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4.7
CVSSv3

CVE-2020-8793

Published: 25/02/2020 Updated: 07/11/2023
CVSS v2 Base Score: 4.7 | Impact Score: 6.9 | Exploitability Score: 3.4
CVSS v3 Base Score: 4.7 | Impact Score: 3.6 | Exploitability Score: 1
VMScore: 475
Vector: AV:L/AC:M/Au:N/C:C/I:N/A:N
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Vulnerability Summary

OpenSMTPD prior to 6.6.4 allows local users to read arbitrary files (e.g., on some Linux distributions) because of a combination of an untrusted search path in makemap.c and race conditions in the offline functionality in smtpd.c.

Vulnerability Trend

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opensmtpd opensmtpd

fedoraproject fedora 32

canonical ubuntu linux 18.04

canonical ubuntu linux 19.10

Vendor Advisories

Ubuntu Security Notice: OpenSMTPD vulnerabilities
Several security issues were fixed in opensmtpd ...

Exploits

Exploit DB: OpenSMTPD 6.6.3 - Arbitrary File Read
# Title: OpenSMTPD 663 - Arbitrary File Read # Date: 2020-02-20 # Author: qualys # Vendor: wwwopensmtpdorg/ # CVE: 2020-8793 /* * Local information disclosure in OpenSMTPD (CVE-2020-8793) * Copyright (C) 2020 Qualys, Inc * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Gener ...

Mailing Lists

Full Disclosure: Local information disclosure in OpenSMTPD (CVE-2020-8793)
<!--X-Body-Begin--> <!--X-User-Header--> Full Disclosure mailing list archives <!--X-User-Header-End--> <!--X-TopPNI--> By Date By Thread </form> <!--X-TopPNI-End--> <!--X-MsgBody--> <!--X-Subject-Header-Begin--> Local information disclosure in OpenSMTPD (CVE-2020-8793) <!--X-Subject-Header-End--> <!--X-Head-of-Message--> From: ...
Full Disclosure: Local information disclosure in OpenSMTPD (CVE-2020-8793)
<!--X-Body-Begin--> <!--X-User-Header--> oss-sec mailing list archives <!--X-User-Header-End--> <!--X-TopPNI--> By Date By Thread </form> <!--X-TopPNI-End--> <!--X-MsgBody--> <!--X-Subject-Header-Begin--> Local information disclosure in OpenSMTPD (CVE-2020-8793) <!--X-Subject-Header-End--> <!--X-Head-of-Message--> From: Qualys ...

Github Repositories

https://github.com/DmitrijVC/OpenSMTPD-RS

Rust port of the /helIsec/OpenSMTPD

OpenSMTPD-RS A mass exploitation tool for CVE 2020-8793 (Rust port) Info It's just a Rust port (made in 2 hours, so not fully tested) Original work can be found here The Shodan API to find vulnerable devices and mass sends a payload to the target To customize the payload : streamwrite(format!("MAIL FROM:&lt;;{};&gt;\r\n", payload)as_bytes())?; Chang

References

CWE-426CWE-367https://www.openbsd.org/security.htmlhttp://www.openwall.com/lists/oss-security/2020/02/24/4http://seclists.org/fulldisclosure/2020/Feb/28https://usn.ubuntu.com/4294-1/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/https://usn.ubuntu.com/4294-1/https://nvd.nist.govhttps://www.exploit-db.com/exploits/48139
CVSSv3
CVSSv2
CVSSv3
VMScore
Recommendations:
CVE-2024-27322CVE-2006-4304wirelessCVE-2023-23022local file inclusionCVE-2024-27058CVE-2024-33820open redirectCVE-2024-27079
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