CVE-2021-36219
CRITICALEPSS 75th pctlDescription
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.
How to fix
No published remediation has been found for this vulnerability's affected products yet.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploit Intelligence
Elevated risk: more likely to be exploited than 75% of all known CVEs.
References
Related Vulnerabilities
Other CWE-824 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2018-9948 | Medium | 6.5 | 64% | - | - |
| CVE-2018-11803 | High | 7.5 | 58% | - | Fix |
| CVE-2022-21971 | High | 7.8 | 54% | KEV | Fix |
| CVE-2010-1818 | High | 9.3 | 43% | - | - |
| CVE-2015-1770 | High | 8.8 | 35% | KEV | - |
| CVE-2017-12561 | Critical | 9.8 | 31% | - | - |
Common questions
How do I fix CVE-2021-36219?
No published fix for CVE-2021-36219 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
Is CVE-2021-36219 being actively exploited?
Not that we know of. CVE-2021-36219 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 1.7% is the estimated probability that it will be exploited in the next 30 days. That is higher than 75% of all scored CVEs.
How severe is CVE-2021-36219?
CVE-2021-36219 has a CVSS v3 base score of 9.8, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.