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CVE-2022-35929— False positive signature verification in cosign

Quick assessment

Affected
sigstore cosign
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.

cosign是美国的一个 OCI 注册表中的容器签名、验证和存储。 cosign 1.10.1之前版本存在数据伪造问题漏洞，该漏洞源于如果存在任何证明，cosign verify-attestation --type可能报告误报。

CVSS 7.1 · High EPSS 0.66% · P51
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I. Basic Information for CVE-2022-35929

Vulnerability Information
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Vulnerability Title
False positive signature verification in cosign
Source: CVE Program / CVE List V5
Vulnerability Description
cosign is a container signing and verification utility. In versions prior to 1.10.1 cosign can report a false positive if any attestation exists. `cosign verify-attestation` used with the `--type` flag will report a false positive verification 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"). This can happen when signing with a standard keypair and with "keyless" signing with Fulcio. This vulnerability can be reproduced with the `distroless.dev/static@sha256:dd7614b5a12bc4d617b223c588b4e0c833402b8f4991fb5702ea83afad1986e2` image. This image has a `vuln` attestation but not an `spdx` attestation. However, if you run `cosign verify-attestation --type=spdx` on this image, it incorrectly succeeds. This issue has been addressed in version 1.10.1 of cosign. Users are advised to upgrade. There are no known workarounds for this issue.
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
cosign 数据伪造问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
cosign是美国的一个 OCI 注册表中的容器签名、验证和存储。 cosign 1.10.1之前版本存在数据伪造问题漏洞，该漏洞源于如果存在任何证明，cosign verify-attestation --type可能报告误报。
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 cosign < 1.10.1 -

II. Public POCs for CVE-2022-35929

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III. Intelligence Information for CVE-2022-35929

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Patches & Fixes for CVE-2022-35929 (1)

Vendor Advisories for CVE-2022-35929 (1)

IV. Related Vulnerabilities

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

V. Comments for CVE-2022-35929

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