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CVE

CVE-2025-66564

Sigstore Timestamp Authority allocates excessive memory during request parsing
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CVE

CVE-2025-66564

Sigstore Timestamp Authority allocates excessive memory during request parsing

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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
7.5
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
C
H
U
-

Related Resources

No items found.

References

https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/66xxx/CVE-2025-66564.json, https://github.com/sigstore/timestamp-authority/commit/0cae34e197d685a14904e0bad135b89d13b69421, https://github.com/sigstore/timestamp-authority/security/advisories/GHSA-4qg8-fj49-pxjh, https://nvd.nist.gov/vuln/detail/CVE-2025-66564

Severity

7.5

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
7.5
EPSS Probability
0.00018%
EPSS Percentile
0.03825%
Introduced Version
0
Fix Available
22406c3ff80d3543d2f2819e4f3cf944b5fe306c,0:1.10.0-1.amzn2.0.6,0:1.10.0-1.amzn2023.0.6

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