Vulnerability Details CVE-2020-24387
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.008
EPSS Ranking 72.6%
CVSS Severity
CVSS v3 Score 7.5
CVSS v2 Score 5.0
References
- https://blog.inhq.net/posts/yubico-libyubihsm-vuln/
- https://developers.yubico.com/yubihsm-shell/
- https://github.com/Yubico/yubihsm-shell
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y77KQJW76M3PFOBFLBT6DLH2NWHYRNZO/
- https://www.yubico.com/support/security-advisories/ysa-2020-06/
- https://blog.inhq.net/posts/yubico-libyubihsm-vuln/
- https://developers.yubico.com/yubihsm-shell/
- https://github.com/Yubico/yubihsm-shell
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y77KQJW76M3PFOBFLBT6DLH2NWHYRNZO/
- https://www.yubico.com/support/security-advisories/ysa-2020-06/
Products affected by CVE-2020-24387
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cpe:2.3:a:yubico:yubihsm-shell:2.0.0
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cpe:2.3:a:yubico:yubihsm-shell:2.0.1
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cpe:2.3:a:yubico:yubihsm-shell:2.0.2
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cpe:2.3:o:fedoraproject:fedora:33