Exim string_format Function Remote Overflow

high Nessus Plugin ID 51179
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The remote service has a buffer overflow.

Description

A heap overflow vulnerability exists in the version of exim installed on the remote host.

By sending a specially crafted message to the server, a remote attacker can leverage this vulnerability to execute arbitrary code on the server with the privilege of the exim server. A separate vulnerability that Nessus didn't test for, CVE-2010-4345, is often used to elevate the exim user to root access.

Note that Nessus checked for this vulnerability by sending a specially crafted packet and checking the response, without crashing the service.

All 4.6x versions 4.69-9 and below are known to be affected, and others may be as well.

Solution

Upgrade to version 4.70 as it addresses the issue.

See Also

https://bugs.exim.org/show_bug.cgi?id=787

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=606612

https://lists.exim.org/lurker/message/20101207.215955.bb32d4f2.en.html

Plugin Details

Severity: High

ID: 51179

File Name: exim_string_vformat.nasl

Version: 1.17

Type: remote

Published: 12/15/2010

Updated: 11/15/2018

Dependencies: smtpserver_detect.nasl

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.2

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

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

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 8.2

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

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

Vulnerability Information

CPE: cpe:/a:exim:exim

Exploit Available: true

Exploit Ease: Exploits are available

Exploited by Nessus: true

Patch Publication Date: 12/8/2008

Vulnerability Publication Date: 12/10/2010

Exploitable With

CANVAS (CANVAS)

Core Impact

Metasploit (Exim4 string_format Function Heap Buffer Overflow)

Reference Information

CVE: CVE-2010-4344

BID: 45308