What is CVE-2021-20253?

CVE-2021-20253 is a medium-severity vulnerability in Red Hat Ansible Tower, classified under Files or Directories Accessible to External Parties. CVSS score: 6.7/10. Published 2021-03-09.

How severe is CVE-2021-20253?

Medium severity. CVSS v3 base score is 6.7 out of 10.

Is CVE-2021-20253 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Red Hat Ansible Tower

CVE-2021-20253

A flaw was found in ansible-tower. The default installation is vulnerable to Job Isolation escape allowing an attacker to elevate the privilege from a low privileged user to the awx user from outside the isolated environment. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

EPSS: 0.004 (33.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H.

Affected products

Redhat Ansible_tower
N/a Ansible-tower — versions ansible-tower 3.8.2, ansible-tower 3.7.5, ansible-tower 3.6.7

Weakness classification (CWE)

CWE-552 — Files or Directories Accessible to External Parties

Public proof-of-concept exploits

References

secalert@redhat.com (x_refsource_MISC, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2021-20253?: CVE-2021-20253 is a medium-severity vulnerability in Red Hat Ansible Tower, classified under Files or Directories Accessible to External Parties. CVSS score: 6.7/10. Published 2021-03-09.
How severe is CVE-2021-20253?: Medium severity. CVSS v3 base score is 6.7 out of 10.
Is CVE-2021-20253 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.