Vulnerability in Skale Sgxwallet
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.017 (76.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 76.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000
Affected products
- Skale Sgxwallet — versions 1.58.3
Weakness classification (CWE)
References
- github.com/skalenetwork/sgxwallet/releases (Third Party Advisory, Release Notes)
- github.com/skalenetwork/sgxwallet/commit/4e9b5b7526db083177e81f8bafeaa4914d276a… (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-36219?
- CVE-2021-36219 is a critical-severity vulnerability in Skale Sgxwallet, classified under Access of Uninitialized Pointer. CVSS score: 9.8/10. Published 2021-09-27.
- How severe is CVE-2021-36219?
- Critical severity. CVSS v3 base score is 9.8 out of 10.