High severity7.5NVD Advisory· Published Oct 19, 2020· Updated Jun 17, 2026
CVE-2020-24387
CVE-2020-24387
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.
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Affected products
2- yubihsm-shell/yubihsm-shelldescription
- Range: <=2.0.2
Patches
Vulnerability mechanics
References
4- blog.inhq.net/posts/yubico-libyubihsm-vuln/nvdExploitThird Party Advisory
- developers.yubico.com/yubihsm-shell/nvdVendor Advisory
- www.yubico.com/support/security-advisories/ysa-2020-06/nvdVendor Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y77KQJW76M3PFOBFLBT6DLH2NWHYRNZO/nvd
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