Use After Free in Rust-Openssl Project

CVE-2018-20997

An issue was discovered in the openssl crate before 0.10.9 for Rust. A use-after-free occurs in CMS Signing.

Vulnerability class: Use-After-Free

Published · last modified .

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.017 (76.9th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 76.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2018-20997: held from 0.017 to 0.017.

EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2018-20997?
CVE-2018-20997 is a critical-severity vulnerability in Rust-Openssl Project, classified under Use After Free. CVSS score: 9.8/10. Published 2019-08-26.
How severe is CVE-2018-20997?
Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2018-20997 known to be exploited?
4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.