Executive Summary

Summary
Title Postfix: Denial of Service
Informations
Name GLSA-200809-09 First vendor Publication 2008-09-19
Vendor Gentoo Last vendor Modification 2008-09-19
Severity (Vendor) Normal Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:L/Au:N/C:N/I:N/A:P)
Cvss Base Score 2.1 Attack Range Local
Cvss Impact Score 2.9 Attack Complexity Low
Cvss Expoit Score 3.9 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Synopsis

A memory leak in Postfix might allow local users to cause a Denial of Service.

Background

Postfix is Wietse Venema's mailer that attempts to be fast, easy to administer, and secure, as an alternative to the widely-used Sendmail program.

Description

It has been discovered than Postfix leaks an epoll file descriptor when executing external commands, e.g. user-controlled $HOME/.forward or
$HOME/.procmailrc files. NOTE: This vulnerability only concerns Postfix instances running on Linux 2.6 kernels.

Impact

A local attacker could exploit this vulnerability to reduce the performance of Postfix, and possibly trigger an assertion, resulting in a Denial of Service.

Workaround

Allow only trusted users to control delivery to non-Postfix commands.

Resolution

All Postfix 2.4 users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=mail-mta/postfix-2.4.9"

All Postfix 2.5 users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=mail-mta/postfix-2.5.5"

References

[ 1 ] CVE-2008-3889 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3889

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-200809-09.xml

Original Source

Url : http://security.gentoo.org/glsa/glsa-200809-09.xml

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-20 Improper Input Validation

OVAL Definitions

Definition Id: oval:org.mitre.oval:def:17477
 
Oval ID: oval:org.mitre.oval:def:17477
Title: USN-642-1 -- postfix vulnerabilities
Description: Wietse Venema discovered that Postfix leaked internal file descriptors when executing non-Postfix commands.
Family: unix Class: patch
Reference(s): USN-642-1
CVE-2008-3889
Version: 7
Platform(s): Ubuntu 7.10
Ubuntu 8.04
Product(s): postfix
Definition Synopsis:

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 14

ExploitDB Exploits

id Description
2008-09-16 Postfix < 2.4.9, 2.5.5, 2.6-20080902 - (.forward) Local DoS Exploit

OpenVAS Exploits

Date Description
2009-04-09 Name : Mandriva Update for postfix MDVSA-2008:190 (postfix)
File : nvt/gb_mandriva_MDVSA_2008_190.nasl
2009-03-23 Name : Ubuntu Update for postfix vulnerabilities USN-642-1
File : nvt/gb_ubuntu_USN_642_1.nasl
2009-02-17 Name : Fedora Update for postfix FEDORA-2008-8593
File : nvt/gb_fedora_2008_8593_postfix_fc9.nasl
2009-02-17 Name : Fedora Update for postfix FEDORA-2008-8595
File : nvt/gb_fedora_2008_8595_postfix_fc8.nasl
2008-09-24 Name : Gentoo Security Advisory GLSA 200809-09 (postfix)
File : nvt/glsa_200809_09.nasl

Open Source Vulnerability Database (OSVDB)

Id Description
48108 Postfix epoll File Descriptor Leak Local DoS

Nessus® Vulnerability Scanner

Date Description
2009-07-21 Name : The remote openSUSE host is missing a security update.
File : suse_11_0_postfix-080912.nasl - Type : ACT_GATHER_INFO
2009-04-23 Name : The remote Mandriva Linux host is missing one or more security updates.
File : mandriva_MDVSA-2008-190.nasl - Type : ACT_GATHER_INFO
2009-04-23 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-642-1.nasl - Type : ACT_GATHER_INFO
2008-10-10 Name : The remote Fedora host is missing a security update.
File : fedora_2008-8593.nasl - Type : ACT_GATHER_INFO
2008-10-10 Name : The remote Fedora host is missing a security update.
File : fedora_2008-8595.nasl - Type : ACT_GATHER_INFO
2008-10-06 Name : The remote mail server is vulnerable to a local denial of service attack.
File : postfix_epoll_local_DoS.nasl - Type : ACT_GATHER_INFO
2008-09-22 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-200809-09.nasl - Type : ACT_GATHER_INFO
2008-09-18 Name : The remote openSUSE host is missing a security update.
File : suse_postfix-5603.nasl - Type : ACT_GATHER_INFO

Alert History

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Date Informations
2014-02-17 11:36:04
  • Multiple Updates