CVEvulnerability
CVE-2020-24387
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2020-10-19
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS 2.0 ([email protected])
- 5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:N/A:P
- Weaknesses
- CWE-125, CWE-787
Description
An issue was discovered in the yh_create_session() function of yubihsm-shell through 2.0.2. The function does not explicitly check the returned session id from the device. An invalid session id would lead to out-of-bounds read and write operations in the session array. This could be used by an attacker to cause a denial of service attack.
Affected configurations
• yubico yubihsm-shell (<= 2.0.2)
• fedoraproject fedora 33
Related
References
- https://blog.inhq.net/posts/yubico-libyubihsm-vuln/ Exploit, Third Party Advisory
- https://developers.yubico.com/yubihsm-shell/ Vendor Advisory
- https://github.com/Yubico/yubihsm-shell Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y77KQJW76M3PFOBFLBT6DLH2NWHYRNZO/ lists.fedoraproject.org
- https://www.yubico.com/support/security-advisories/ysa-2020-06/ Vendor Advisory
- https://blog.inhq.net/posts/yubico-libyubihsm-vuln/ Exploit, Third Party Advisory
- https://developers.yubico.com/yubihsm-shell/ Vendor Advisory
- https://github.com/Yubico/yubihsm-shell Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y77KQJW76M3PFOBFLBT6DLH2NWHYRNZO/ lists.fedoraproject.org
- https://www.yubico.com/support/security-advisories/ysa-2020-06/ Vendor Advisory