Buffer overflow in Yubico Yubihsm-Shell
CVE-2020-24388
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.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.018 (75.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Yubico Yubihsm-shell
- Fedoraproject Fedora — versions 33
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (x_refsource_MISC, Vendor Advisory)
- cve@mitre.org (x_refsource_MISC, Vendor Advisory)
- cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (x_refsource_FEDORA, vendor-advisory)
Frequently asked questions
- What is CVE-2020-24388?
- CVE-2020-24388 is a high-severity vulnerability in Yubico Yubihsm-Shell, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2020-10-19.
- How severe is CVE-2020-24388?
- High severity. CVSS v3 base score is 7.5 out of 10.