CVE Vulnerability

CVE-2020-24387

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.

5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

Scope

7.5 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://www.yubico.com/support/security-advisories/ysa-2020-06/ Vendor Advisory
https://developers.yubico.com/yubihsm-shell/ Vendor Advisory
https://github.com/Yubico/yubihsm-shell Third Party Advisory
https://blog.inhq.net/posts/yubico-libyubihsm-vuln/ Exploit Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/Y77KQJW76M3PFOBFLBT6DLH2NWHYRNZO/ Mailing List Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:yubico:yubihsm-shell:*:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
Information

Published : 2020-10-19 08:15

Updated : 2021-07-21 11:39

NVD link : CVE-2020-24387

Mitre link : CVE-2020-24387

Products Affected
No products.
CWE
CWE-125

Out-of-bounds Read

CWE-787