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I. Basic Information for CVE-2025-52556
Vulnerability Information

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Vulnerability Title
rfc3161-client has insufficient verification for timestamp response signatures
Source: NVD (National Vulnerability Database)
Vulnerability Description
rfc3161-client is a Python library implementing the Time-Stamp Protocol (TSP) described in RFC 3161. Prior to version 1.0.3, there is a flaw in the timestamp response signature verification logic. In particular, chain verification is performed against the TSR's embedded certificates up to the trusted root(s), but fails to verify the TSR's own signature against the timestamping leaf certificates. Consequently, vulnerable versions perform insufficient signature validation to properly consider a TSR verified, as the attacker can introduce any TSR signature so long as the embedded leaf chains up to some root TSA. This issue has been patched in version 1.0.3. There is no workaround for this issue.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
密码学签名的验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
rfc3161-client 数据伪造问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
rfc3161-client是Trail of Bits开源的一个软件。 rfc3161-client 1.0.3之前版本存在数据伪造问题漏洞,该漏洞源于时间戳响应签名验证逻辑缺陷,可能导致签名验证不足。
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
VendorProductAffected VersionsCPESubscribe
trailofbitsrfc3161-client < 1.0.3 -
II. Public POCs for CVE-2025-52556
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III. Intelligence Information for CVE-2025-52556
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IV. Related Vulnerabilities
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