#VU76973 Improper Neutralization of Special Elements in Output Used by a Downstream Component in nodemailer - CVE-2020-7769

Vulnerability identifier: #VU76973

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2020-7769

CWE-ID: CWE-74

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
nodemailer
Other software / Other software solutions

Vendor: nodemailer

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to use of crafted recipient email addresses. A remote unauthenticated attacker can trigger the vulnerability resulting in arbitrary command flag injection in sendmail transport for sending mails.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

nodemailer: before 6.4.16

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External links
https://snyk.io/vuln/SNYK-JS-NODEMAILER-1038834
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1039742
https://github.com/nodemailer/nodemailer/blob/33b62e2ea6bc9215c99a9bb4bfba94e2fb27ebd0/lib/sendmail-transport/index.js%23L75
https://github.com/nodemailer/nodemailer/commit/ba31c64c910d884579875c52d57ac45acc47aa54

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.