sigstore-go, a Go library for Sigstore signing and verification, is susceptible to a denial of service attack in versions prior to 0.6.1 when a verifier is provided a maliciously crafted Sigstore Bundle containing large amounts of verifiable data, in the form of signed transparency log entries, RFC 3161 timestamps, and attestation subjects. The verification of these data structures is computationally expensive. This can be used to consume excessive CPU resources, leading to a denial of service attack. TUF's security model labels this type of vulnerability an "Endless data attack," and can lead to verification failing to complete and disrupting services that rely on sigstore-go for verification. This vulnerability is addressed with sigstore-go 0.6.1, which adds hard limits to the number of verifiable data structures that can be processed in a bundle. Verification will fail if a bundle has data that exceeds these limits. The limits are 32 signed transparency log entries, 32 RFC 3161 timestamps, 1024 attestation subjects, and 32 digests per attestation subject. These limits are intended to be high enough to accommodate the vast majority of use cases, while preventing the verification of maliciously crafted bundles that contain large amounts of verifiable data. Users who are vulnerable but unable to quickly upgrade may consider adding manual bundle validation to enforce limits similar to those in the referenced patch prior to calling sigstore-go's verification functions.
References
Configurations
History
24 Sep 2024, 16:50
Type | Values Removed | Values Added |
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References | () https://github.com/sigstore/sigstore-go/blob/725e508ed4933e6f5b5206e32af4bbe76f587b54/pkg/verify/signature.go#L183-L193 - Issue Tracking | |
References | () https://github.com/sigstore/sigstore-go/blob/725e508ed4933e6f5b5206e32af4bbe76f587b54/pkg/verify/tlog.go#L74-L178 - Issue Tracking | |
References | () https://github.com/sigstore/sigstore-go/blob/725e508ed4933e6f5b5206e32af4bbe76f587b54/pkg/verify/tsa.go#L59-L68 - Issue Tracking | |
References | () https://github.com/sigstore/sigstore-go/commit/01e70e89e58226286d7977b4dba43b6be472b12c - Patch | |
References | () https://github.com/sigstore/sigstore-go/security/advisories/GHSA-cq38-jh5f-37mq - Mitigation, Vendor Advisory | |
First Time |
Sigstore
Sigstore sigstore-go |
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CPE | cpe:2.3:a:sigstore:sigstore-go:*:*:*:*:*:*:*:* | |
CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.5 |
05 Sep 2024, 12:53
Type | Values Removed | Values Added |
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Summary |
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04 Sep 2024, 21:15
Type | Values Removed | Values Added |
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New CVE |
Information
Published : 2024-09-04 21:15
Updated : 2024-09-24 16:50
NVD link : CVE-2024-45395
Mitre link : CVE-2024-45395
CVE.ORG link : CVE-2024-45395
JSON object : View
Products Affected
sigstore
- sigstore-go
CWE
CWE-835
Loop with Unreachable Exit Condition ('Infinite Loop')