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.

CVSS v3.0 9.8 CRITICAL
CVSS v2.0 10.0 HIGH

9.8^/10

CVSS v3.0 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

10.0^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:N/C:C/I:C/A:C

Exploitability : 10.0 / Impact : 10.0

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://www.openbsd.org/security.html	Third Party Advisory
https://www.openwall.com/lists/oss-security/2020/02/24/5	Exploit Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/02/26/1
https://www.debian.org/security/2020/dsa-4634
http://seclists.org/fulldisclosure/2020/Feb/32
http://www.openwall.com/lists/oss-security/2020/03/01/1
http://www.openwall.com/lists/oss-security/2020/03/01/2
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/
https://usn.ubuntu.com/4294-1/
http://www.openwall.com/lists/oss-security/2021/05/04/7

Configurations

Configuration 1 (hide)

cpe:2.3:a:opensmtpd:opensmtpd:*:*:*:*:*:*:*:*

Information

Published : 2020-02-25 17:15

Updated : 2021-05-04 18:15

NVD link : CVE-2020-8794

Mitre link : CVE-2020-8794

JSON object : View

Products Affected

opensmtpd

opensmtpd

CWE

CWE-125

Out-of-bounds Read

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