Vulnerability Details CVE-2021-36219
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 54.0%
CVSS Severity
CVSS v3 Score 9.8
CVSS v2 Score 7.5
References