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CVE-2023-47122— Gitsign's Rekor public keys fetched from upstream API instead of local TUF client.

Quick assessment

Affected
sigstore gitsign
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.

Gitsign是Gitsign个人开发者的一个能够免密钥完成对Git提交进行签名的工具。 Gitsign 0.6.0版本至0.8.0之前版本存在安全漏洞，该漏洞源于Rekor公钥是通过Rekor API获取的，而不是通过本地TUF客户端获取，可能会被欺骗而信任不正确的签名。

CVSS 4.2 · Medium EPSS 0.37% · P29

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle
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I. Basic Information for CVE-2023-47122

Vulnerability Information
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Vulnerability Title
Gitsign's Rekor public keys fetched from upstream API instead of local TUF client.
Source: CVE Program / CVE List V5
Vulnerability Description
Gitsign is software for keyless Git signing using Sigstore. In versions of gitsign starting with 0.6.0 and prior to 0.8.0, Rekor public keys were fetched via the Rekor API, instead of through the local TUF client. If the upstream Rekor server happened to be compromised, gitsign clients could potentially be tricked into trusting incorrect signatures. There is no known compromise the default public good instance (`rekor.sigstore.dev`) - anyone using this instance is unaffected. This issue was fixed in v0.8.0. No known workarounds are available.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Gitsign 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Gitsign是Gitsign个人开发者的一个能够免密钥完成对Git提交进行签名的工具。 Gitsign 0.6.0版本至0.8.0之前版本存在安全漏洞，该漏洞源于Rekor公钥是通过Rekor API获取的，而不是通过本地TUF客户端获取，可能会被欺骗而信任不正确的签名。
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
sigstore gitsign >= 0.6.0, < 0.8.0 -

II. Public POCs for CVE-2023-47122

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III. Intelligence Information for CVE-2023-47122

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Patches & Fixes for CVE-2023-47122 (2)

Other References for CVE-2023-47122 (1)

IV. Related Vulnerabilities

Same product: gitsign
Same vendor: sigstore
Same weakness: CWE-347

V. Comments for CVE-2023-47122

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