What is CVE-2018-20997?

CVE-2018-20997 is a critical-severity vulnerability in Rust-openssl_project Rust-openssl, 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.

Use After Free in Rust-openssl_project Rust-openssl

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

EPSS: 0.017 (75.3th percentile) — read the EPSS interpretation.

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.

Affected products

Rust-openssl_project Rust-openssl
N/a — versions n/a

Weakness classification (CWE)

CWE-416 — Use After Free

Public proof-of-concept exploits

References

cve@mitre.org (Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2018-20997?: CVE-2018-20997 is a critical-severity vulnerability in Rust-openssl_project Rust-openssl, 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.