CVE-2021-27213 : config.py in pystemon before 2021-02-13 allows code execution via YAML deseriali

config.py in pystemon before 2021-02-13 allows code execution via YAML deserialization because SafeLoader and safe_load are not used.

Published 2021-02-14 04:15:13

Updated 2021-02-18 02:14:58

Source MITRE

View at NVD, CVE.org

Products affected by CVE-2021-27213

Pystemon Project » Pystemon
Versions before (<) 2021-02-13
cpe:2.3:a:pystemon_project:pystemon:*:*:*:*:*:*:*:*
Matching versions

EPSS FAQ

0.84%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 82 %

Percentile, the proportion of vulnerabilities that are scored at or less

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
7.5	HIGH	AV:N/AC:L/Au:N/C:P/I:P/A:P	10.0	6.4	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: Partial
9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	3.9	5.9	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE-502 Deserialization of Untrusted Data

The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid.

Assigned by: nvd@nist.gov (Primary)

https://github.com/cvandeplas/pystemon/commit/dbeb87afefdb63de2f4cff69b6f10c5965d14b54

Fixed code execution bug using SafeLoader() · cvandeplas/pystemon@dbeb87a · GitHub
Patch;Third Party Advisory
https://www.huntr.dev/bounties/1-other-pystemon/

Arbitrary Code Execution in pystemon | huntr
Exploit;Third Party Advisory

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