Vulnerability Report

CVE-2021-32489

Title: Yubico Yubihsm-Shell Memory Corruption

Memory Corruption

Proof Of Concept

No public PoC currently indexed for CVE-2021-32489.

CWE Category CWE-190
Published Date May 10, 2021
Modified Date Nov 21, 2024
Exploit Status Not Found
Score 4.4 CVSS v3.1
Exploit Probability (EPSS)
0.92%

Vulnerability Summary

CVE-2021-32489: 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 because response_msg.st.len=8 can be accepted but triggers an integer overflow, which causes CRYPTO_cbc128_decrypt (in OpenSSL) to encounter an undersized buffer and experience a segmentation fault. The yubihsm-shell project is included in the YubiHSM 2 SDK product.

Impacted Vendors

Y
yubico 1

Reference Links

https://blog.inhq.net/posts/yubico-libyubihsm-vuln2/#second-attack-variant-cve-pending https://blog.inhq.net/posts/yubico-libyubihsm-vuln2/#second-attack-variant-cve-pending
CVSS v3.1
Source Entity [email protected]
Severity MEDIUM
4.4
Attack Vector
NETWORK
Complexity
HIGH
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
CVSS v3.1
Source Entity [email protected]
Severity MEDIUM
4.4
Attack Vector
NETWORK
Complexity
HIGH
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
CVSS v2.0
Source Entity [email protected]
Severity LOW
3.5
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:N/AC:M/Au:S/C:N/I:N/A:P

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2021-32489 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 HIGH
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H

Affected Stack

No specific products linked.