)
cpe:2.3:a:redhat:ansible_tower:*:*:*:*:*:*:*:* 3.5.0 (including) 3.5.5 (including)
cpe:2.3:a:redhat:ansible_tower:*:*:*:*:*:*:*:* 3.6.0 (including) 3.6.3 (including)
cpe:2.3:a:redhat:cloudforms_management_engine:5.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openstack:13:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools