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CVE-2021-24031

Quick assessment

Affected
Facebook Zstandard
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Facebook Zstandard是美国Facebook公司的一种开源的无损数据压缩算法。 Zstandard command-line utility prior to v1.4.1 存在安全漏洞，该漏洞源于输出文件可以被非预期方读取或写入。

AI Predicted 6.5 Difficulty: Moderate EPSS 0.46% · P39

Possible ATT&CK Techniques 1 AI

T1222.002 · Linux and Mac Permissions
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I. Basic Information for CVE-2021-24031

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
In the Zstandard command-line utility prior to v1.4.1, output files were created with default permissions. Correct file permissions (matching the input) would only be set at completion time. Output files could therefore be readable or writable to unintended parties.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
不安全的继承权限
Source: CVE Program / CVE List V5
Vulnerability Title
Zstandard 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Facebook Zstandard是美国Facebook公司的一种开源的无损数据压缩算法。 Zstandard command-line utility prior to v1.4.1 存在安全漏洞，该漏洞源于输出文件可以被非预期方读取或写入。
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
Facebook Zstandard 1.4.1 ~ unspecified -

II. Public POCs for CVE-2021-24031

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III. Intelligence Information for CVE-2021-24031

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Vendor Advisories for CVE-2021-24031 (1)

Other References for CVE-2021-24031 (2)

IV. Related Vulnerabilities

Same product: Zstandard
Same vendor: Facebook
Same weakness: CWE-277

V. Comments for CVE-2021-24031

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