CVE-2021-36218 : Security Advisory and Response

An issue was discovered in SKALE sgxwallet 1.58.3 where a buffer overflow vulnerability in sgx_disp_ippsAES_GCMEncrypt allows an out-of-bounds write, leading to a segfault and compromised enclave. This vulnerability was addressed prior to version 1.77.0 and is not present in the latest release.

Understanding CVE-2021-36218

This section provides insights into the impact, technical details, and mitigation strategies related to CVE-2021-36218.

What is CVE-2021-36218?

The vulnerability in SKALE sgxwallet 1.58.3 enables an attacker to trigger an out-of-bounds write, potentially causing a segfault and compromising the enclave. Resolved in version 1.77.0, this issue poses a serious threat to the security of the enclave.

The Impact of CVE-2021-36218

The exploitation of this vulnerability could lead to unauthorized write operations beyond the boundaries of allocated memory, resulting in a denial of service or potential execution of arbitrary code within the enclave. It is critical for users to take immediate action to mitigate the risks associated with this security flaw.

Technical Details of CVE-2021-36218

Explore the specifics of the vulnerability, including its description, affected systems, versions, and exploitation mechanism.

Vulnerability Description

The vulnerability allows an out-of-bounds write operation in sgx_disp_ippsAES_GCMEncrypt, creating a risk of compromising the enclave's integrity and availability.

Affected Systems and Versions

SKALE sgxwallet version 1.58.3 is confirmed to be impacted by this vulnerability, whereas the issue has been resolved in the subsequent version 1.77.0.

Exploitation Mechanism

By leveraging the buffer overflow in sgx_disp_ippsAES_GCMEncrypt, threat actors can execute malicious code or trigger a denial of service, ultimately compromising the enclave's security.

Mitigation and Prevention

Learn how to safeguard your systems against CVE-2021-36218 and prevent potential security breaches.

Immediate Steps to Take

Users are advised to update their sgxwallet to the latest version, 1.77.0, to eliminate the vulnerability and enhance enclave security.

Long-Term Security Practices

Implementing secure coding practices, conducting regular security audits, and staying informed about updates and patches are essential for maintaining a robust security posture.

Patching and Updates

Stay vigilant for security advisories from SKALE network regarding CVE-2021-36218 and promptly apply patches and updates to mitigate the associated risks.