CVEvulnerability
CVE-2021-32489
4.4 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2021-05-10
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 4.4 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
- CVSS 3.1 ([email protected])
- 4.4 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
- CVSS 2.0 ([email protected])
- 3.5 LOW — AV:N/AC:M/Au:S/C:N/I:N/A:P
- Weaknesses
- CWE-190
Description
An issue was discovered in the _send_secure_msg() function of Yubico yubihsm-shell through 2.0.3. The function does not correctly validate the embedded length field of an authenticated message received from the device because response_msg.st.len=8 can be accepted but triggers an integer overflow, which causes CRYPTO_cbc128_decrypt (in OpenSSL) to encounter an undersized buffer and experience a segmentation fault. The yubihsm-shell project is included in the YubiHSM 2 SDK product.
Affected configurations
• yubico yubihsm-shell (<= 2.0.3)
Related
Weakness · CWE (1)
- CWE-190 Integer Overflow or Wraparound weakness
References
- https://blog.inhq.net/posts/yubico-libyubihsm-vuln2/#second-attack-variant-cve-pending Exploit, Third Party Advisory
- https://blog.inhq.net/posts/yubico-libyubihsm-vuln2/#second-attack-variant-cve-pending Exploit, Third Party Advisory