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cve[email protected]CVE-2020-14343
HistoryFeb 09, 2021 - 9:15 p.m.

CVE-2020-14343

2021-02-0921:15:12
CWE-20
web.nvd.nist.gov
318
6
cve-2020-14343
pyyaml library
vulnerability
arbitrary code execution
yaml files
nvd

9.8 High

CVSS3

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

8 High

AI Score

Confidence

Low

10 High

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

0.006 Low

EPSS

Percentile

77.9%

A vulnerability was discovered in the PyYAML library in versions before 5.4, where it is susceptible to arbitrary code execution when it processes untrusted YAML files through the full_load method or with the FullLoader loader. Applications that use the library to process untrusted input may be vulnerable to this flaw. This flaw allows an attacker to execute arbitrary code on the system by abusing the python/object/new constructor. This flaw is due to an incomplete fix for CVE-2020-1747.

Affected configurations

Vulners
NVD
Node
pyyamlpyyamlRange5.4
VendorProductVersionCPE
pyyamlpyyaml*cpe:2.3:a:pyyaml:pyyaml:*:*:*:*:*:*:*:*

CNA Affected

[
  {
    "vendor": "n/a",
    "product": "PyYAML",
    "versions": [
      {
        "version": "PyYAML 5.4",
        "status": "affected"
      }
    ]
  }
]

Social References

More

9.8 High

CVSS3

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

8 High

AI Score

Confidence

Low

10 High

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

0.006 Low

EPSS

Percentile

77.9%