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CVE-2020-1917

Quick assessment

Affected
Facebook HHVM
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.

Katy Voor HHVM是 （Katy Voor）开源的一个应用软件。提供一个开放源代码的虚拟机，旨在执行用Hack编写的程序。 HHVM 存在安全漏洞，该漏洞源于如果缓冲区已满，将导致写入越界。以下产品及版本受到影响：HHVM versions prior to 4.56.3, all versions between 4.57.0 and 4.80.1, all versions between 4.81.0 and 4.93.1, and versions 4.94.0, 4.95.0, 4.9

AI Predicted 7.5 Difficulty: Moderate EPSS 1.38% · P71

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2020-1917

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
xbuf_format_converter, used as part of exif_read_data, was appending a terminating null character to the generated string, but was not using its standard append char function. As a result, if the buffer was full, it would result in an out-of-bounds write. This issue affects HHVM versions prior to 4.56.3, all versions between 4.57.0 and 4.80.1, all versions between 4.81.0 and 4.93.1, and versions 4.94.0, 4.95.0, 4.96.0, 4.97.0, 4.98.0.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Katy Voor HHVM 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Katy Voor HHVM是 （Katy Voor）开源的一个应用软件。提供一个开放源代码的虚拟机，旨在执行用Hack编写的程序。 HHVM 存在安全漏洞，该漏洞源于如果缓冲区已满，将导致写入越界。以下产品及版本受到影响：HHVM versions prior to 4.56.3, all versions between 4.57.0 and 4.80.1, all versions between 4.81.0 and 4.93.1, and versions 4.94.0, 4.95.0, 4.9
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 HHVM 4.98.1 ~ unspecified -

II. Public POCs for CVE-2020-1917

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III. Intelligence Information for CVE-2020-1917

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Patches & Fixes for CVE-2020-1917 (1)

Security Blog Posts for CVE-2020-1917 (1)

Same Patch Batch · Facebook · 2021-03-10 · 7 CVEs total

CVE-2020-1916 Katy Voor HHVM 缓冲区错误漏洞
CVE-2020-1918 Katy Voor HHVM 缓冲区错误漏洞
CVE-2020-1919 Katy Voor HHVM 缓冲区错误漏洞
CVE-2020-1921 Katy Voor HHVM 缓冲区错误漏洞
CVE-2021-24025 Katy Voor HHVM 输入验证错误漏洞
CVE-2021-24030 Facebook Gameroom 参数注入漏洞

IV. Related Vulnerabilities

Same product: HHVM
Same vendor: Facebook
Same weakness: CWE-122

V. Comments for CVE-2020-1917

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