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MitreCVE-2021-27213

HistoryFeb 14, 2021 - 4:15 a.m.

CVE-2021-27213

2021-02-1404:15:12

CWE-502

mitre

web.nvd.nist.gov

cve-2021-27213

pystemon

code execution

yaml deserialization

nvd

CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

AI Score

9.7

Confidence

High

EPSS

0.008

Percentile

82.2%

JSON

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

Affected configurations

Nvd

Node

pystemon_projectpystemonRange<2021-02-13

VendorProductVersionCPE
pystemon_projectpystemon*cpe:2.3:a:pystemon_project:pystemon:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
pystemon_project	pystemon	*	cpe:2.3:a:pystemon_project:pystemon::::::::

References

github.com/cvandeplas/pystemon/commit/dbeb87afefdb63de2f4cff69b6f10c5965d14b54

www.huntr.dev/bounties/1-other-pystemon/

Social References

CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

AI Score

9.7

Confidence

High

EPSS

0.008

Percentile

82.2%

JSON

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