Vulnerability Report

CVE-2021-43399

Title: Yubico YubiHSM2 library length validation issue

Proof Of Concept

No public PoC currently indexed for CVE-2021-43399.

CWE Category CWE-787

Published Date Dec 08, 2021

Modified Date Nov 21, 2024

Exploit Status Not Found

Score 7.5 CVSS v3.1

Exploit Probability (EPSS)

1.37%

Vulnerability Summary

CVE-2021-43399: The Yubico YubiHSM YubiHSM2 library 2021.08, included in the yubihsm-shell project, does not properly validate the length of some operations including SSH signing requests, and some data operations received from a YubiHSM 2 device.

Impacted Vendors

yubico 1

Reference Links

https://blog.inhq.net/posts/yubico-yubihsm-shell-vuln3/ https://www.yubico.com/support/security-advisories/ysa-2021-04/ https://blog.inhq.net/posts/yubico-yubihsm-shell-vuln3/ https://www.yubico.com/support/security-advisories/ysa-2021-04/

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 HIGH

7.8

Access Vector

N/A

Authentication

N/A

RAW VECTOR AV:N/AC:L/Au:N/C:N/I:N/A:C

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2021-43399 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

November 21, 2024 MODIFIED

Vulnerability data or affected products updated.

December 08, 2021 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.