CVE-2025-7844

wolfTPM library wrapper function `wolfTPM2_RsaKey_TpmToWolf` copies external data to a fixed-size stack buffer without length validation potentially causing stack-based buffer overflow

State
Published
Severity
1.0 Low
Published
Aug 4, 2025
Updated
Aug 5, 2025
Reserved
Jul 18, 2025

Read the record on cve.org

Description

Exporting a TPM based RSA key larger than 2048 bits from the TPM could overrun a stack buffer if the default `MAX_RSA_KEY_BITS=2048` is used. If your TPM 2.0 module supports RSA key sizes larger than 2048 bit and your applications supports creating or importing an RSA private or public key larger than 2048 bits and your application calls `wolfTPM2_RsaKey_TpmToWolf` on that key, then a stack buffer could be overrun. If the `MAX_RSA_KEY_BITS` build-time macro is set correctly (RSA bits match what TPM hardware is capable of) for the hardware target, then a stack overrun is not possible.

Scores

CVSSScoreVectorSource
4.01.0 LowCVSS:4.0/AV:P/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/U:GreenwolfSSL

Weaknesses

Affected Products

ProductVersions
wolfTPMwolfSSL Inc.
  • 3.9.2 and earlierAffected

References

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