RCE in Mitre Caldera
CVE-2021-42559
An issue was discovered in CALDERA 2.8.1. It contains multiple startup "requirements" that execute commands when starting the server. Because these commands can be changed via the REST API, an authenticated user can insert arbitrary commands that will execute when the server is restarted.
Vulnerability class: Command Injection (OS Command Injection)
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: 0.020 (79.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 79.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/mitre/caldera/releases (Release Notes)
- github.com/DrunkenShells/Disclosures/tree/master/CVE-2021-42559-Command Injecti… (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-42559?
- CVE-2021-42559 is a high-severity vulnerability in Mitre Caldera, classified under Command Injection. CVSS score: 8.8/10. Published 2022-01-12.
- How severe is CVE-2021-42559?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-42559 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.