Improper input validation in Dmtf Libspdm
CVE-2023-32690
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.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.007 (51.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.7 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
Affected products
- Dmtf Libspdm — versions < 2.3.3
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Patch, x_refsource_MISC)
Frequently asked questions
- What is CVE-2023-32690?
- CVE-2023-32690 is a medium-severity vulnerability in Dmtf Libspdm, classified under Improper Input Validation. CVSS score: 5.7/10. Published 2023-06-01.
- How severe is CVE-2023-32690?
- Medium severity. CVSS v3 base score is 5.7 out of 10.