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CVE-2022-35930— Ability to bypass attestation verification in sigstore PolicyController

Quick assessment

Affected
sigstore policy-controller
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.

sigstore Policy Controller是sigstore公司的一个工具。 Policy Controller 0.2.1之前版本存在数据伪造问题漏洞，该漏洞源于Policy Controller 存在报告误报，导致在不应该被录取的情况下被录取。

CVSS 7.1 · High EPSS 0.64% · P48
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I. Basic Information for CVE-2022-35930

Vulnerability Information
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Vulnerability Title
Ability to bypass attestation verification in sigstore PolicyController
Source: CVE Program / CVE List V5
Vulnerability Description
PolicyController is a utility used to enforce supply chain policy in Kubernetes clusters. In versions prior to 0.2.1 PolicyController will report a false positive, resulting in an admission when it should not be admitted when there is at least one attestation with a valid signature and there are NO attestations of the type being verified (--type defaults to "custom"). An example image that can be used to test this is `ghcr.io/distroless/static@sha256:dd7614b5a12bc4d617b223c588b4e0c833402b8f4991fb5702ea83afad1986e2`. Users should upgrade to version 0.2.1 to resolve this issue. There are no workarounds for users unable to upgrade.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
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
sigstore Policy Controller 数据伪造问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
sigstore Policy Controller是sigstore公司的一个工具。 Policy Controller 0.2.1之前版本存在数据伪造问题漏洞，该漏洞源于Policy Controller 存在报告误报，导致在不应该被录取的情况下被录取。
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 policy-controller < 0.2.1 -

II. Public POCs for CVE-2022-35930

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III. Intelligence Information for CVE-2022-35930

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Patches & Fixes for CVE-2022-35930 (1)

Vendor Advisories for CVE-2022-35930 (1)

Other References for CVE-2022-35930 (1)

IV. Related Vulnerabilities

Same vendor: sigstore
Same weakness: CWE-347

V. Comments for CVE-2022-35930

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