CVE-2020-36326

2021-04-2800:00:00

ubuntu.com

phpmailer

object injection

phar deserialization

addattachment

unc pathname

cve-2020-36326

vulnerability

commit e2e07a35

v6.1.8

CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.011

Percentile

84.4%

JSON

PHPMailer 6.1.8 through 6.4.0 allows object injection through Phar
Deserialization via addAttachment with a UNC pathname. NOTE: this is
similar to CVE-2018-19296, but arose because 6.1.8 fixed a functionality
problem in which UNC pathnames were always considered unreadable by
PHPMailer, even in safe contexts. As an unintended side effect, this fix
eliminated the code that blocked addAttachment exploitation.