CVE-2020-24388: Input Validation
First published: Mon Oct 19 2020(Updated: )
An issue was discovered in the _send_secure_msg() function of yubihsm-shell through 2.0.2. The function does not validate the embedded length field of a message received from the device. This could lead to an oversized memcpy() call that will crash the running process. This could be used by an attacker to cause a denial of service.
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 in yubihsm-shell?
The vulnerability ID of this issue in yubihsm-shell is CVE-2020-24388.
What is the severity of CVE-2020-24388?
The severity of CVE-2020-24388 is high with a CVSS score of 7.5.
How does CVE-2020-24388 affect the Yubico yubihsm-shell?
CVE-2020-24388 affects the Yubico yubihsm-shell version up to and including 2.0.2.
What is the impact of CVE-2020-24388?
CVE-2020-24388 can lead to a crash of the running process due to an oversized memcpy() call.
How can I fix CVE-2020-24388?
To fix CVE-2020-24388, it is recommended to update to a version of yubihsm-shell that is not affected by the vulnerability.
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