CVE-2021-36219 — CRITICAL (9.8)

Vulnerability Description

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.

CVSS Score

9.8

CRITICAL

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Skale	Sgxwallet	1.58.3

Related Weaknesses (CWE)

CWE-824

References

https://github.com/skalenetwork/sgxwallet/commit/4e9b5b7526db083177e81f8bafeaa49PatchThird Party Advisory
https://github.com/skalenetwork/sgxwallet/releasesRelease NotesThird Party Advisory
https://github.com/skalenetwork/sgxwallet/commit/4e9b5b7526db083177e81f8bafeaa49PatchThird Party Advisory
https://github.com/skalenetwork/sgxwallet/releasesRelease NotesThird Party Advisory

FAQ

What is CVE-2021-36219?

CVE-2021-36219 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 mult...

How severe is CVE-2021-36219?

CVE-2021-36219 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2021-36219?

Check the references section above for vendor advisories and patch information. Affected products include: Skale Sgxwallet.