Vulnerability Report

CVE-2020-24387

Title: yubihsm-shell Out-of-Bounds Read/Write DoS

DoS

Proof Of Concept

No public PoC currently indexed for CVE-2020-24387.

CWE Category CWE-125
Published Date Oct 19, 2020
Modified Date Nov 21, 2024
Exploit Status Not Found
Score 7.5 CVSS v3.1
Exploit Probability (EPSS)
1.73%

Vulnerability Summary

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.

Impacted Vendors

Y
yubico 1

Reference Links

https://blog.inhq.net/posts/yubico-libyubihsm-vuln/ https://developers.yubico.com/yubihsm-shell/ https://github.com/Yubico/yubihsm-shell https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y77KQJW76M3PFOBFLBT6DLH2NWHYRNZO/ https://www.yubico.com/support/security-advisories/ysa-2020-06/ https://blog.inhq.net/posts/yubico-libyubihsm-vuln/ https://developers.yubico.com/yubihsm-shell/ https://github.com/Yubico/yubihsm-shell https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y77KQJW76M3PFOBFLBT6DLH2NWHYRNZO/ https://www.yubico.com/support/security-advisories/ysa-2020-06/
CVSS v3.1
Source Entity [email protected]
Severity HIGH
7.5
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v2.0
Source Entity [email protected]
Severity MEDIUM
5.0
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:N/AC:L/Au:N/C:N/I:N/A:P

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2020-24387 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Stack

No specific products linked.