CVE-2020-8793

OpenSMTPD 6.6.3 - Arbitrary File Read

Severity Score

4.7

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

OpenSMTPD before 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.

OpenSMTPD versiones anteriores a 6.6.4, permite a usuarios locales leer archivos arbitrarios (por ejemplo, en algunas distribuciones de Linux) debido a una combinación de una ruta de búsqueda no confiable en el archivo makemap.c y unas condiciones de carrera en la funcionalidad offline en el archivo smtpd.c.

*Credits: N/A

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Local

Attack Complexity

Medium

Authentication

None

Confidentiality

Complete

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-02-07 CVE Reserved
2020-02-25 CVE Published
2020-02-26 First Exploit
2023-03-08 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition
CWE-426: Untrusted Search Path

CAPEC

References (6)

URL	Tag	Source
http://seclists.org/fulldisclosure/2020/Feb/28	Mailing List
https://www.openbsd.org/security.html	Third Party Advisory

URL	Date	SRC
https://www.exploit-db.com/exploits/48139	2020-02-26
http://www.openwall.com/lists/oss-security/2020/02/24/4	2024-08-04

URL	Date	SRC

URL	Date	SRC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E	2023-11-07
https://usn.ubuntu.com/4294-1	2023-11-07

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Opensmtpd Search vendor "Opensmtpd"		Opensmtpd Search vendor "Opensmtpd" for product "Opensmtpd"				< 6.6.4 Search vendor "Opensmtpd" for product "Opensmtpd" and version " < 6.6.4"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				32 Search vendor "Fedoraproject" for product "Fedora" and version "32"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				18.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "18.04"		lts		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				19.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "19.10"		-		Affected