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CVE-2023-2976— Use of temporary directory for file creation in `FileBackedOutputStream` in Guava

Quick assessment

Affected
Google Guava
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.

Google Guava是美国谷歌（Google）公司的一款包括图形库、函数类型、I/O和字符串处理等的Java核心库。 Google Guava 1.0 到 31.1版本存在安全漏洞，该漏洞源于允许机器上有权访问默认 Java 临时目录的用户和应用程序能够 在 FileBackedOutputStream中创建文件。

CVSS 5.5 · Medium EPSS 0.25% · P15

Possible ATT&CK Techniques 1 AI

T1552.004 · Private Keys
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I. Basic Information for CVE-2023-2976

Vulnerability Information
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Vulnerability Title
Use of temporary directory for file creation in `FileBackedOutputStream` in Guava
Source: CVE Program / CVE List V5
Vulnerability Description
Use of Java's default temporary directory for file creation in `FileBackedOutputStream` in Google Guava versions 1.0 to 31.1 on Unix systems and Android Ice Cream Sandwich allows other users and apps on the machine with access to the default Java temporary directory to be able to access the files created by the class. Even though the security vulnerability is fixed in version 32.0.0, we recommend using version 32.0.1 as version 32.0.0 breaks some functionality under Windows.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Google Guava 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Google Guava是美国谷歌（Google）公司的一款包括图形库、函数类型、I/O和字符串处理等的Java核心库。 Google Guava 1.0 到 31.1版本存在安全漏洞，该漏洞源于允许机器上有权访问默认 Java 临时目录的用户和应用程序能够 在 FileBackedOutputStream中创建文件。
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
Google Guava 1.0 ~ 32.0.0 -

II. Public POCs for CVE-2023-2976

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III. Intelligence Information for CVE-2023-2976

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Vendor Advisories for CVE-2023-2976 (1)

Other References for CVE-2023-2976 (2)

IV. Related Vulnerabilities

Same product: Guava
Same vendor: Google

V. Comments for CVE-2023-2976

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