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.

CVSS v3 4.4 MEDIUM
CVSS v2.0 3.5 LOW

4.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 0.7 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

3.5^/10

CVSS v2.0 : LOW

Vector : AV:N/AC:M/Au:S/C:N/I:N/A:P

Exploitability : 6.8 / Impact : 2.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication SINGLE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://blog.inhq.net/posts/yubico-libyubihsm-vuln2/#second-attack-variant-cve-pending	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:yubico:yubihsm-shell:*:*:*:*:*:*:*:*

History

19 May 2021, 18:44

Type	Values Removed	Values Added
CPE		cpe:2.3:a:yubico:yubihsm-shell::::::::
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : 3.5 v3 : 4.4
CWE		CWE-190
References	~~(MISC) https://blog.inhq.net/posts/yubico-libyubihsm-vuln2/#second-attack-variant-cve-pending -~~	(MISC) https://blog.inhq.net/posts/yubico-libyubihsm-vuln2/#second-attack-variant-cve-pending - Exploit, Third Party Advisory

10 May 2021, 22:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2021-05-10 22:15

Updated : 2023-12-10 13:55

NVD link : CVE-2021-32489

Mitre link : CVE-2021-32489

CVE.ORG link : CVE-2021-32489

JSON object : View

Products Affected

yubico

yubihsm-shell

CWE

CWE-190

Integer Overflow or Wraparound

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