7.5

CVE-2020-24387

Exploit
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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Yubico ≫ Yubihsm-shell Version <= 2.0.2
Fedoraproject ≫ Fedora Version33
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 1.73% 0.747
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvd@nist.gov 5 10 2.9
AV:N/AC:L/Au:N/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.

CWE-787 Out-of-bounds Write

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

https://blog.inhq.net/posts/yubico-libyubihsm-vuln/
Third Party Advisory
Exploit
https://developers.yubico.com/yubihsm-shell/
Vendor Advisory
https://github.com/Yubico/yubihsm-shell
Third 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