What’s Vulnerable › Vulnerabilities

CVE-2018-20742

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-01-24 · updated 2026-06-17
• Weakness: CWE-787

Description

An issue was discovered in UC Berkeley RISE Opaque before 2018-12-01. There is no boundary check on ocall_malloc. The return value could be a pointer to enclave memory. It could cause an arbitrary enclave memory write.

Affected products

• Ucbrise Opaque: before 2018-12-01 — fixed in 2018-12-01

How to fix

Upgrade to a fixed version: Ucbrise Opaque 2018-12-01. Check the vendor advisory for mitigations.

References

• https://github.com/ucbrise/opaque/commit/5ddda15d89f5ac82f4416208c5319ace4aecdc36
• https://github.com/ucbrise/opaque/issues/66
• https://github.com/ucbrise/opaque/commit/5ddda15d89f5ac82f4416208c5319ace4aecdc36
• https://github.com/ucbrise/opaque/issues/66

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