4.4

CVE-2021-27217

Exploit
An issue was discovered in the _send_secure_msg() function of Yubico yubihsm-shell through 2.0.3. The function does not correctly validate the embedded length field of an authenticated message received from the device. Out-of-bounds reads performed by aes_remove_padding() can crash the running process, depending on the memory layout. This could be used by an attacker to cause a client-side denial of service. The yubihsm-shell project is included in the YubiHSM 2 SDK product.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Yubico ≫ Yubihsm-shell Version <= 2.0.3
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 1.6% 0.725
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 4.4 0.7 3.6
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
nvd@nist.gov 3.5 6.8 2.9
AV:N/AC:M/Au:S/C:N/I:N/A:P
CWE-125 Out-of-bounds Read

The product reads data past the end, or before the beginning, of the intended buffer.

https://blog.inhq.net/posts/yubico-libyubihsm-vuln2
Third Party Advisory
Exploit
https://github.com/Yubico/yubihsm-shell/releases
Third Party Advisory
Release Notes
https://www.yubico.com/support/security-advisories/ysa-2021-01/
Vendor Advisory