Vulnerability in Mitre Caldera
CVE-2021-42561
An issue was discovered in CALDERA 2.8.1. When activated, the Human plugin passes the unsanitized name parameter to a python "os.system" function. This allows attackers to use shell metacharacters (e.g., backticks "``" or dollar parenthesis "$()" ) in order to escape the current command and execute arbitrary shell commands.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.196 (97.3th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 97.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.196 · newest: 0.196 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/mitre/caldera/releases (Third Party Advisory, Release Notes)
- github.com/DrunkenShells/Disclosures/tree/master/CVE-2021-42561-Command Injecti… (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-42561?
- CVE-2021-42561 is a high-severity vulnerability in Mitre Caldera, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 8.8/10. Published 2022-01-12.
- How severe is CVE-2021-42561?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-42561 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.