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A vulnerability was discovered in the PyYAML library in versions before 5.3.1, 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. An attacker could use this flaw to execute arbitrary code on the system by abusing the python/object/new constructor.
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.
In PyYAML before 5.1, the yaml.load() API could execute arbitrary code if used with untrusted data. The load() function has been deprecated in version 5.1 and the 'UnsafeLoader' has been introduced for backward compatibility with the function.
Vulnerable Library - PyYAML-3.13.tar.gz
YAML parser and emitter for Python
Library home page: https://files.pythonhosted.org/packages/9e/a3/1d13970c3f36777c583f136c136f804d70f500168edc1edea6daa7200769/PyYAML-3.13.tar.gz
Path to dependency file: /requirements.txt
Path to vulnerable library: /requirements.txt
Found in HEAD commit: 4e9b73402ae50afb3e06e2b6415b13c2f6491f8b
Vulnerabilities
**In some cases, Remediation PR cannot be created automatically for a vulnerability despite the availability of remediation
Details
CVE-2020-1747
Vulnerable Library - PyYAML-3.13.tar.gz
YAML parser and emitter for Python
Library home page: https://files.pythonhosted.org/packages/9e/a3/1d13970c3f36777c583f136c136f804d70f500168edc1edea6daa7200769/PyYAML-3.13.tar.gz
Path to dependency file: /requirements.txt
Path to vulnerable library: /requirements.txt
Dependency Hierarchy:
Found in HEAD commit: 4e9b73402ae50afb3e06e2b6415b13c2f6491f8b
Found in base branch: master
Vulnerability Details
A vulnerability was discovered in the PyYAML library in versions before 5.3.1, 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. An attacker could use this flaw to execute arbitrary code on the system by abusing the python/object/new constructor.
Publish Date: 2020-03-24
URL: CVE-2020-1747
CVSS 3 Score Details (9.8)
Base Score Metrics:
Suggested Fix
Type: Upgrade version
Origin: GHSA-6757-jp84-gxfx
Release Date: 2020-03-24
Fix Resolution: pyyaml - 5.3.1
⛑️ Automatic Remediation will be attempted for this issue.
CVE-2020-14343
Vulnerable Library - PyYAML-3.13.tar.gz
YAML parser and emitter for Python
Library home page: https://files.pythonhosted.org/packages/9e/a3/1d13970c3f36777c583f136c136f804d70f500168edc1edea6daa7200769/PyYAML-3.13.tar.gz
Path to dependency file: /requirements.txt
Path to vulnerable library: /requirements.txt
Dependency Hierarchy:
Found in HEAD commit: 4e9b73402ae50afb3e06e2b6415b13c2f6491f8b
Found in base branch: master
Vulnerability Details
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.
Publish Date: 2021-02-09
URL: CVE-2020-14343
CVSS 3 Score Details (9.8)
Base Score Metrics:
Suggested Fix
Type: Upgrade version
Origin: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14343
Release Date: 2021-02-09
Fix Resolution: PyYAML - 5.4
⛑️ Automatic Remediation will be attempted for this issue.
CVE-2017-18342
Vulnerable Library - PyYAML-3.13.tar.gz
YAML parser and emitter for Python
Library home page: https://files.pythonhosted.org/packages/9e/a3/1d13970c3f36777c583f136c136f804d70f500168edc1edea6daa7200769/PyYAML-3.13.tar.gz
Path to dependency file: /requirements.txt
Path to vulnerable library: /requirements.txt
Dependency Hierarchy:
Found in HEAD commit: 4e9b73402ae50afb3e06e2b6415b13c2f6491f8b
Found in base branch: master
Vulnerability Details
In PyYAML before 5.1, the yaml.load() API could execute arbitrary code if used with untrusted data. The load() function has been deprecated in version 5.1 and the 'UnsafeLoader' has been introduced for backward compatibility with the function.
Publish Date: 2018-06-27
URL: CVE-2017-18342
CVSS 3 Score Details (9.8)
Base Score Metrics:
Suggested Fix
Type: Upgrade version
Origin: https://nvd.nist.gov/vuln/detail/CVE-2017-18342
Release Date: 2018-06-27
Fix Resolution: 5.1
⛑️ Automatic Remediation will be attempted for this issue.
⛑️Automatic Remediation will be attempted for this issue.
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