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CVE-2020-8794

Publication date 25 February 2020

Last updated 24 July 2024

Ubuntu priority

High

Why this priority?

Cvss 3 Severity Score

9.8 · Critical

Score breakdown

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.

Status

Package Ubuntu Release Status
opensmtpd 24.04 LTS noble
Fixed 6.6.4p1-1
23.10 mantic
Fixed 6.6.4p1-1
23.04 lunar
Fixed 6.6.4p1-1
22.10 kinetic
Fixed 6.6.4p1-1
22.04 LTS jammy
Fixed 6.6.4p1-1
21.10 impish
Fixed 6.6.4p1-1
21.04 hirsute
Fixed 6.6.4p1-1
20.10 groovy
Fixed 6.6.4p1-1
20.04 LTS focal
Fixed 6.6.4p1-1
19.10 eoan
Fixed 6.0.3p1-6ubuntu0.2
18.04 LTS bionic
Fixed 6.0.3p1-1ubuntu0.2
16.04 LTS xenial
14.04 LTS trusty
Vulnerable

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Severity score breakdown

Parameter Value
Base score 9.8 · Critical
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

    • USN-4294-1
    • OpenSMTPD vulnerabilities
    • 2 March 2020
    • USN-4875-1
    • OpenSMTPD vulnerabilities
    • 15 March 2021

Other references