CVE-2020-24387
First published: Mon Oct 19 2020(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Yubico yubihsm-shell | <=2.0.2 | |
| Fedoraproject Fedora | =33 |
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Reference Links
- 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@lists.fedoraproject.org/message/Y77KQJW76M3PFOBFLBT6DLH2NWHYRNZO/
- https://www.yubico.com/support/security-advisories/ysa-2020-06/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y77KQJW76M3PFOBFLBT6DLH2NWHYRNZO/
Frequently Asked Questions
What is the vulnerability ID of this issue?
The vulnerability ID of this issue is CVE-2020-24387.
What is the severity of CVE-2020-24387?
The severity of CVE-2020-24387 is high with a CVSS score of 7.5.
What software versions are affected by CVE-2020-24387?
Yubico yubihsm-shell version up to and including 2.0.2, and Fedora version 33 are affected by CVE-2020-24387.
How can an attacker exploit CVE-2020-24387?
An attacker can exploit CVE-2020-24387 by using an invalid session ID to perform out-of-bounds read and write operations in the session array.
Are there any references related to CVE-2020-24387?
Yes, you can find references related to CVE-2020-24387 at the following links: [link1](https://blog.inhq.net/posts/yubico-libyubihsm-vuln/), [link2](https://developers.yubico.com/yubihsm-shell/), [link3](https://github.com/Yubico/yubihsm-shell).
- collector/nvd-index
- agent/weakness
- agent/author
- agent/severity
- agent/references
- agent/last-modified-date
- agent/softwarecombine
- agent/first-publish-date
- agent/tags
- agent/type
- agent/description
- agent/event
- collector/mitre-cve
- source/MITRE
- vendor/yubico
- canonical/yubico yubihsm-shell
- version/yubico yubihsm-shell/2.0.2
- vendor/fedoraproject
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- version/fedoraproject fedora/33