Vulnerabilities > CVE-2020-24387 - Out-of-bounds Write vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
NONE Integrity impact
NONE Availability impact
HIGH Summary
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.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| Application | 3 | |
| OS | 1 |
Common Weakness Enumeration (CWE)
References
- https://www.yubico.com/support/security-advisories/ysa-2020-06/
- https://developers.yubico.com/yubihsm-shell/
- https://github.com/Yubico/yubihsm-shell
- https://blog.inhq.net/posts/yubico-libyubihsm-vuln/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y77KQJW76M3PFOBFLBT6DLH2NWHYRNZO/