CVE-2021-38189 : An issue was discovered in the lettre crate before 0.9.6 for Rust. In an e-mail

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.

Published 2021-08-08 06:15:09

Updated 2021-08-16 19:15:48

Source MITRE

View at NVD, CVE.org

Products affected by CVE-2021-38189

Lettre » Lettre » For Rust
Versions before (<) 0.9.6
cpe:2.3:a:lettre:lettre:*:*:*:*:*:rust:*:*
Matching versions
Lettre » Lettre » Version: 0.10.0 Update Alpha1 For Rust
cpe:2.3:a:lettre:lettre:0.10.0:alpha1:*:*:*:rust:*:*
Matching versions
Lettre » Lettre » Version: 0.10.0 Update Alpha2 For Rust
cpe:2.3:a:lettre:lettre:0.10.0:alpha2:*:*:*:rust:*:*
Matching versions
Lettre » Lettre » Version: 0.10.0 Update Alpha3 For Rust
cpe:2.3:a:lettre:lettre:0.10.0:alpha3:*:*:*:rust:*:*
Matching versions
Lettre » Lettre » Version: 0.10.0 Update Alpha4 For Rust
cpe:2.3:a:lettre:lettre:0.10.0:alpha4:*:*:*:rust:*:*
Matching versions
Lettre » Lettre » Version: 0.10.0 Update Alpha5 For Rust
cpe:2.3:a:lettre:lettre:0.10.0:alpha5:*:*:*:rust:*:*
Matching versions
Lettre » Lettre » Version: 0.10.0 Update Beta1 For Rust
cpe:2.3:a:lettre:lettre:0.10.0:beta1:*:*:*:rust:*:*
Matching versions
Lettre » Lettre » Version: 0.10.0 Update Beta2 For Rust
cpe:2.3:a:lettre:lettre:0.10.0:beta2:*:*:*:rust:*:*
Matching versions
Lettre » Lettre » Version: 0.10.0 Update Beta3 For Rust
cpe:2.3:a:lettre:lettre:0.10.0:beta3:*:*:*:rust:*:*
Matching versions
Lettre » Lettre » Version: 0.10.0 Update Beta4 For Rust
cpe:2.3:a:lettre:lettre:0.10.0:beta4:*:*:*:rust:*:*
Matching versions
Lettre » Lettre » Version: 0.10.0 Update RC1 For Rust
cpe:2.3:a:lettre:lettre:0.10.0:rc1:*:*:*:rust:*:*
Matching versions
Lettre » Lettre » Version: 0.10.0 Update RC2 For Rust
cpe:2.3:a:lettre:lettre:0.10.0:rc2:*:*:*:rust:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2021-38189

EPSS FAQ

0.48%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 62 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-38189

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
7.5	HIGH	AV:N/AC:L/Au:N/C:P/I:P/A:P	10.0	6.4	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: Partial
9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	3.9	5.9	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE ids for CVE-2021-38189

CWE-77 Improper Neutralization of Special Elements used in a Command ('Command Injection')

The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-38189

https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/lettre/RUSTSEC-2021-0069.md

Third Party Advisory
https://rustsec.org/advisories/RUSTSEC-2021-0069.html

RUSTSEC-2021-0069: lettre: SMTP command injection in body › RustSec Advisory Database
Exploit;Issue Tracking;Patch;Third Party Advisory

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Vulnerability Details : CVE-2021-38189

Products affected by CVE-2021-38189

Exploit prediction scoring system (EPSS) score for CVE-2021-38189

CVSS scores for CVE-2021-38189

CWE ids for CVE-2021-38189

References for CVE-2021-38189