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CVE-2020-14343

Quick assessment

Affected
n/a PyYAML
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

PyYAML是一款基于Python的YAML解析器和生成器。 PyYAML中存在输入验证错误漏洞，该漏洞源于网络系统或产品未对输入的数据进行正确的验证。

AI Predicted 9.8 Difficulty: Easy EPSS 5.98% · P93

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2020-14343

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
PyYAML 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
PyYAML是一款基于Python的YAML解析器和生成器。 PyYAML中存在输入验证错误漏洞，该漏洞源于网络系统或产品未对输入的数据进行正确的验证。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
- PyYAML PyYAML 5.4 -

II. Public POCs for CVE-2020-14343

# POC Description Source Link Shenlong Link
1 Experimenting with the CVE-2020-14343 PyYAML vulnerability https://github.com/raul23/pyyaml-CVE-2020-14343 POC Details
2 A web application vulnerable to CVE-2020-14343 insecure deserialization leading to command execution in PyYAML package. https://github.com/j4k0m/loader-CVE-2020-14343 POC Details
3 CVE-2020-14343的payload https://github.com/Kairo-one/CVE-2020-14343 POC Details
4 CVE-2020-14343的payload https://github.com/Kairo-one/CVE-2020-14343-PyYAML POC Details
5 None https://github.com/sijie52/yasa-cve-2020-14343 POC Details
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III. Intelligence Information for CVE-2020-14343

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Vendor Advisories for CVE-2020-14343 (3)

Other References for CVE-2020-14343 (2)

Same Patch Batch · n/a · 2021-02-09 · 46 CVEs total

CVE-2021-23327 6.3 MEDIUM Cross-site Scripting (XSS)
CVE-2021-26550 SmartFoxServer 安全漏洞
CVE-2020-35572 SOURCEFORGE Adminer 跨站脚本漏洞
CVE-2021-26953 Rust 信息泄露漏洞
CVE-2021-26957 Rust 缓冲区错误漏洞
CVE-2021-26955 Rust 安全漏洞
CVE-2021-26954 Rust 资源管理错误漏洞
CVE-2021-26952 Rust 信息泄露漏洞
CVE-2021-26951 Rust 缓冲区错误漏洞
CVE-2021-26958 Rust 安全漏洞
CVE-2021-26551 SmartFoxServer 代码注入漏洞
CVE-2020-22839 B2evolution Cms 跨站脚本漏洞
CVE-2021-26549 GotoAndPlay SNC SmartFoxServer 跨站脚本漏洞
CVE-2020-18215 PHPSHE SQL注入漏洞
CVE-2020-13117 Wavlink WN575A4 和 WN579X3 命令注入漏洞
CVE-2020-28645 OwnCloud 输入验证错误漏洞
CVE-2021-22267 Idelji Web ViewPoint Suite 安全漏洞
CVE-2020-28644 Owncloud ownCloud 跨站请求伪造漏洞
CVE-2021-3191 HPE Web ViewPoint Suite 授权问题漏洞
CVE-2019-17582 libzip 资源管理错误漏洞

Showing top 20 of 46 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: PyYAML
Same vendor: n/a
Same weakness: CWE-20

V. Comments for CVE-2020-14343

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