RCE in Better-Macro Project
CVE-2021-38196
An issue was discovered in the better-macro crate through 2021-07-22 for Rust. It intentionally demonstrates that remote attackers can execute arbitrary code via proc-macros, and otherwise has no legitimate purpose.
Vulnerability class: RCE (Remote Code Execution)
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: 0.026 (84.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 84.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.026 · newest: 0.026 · change: 0.000
Affected products
Weakness classification (CWE)
References
- rustsec.org/advisories/RUSTSEC-2021-0077.html (Exploit, Patch, Third Party Advisory, Issue Tracking)
- raw.githubusercontent.com/rustsec/advisory-db/main/crates/better-macro/RUSTSEC-… (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-38196?
- CVE-2021-38196 is a critical-severity vulnerability in Better-Macro Project, classified under Code Injection. CVSS score: 9.8/10. Published 2021-08-08.
- How severe is CVE-2021-38196?
- Critical severity. CVSS v3 base score is 9.8 out of 10.