Exim < 4.93 Privilege Escalation vulnerability

high Nessus Plugin ID 135311
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Synopsis

The remote mail server is potentially affected by a privilege escalation vulnerability.

Description

According to its banner, the version of Exim running on the remote host is prior to 4.93. It is, therefore, potentially affected by a privilege escalation vulnerability. A flaw exists in the UNIX symbolic link that could allow an attacker to execute to escalate from the mail user to root.

Solution

Upgrade to Exim 4.93 or later.

See Also

http://www.nessus.org/u?f294b9cf

http://www.nessus.org/u?cc28c77b

http://www.nessus.org/u?728dbb7f

Plugin Details

Severity: High

ID: 135311

File Name: exim_4_93.nasl

Version: 1.4

Type: remote

Published: 4/10/2020

Updated: 6/3/2021

Dependencies: smtpserver_detect.nasl

Configuration: Enable paranoid mode

Risk Information

CVSS Score Source: CVE-2020-8015

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

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

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:exim:exim

Required KB Items: Settings/ParanoidReport

Exploit Ease: No known exploits are available

Patch Publication Date: 4/10/2020

Vulnerability Publication Date: 4/1/2020

Reference Information

CVE: CVE-2020-8015

IAVA: 2020-A-0131-S