CVE-2021-36219: Critical severity skale sgxwallet vulnerability
An issue was discovered in SKALE sgxwallet 1.58.3. The provided input for ECALL 14 triggers a branch in trustedEcdsaSign that frees a non-initialized pointer from the stack. An attacker can chain multiple enclave calls to prepare a stack that contains a valid address. This address is then freed, resulting in compromised integrity of the enclave. This was resolved after v1.58.3 and not reproducible in sgxwallet v1.77.0.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2021-36219?
The severity of CVE-2021-36219 is critical with a score of 9.8.
What software is affected by CVE-2021-36219?
SKALE sgxwallet version 1.58.3 is affected by CVE-2021-36219.
How can an attacker exploit CVE-2021-36219?
An attacker can exploit CVE-2021-36219 by chaining multiple enclave calls to prepare a stack that contains a valid address and then freeing that address.
Is there a fix available for CVE-2021-36219?
Yes, a fix is available for CVE-2021-36219. It is recommended to update to the latest version of SKALE sgxwallet.
Where can I find more information about CVE-2021-36219?
You can find more information about CVE-2021-36219 on the GitHub repository and release page of SKALE sgxwallet.