VulnerabilityModified
CVE-2020-24388
This could lead to an oversized memcpy() call that will crash the running process.
HIGH 7.5EPSS 1.75%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.75%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.75% probability · 77th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-20, CWE-787
- Affected
- yubico/yubihsm-shell · fedoraproject/fedora
- Source
- cve@mitre.org
References
- https://blog.inhq.net/posts/yubico-libyubihsm-vuln/Exploit, Third Party Advisory
- https://developers.yubico.com/yubihsm-shell/Vendor Advisory
- https://github.com/Yubico/yubihsm-shellThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y77KQJW76M3PFOBFLBT6DLH2NWHYRNZO/
- https://www.yubico.com/support/security-advisories/ysa-2020-06/Vendor Advisory
- https://blog.inhq.net/posts/yubico-libyubihsm-vuln/Exploit, Third Party Advisory
- https://developers.yubico.com/yubihsm-shell/Vendor Advisory
- https://github.com/Yubico/yubihsm-shellThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y77KQJW76M3PFOBFLBT6DLH2NWHYRNZO/
- https://www.yubico.com/support/security-advisories/ysa-2020-06/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.