PT-2020-20283 · Openbsd+1 · Opensmtpd+1

Published 2020-02-25 · Updated 2022-01-01 · CVE-2020-8793

Positive Technologies (AI Summary)

CVSS v3.1

4.7

Medium

Base vector

AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions OpenSMTPD versions prior to 6.6.4

Description The issue allows local users to read arbitrary files due to a combination of an untrusted search path in makemap.c and race conditions in the offline functionality in smtpd.c. This can be particularly problematic on some Linux distributions.

Recommendations For versions prior to 6.6.4, update to version 6.6.4 or later to resolve the issue. As a temporary workaround, consider restricting access to sensitive files that could be read through this vulnerability until the update is applied.

Exploit

Fix

Time Of Check To Time Of Use

Untrusted Search Path

Weakness Enumeration

CWE-367

CWE-426

Related Identifiers

CVE-2020-8793

USN-4294-1

USN-4875-1

Affected Products

Opensmtpd

Ubuntu

References · 30

• 🔥 https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/unix/smtp/opensmtpd_mail_from_rce.rb · Exploit
• 🔥 https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/unix/local/opensmtpd_oob_read_lpe.rb · Exploit
• 🔥 https://github.com/FiroSolutions/cve-2020-7247-exploit · Exploit
• 🔥 https://github.com/QTranspose/CVE-2020-7247-exploit · Exploit
• 🔥 https://github.com/superzerosec/cve-2020-7247 · Exploit
• 🔥 https://github.com/r0lh/CVE-2020-7247 · Exploit
• 🔥 https://exploit-db.com/exploits/48139 · Exploit
• 🔥 http://openwall.com/lists/oss-security/2020/02/24/4 · Exploit
• https://usn.ubuntu.com/4294-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-8793 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-7247 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-8794 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2020-8793 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-8793 · Security Note
• https://ubuntu.com/security/notices/USN-4875-1 · Vendor Advisory