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CVE-2022-39253— Git subject to exposure of sensitive information via local clone of symbolic links

Quick assessment

Affected
git git
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.

Git是一套免费、开源的分布式版本控制系统。 Git存在安全漏洞，该漏洞源于Git错误地处理了某些符号链接。

CVSS 5.5 · Medium EPSS 1.30% · P70
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I. Basic Information for CVE-2022-39253

Vulnerability Information
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Vulnerability Title
Git subject to exposure of sensitive information via local clone of symbolic links
Source: CVE Program / CVE List V5
Vulnerability Description
Git is an open source, scalable, distributed revision control system. Versions prior to 2.30.6, 2.31.5, 2.32.4, 2.33.5, 2.34.5, 2.35.5, 2.36.3, and 2.37.4 are subject to exposure of sensitive information to a malicious actor. When performing a local clone (where the source and target of the clone are on the same volume), Git copies the contents of the source's `$GIT_DIR/objects` directory into the destination by either creating hardlinks to the source contents, or copying them (if hardlinks are disabled via `--no-hardlinks`). A malicious actor could convince a victim to clone a repository with a symbolic link pointing at sensitive information on the victim's machine. This can be done either by having the victim clone a malicious repository on the same machine, or having them clone a malicious repository embedded as a bare repository via a submodule from any source, provided they clone with the `--recurse-submodules` option. Git does not create symbolic links in the `$GIT_DIR/objects` directory. The problem has been patched in the versions published on 2022-10-18, and backported to v2.30.x. Potential workarounds: Avoid cloning untrusted repositories using the `--local` optimization when on a shared machine, either by passing the `--no-local` option to `git clone` or cloning from a URL that uses the `file://` scheme. Alternatively, avoid cloning repositories from untrusted sources with `--recurse-submodules` or run `git config --global protocol.file.allow user`.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Git 后置链接漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Git是一套免费、开源的分布式版本控制系统。 Git存在安全漏洞，该漏洞源于Git错误地处理了某些符号链接。
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
git git < 2.30.6 -

II. Public POCs for CVE-2022-39253

# POC Description Source Link Shenlong Link
1 None https://github.com/ssst0n3/docker-cve-2022-39253-poc POC Details
2 https://nvd.nist.gov/vuln/detail/CVE-2022-39253 https://github.com/HiImDarwin/NetworkSecurityFinalProject POC Details
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III. Intelligence Information for CVE-2022-39253

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Vendor Advisories for CVE-2022-39253 (3)

Mailing List Discussions for CVE-2022-39253 (9)

IV. Related Vulnerabilities

Same product: git
Same vendor: git
Same weakness: CWE-200

V. Comments for CVE-2022-39253

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