CVE-2021-27217: Medium severity yubico yubihsm shell vulnerability
An issue was discovered in the sendsecuremsg() 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. Out-of-bounds reads performed by aesremovepadding() can crash the running process, depending on the memory layout. This could be used by an attacker to cause a client-side denial of service. The yubihsm-shell project is included in the YubiHSM 2 SDK product.
Affected Software
Event History
Frequently Asked Questions
What is CVE-2021-27217?
CVE-2021-27217 is a vulnerability in the _send_secure_msg() function of Yubico yubihsm-shell through version 2.0.3. It allows for out-of-bounds reads that can crash the running process.
What is the severity of CVE-2021-27217?
The severity of CVE-2021-27217 is medium with a CVSS score of 4.4.
How does CVE-2021-27217 impact Yubico yubihsm-shell?
CVE-2021-27217 impacts Yubico yubihsm-shell by allowing for out-of-bounds reads that can crash the running process.
How can CVE-2021-27217 be fixed?
To fix CVE-2021-27217, update Yubico yubihsm-shell to version 2.0.4 or later.
Are there any references for CVE-2021-27217?
Yes, here are some references for CVE-2021-27217: [1] [2] [3]