CVE-2025-66564— Sigstore Timestamp Authority allocates excessive memory during request parsing
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I. Basic Information for CVE-2025-66564
Vulnerability Information
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Vulnerability Title
Sigstore Timestamp Authority allocates excessive memory during request parsing
Source: NVD (National Vulnerability Database)
Vulnerability Description
Sigstore Timestamp Authority is a service for issuing RFC 3161 timestamps. Prior to 2.0.3, Function api.ParseJSONRequest currently splits (via a call to strings.Split) an optionally-provided OID (which is untrusted data) on periods. Similarly, function api.getContentType splits the Content-Type header (which is also untrusted data) on an application string. As a result, in the face of a malicious request with either an excessively long OID in the payload containing many period characters or a malformed Content-Type header, a call to api.ParseJSONRequest or api.getContentType incurs allocations of O(n) bytes (where n stands for the length of the function's argument). This vulnerability is fixed in 2.0.3.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
不对称的资源消耗(放大攻击)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Sigstore Timestamp Authority 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Sigstore Timestamp Authority是sigstore开源的一个RFC3161时间戳授权软件。 Sigstore Timestamp Authority 2.0.3之前版本存在安全漏洞，该漏洞源于api.ParseJSONRequest和api.getContentType函数对非信任数据处理不当，可能导致内存过度分配。
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 | timestamp-authority | < 2.0.3 | - |
II. Public POCs for CVE-2025-66564
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|---|
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IV. Related Vulnerabilities
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V. Comments for CVE-2025-66564
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