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.

CVSS v3.1

7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v2.0

5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P

EPSS

1.75% chance of exploitation in the next 30 days, 76th percentile

Published

2020-10-19

Updated

2024-08-04

Proof-of-concept exploits (1)

• https://blog.inhq.net/posts/yubico-libyubihsm-vuln/

References

• CVE Record
• NVD entry

Related

• CVE-2020-24381
• CVE-2020-24388
• CVE-2020-24379
• CVE-2020-24391
• CVE-2020-24372
• CVE-2020-24397