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Vulnerability Details : CVE-2020-8794

OpenSMTPD before 6.6.4 allows remote code execution because of an out-of-bounds read in mta_io in mta_session.c for multi-line replies. Although this vulnerability affects the client side of OpenSMTPD, it is possible to attack a server because the server code launches the client code during bounce handling.
Publish Date : 2020-02-25 Last Update Date : 2021-05-04
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- CVSS Scores & Vulnerability Types

CVSS Score
10.0
Confidentiality Impact Complete (There is total information disclosure, resulting in all system files being revealed.)
Integrity Impact Complete (There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the entire system being compromised.)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Execute Code
CWE ID 125

- Products Affected By CVE-2020-8794

# Product Type Vendor Product Version Update Edition Language
1 Application Opensmtpd Opensmtpd * * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Opensmtpd Opensmtpd 1

- References For CVE-2020-8794

https://www.openbsd.org/security.html
https://www.openwall.com/lists/oss-security/2020/02/24/5
http://www.openwall.com/lists/oss-security/2020/02/26/1
MLIST [oss-security] 20200226 Re: LPE and RCE in OpenSMTPD's default install (CVE-2020-8794)
https://www.debian.org/security/2020/dsa-4634
DEBIAN DSA-4634
http://seclists.org/fulldisclosure/2020/Feb/32
FULLDISC 20200227 LPE and RCE in OpenSMTPD's default install (CVE-2020-8794)
http://www.openwall.com/lists/oss-security/2020/03/01/1
MLIST [oss-security] 20200301 Re: LPE and RCE in OpenSMTPD's default install (CVE-2020-8794)
http://www.openwall.com/lists/oss-security/2020/03/01/2
MLIST [oss-security] 20200301 Re: LPE and RCE in OpenSMTPD's default install (CVE-2020-8794)
http://packetstormsecurity.com/files/156633/OpenSMTPD-Out-Of-Bounds-Read-Local-Privilege-Escalation.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/
FEDORA FEDORA-2020-b92d7083ca
https://usn.ubuntu.com/4294-1/
UBUNTU USN-4294-1
http://www.openwall.com/lists/oss-security/2021/05/04/7
MLIST [oss-security] 20210504 21Nails: Multiple vulnerabilities in Exim

- Metasploit Modules Related To CVE-2020-8794

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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