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CVE-2023-32690— Responder can Invoke Undefined Behavior in libspdm Requester

Quick assessment

Affected
DMTF libspdm
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.

libspdm是DMTF开源的一个遵循 DMTF SPDM 规范的示例实现。 libspdm 2.3.3之前版本和3.0版本存在安全漏洞，该漏洞源于允许未经验证的请求者存储并使用响应者的CTExponent值。

CVSS 5.7 · Medium EPSS 0.71% · P54

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2023-32690

Vulnerability Information
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Vulnerability Title
Responder can Invoke Undefined Behavior in libspdm Requester
Source: CVE Program / CVE List V5
Vulnerability Description
libspdm is a sample implementation that follows the DMTF SPDM specifications. Prior to versions 2.3.3 and 3.0, following a successful CAPABILITIES response, a libspdm Requester stores the Responder's CTExponent into its context without validation. If the Requester sends a request message that requires a cryptography operation by the Responder, such as CHALLENGE, libspdm will calculate the timeout value using the Responder's unvalidated CTExponent. A patch is available in version 2.3.3. A workaround is also available. After completion of VCA, the Requester can check the value of the Responder's CTExponent. If it greater than or equal to 64, then the Requester can stop communication with the Responder.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
libspdm 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
libspdm是DMTF开源的一个遵循 DMTF SPDM 规范的示例实现。 libspdm 2.3.3之前版本和3.0版本存在安全漏洞，该漏洞源于允许未经验证的请求者存储并使用响应者的CTExponent值。
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
DMTF libspdm < 2.3.3 -

II. Public POCs for CVE-2023-32690

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III. Intelligence Information for CVE-2023-32690

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Patches & Fixes for CVE-2023-32690 (1)

Vendor Advisories for CVE-2023-32690 (1)

Other References for CVE-2023-32690 (1)

IV. Related Vulnerabilities

Same product: libspdm
Same vendor: DMTF
Same weakness: CWE-20