RCE in Lettre
CVE-2021-38189
An issue was discovered in the lettre crate before 0.9.6 for Rust. In an e-mail message body, an attacker can place a . character after two <CR><LF> sequences and then inject arbitrary SMTP commands.
Vulnerability class: Command Injection (OS Command Injection)
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: 0.015 (73.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 73.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000
Affected products
- Lettre — versions 0.10.0
Weakness classification (CWE)
References
- rustsec.org/advisories/RUSTSEC-2021-0069.html (Exploit, Patch, Third Party Advisory, Issue Tracking)
- raw.githubusercontent.com/rustsec/advisory-db/main/crates/lettre/RUSTSEC-2021-0… (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-38189?
- CVE-2021-38189 is a critical-severity vulnerability in Lettre, classified under Command Injection. CVSS score: 9.8/10. Published 2021-08-08.
- How severe is CVE-2021-38189?
- Critical severity. CVSS v3 base score is 9.8 out of 10.