CVE-2023-32690CWE-20

Responder can Invoke Undefined Behavior in libspdm Requester

Medium · published June 1, 2023

CVSS v3.1
5.7
EPSS
1%
Percentile
53.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.7 · MEDIUM
Vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00713 · 53.1th percentile
Weakness
CWE-20 · Improper Input Validation
Published
2023-06-01T16:15Z
EPSS history
Timeline
  • 01 JUN 16:15Z
    Responder can Invoke Undefined Behavior in libspdm Requester
    cvelistv5