CVE-2018-20742

FAUCET Score

CVE-2018-20742 is a high-severity vulnerability affecting UC Berkeley RISE Opaque versions prior to 2018-12-01. The flaw stems from a missing boundary check in ocall_malloc, allowing an attacker to obtain a pointer to enclave memory. This could lead to an arbitrary enclave memory write, resulting in a high impact on integrity. Despite its severity, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		< 2018-12-01CPE matchmatch criteria	cpe:2.3:a:ucbrise:opaque::::::::

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

Exploitability Score

3.9

Impact Score

3.6

CvssVersion

3.0

Exploit Intelligence

EPSS Score

1.39%

Probability of exploitation in next 30 days

EPSS Percentile

69.4%

Percentile rank of EPSS score among Peer Group

As of 2026-07-26

Model: v2026.06.15

This CVE's current EPSS score of 0.0138 is in the 50th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference

View patch

References

github.com / ucbrise/opaque/commit/5ddda15d89f5ac82f4416208c5319ace4aecdc36

PatchThird Party Advisory

github.com / ucbrise/opaque/issues/66

ExploitPatchThird Party Advisory