CVE-2021-38189

high-risk

Published 2021-08-08

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.

Do I need to act?

0.48% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Fix available

Upgrade to: 5e474677f9b9a7c68066fc5c9f6b6ec36f52c391

CVSS 9.8/10 Critical

NETWORK / LOW complexity

Affected Products (12)

Lettre

Affected Vendors

Lettre

References (4)

Third Party Advisory https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/lettre/RUSTSEC...

Exploit https://rustsec.org/advisories/RUSTSEC-2021-0069.html

Third Party Advisory https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/lettre/RUSTSEC...

Exploit https://rustsec.org/advisories/RUSTSEC-2021-0069.html

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high-risk

Severity 32/34 · Critical

Exploitability 2/34 · Minimal

Exposure 17/34 · Moderate