CVE-2021-32489

Published: May 10, 2021Modified: Nov 21, 2024

4.4

Vector

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H

Exploitability: 0.7 / Impact: 3.6

Source: NVD

Description

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.

Affected (1)

Products: Yubico: Yubihsm Shell

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Yubico Yubihsm Shell	Up to 2.0.3

Related CWEs

Integer Overflow or Wraparound

The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

References (2)

https://blog.inhq.net/posts/yubico-libyubihsm-vuln2/#second-attack-variant-cve-pending

Source: cve@mitre.org

ExploitThird Party Advisory

https://blog.inhq.net/posts/yubico-libyubihsm-vuln2/#second-attack-variant-cve-pending

Source: af854a3a-2127-422b-91ae-364da2661108

ExploitThird Party Advisory

Timeline

No history available yet.