Postfix up to 2.6 File Descriptors input validation

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
3.6$0-$5k0.00

Summaryinfo

A vulnerability was found in Postfix up to 2.6. It has been classified as problematic. Affected is an unknown function of the component File Descriptors. The manipulation leads to input validation. This vulnerability is documented as CVE-2008-3889. Additionally, an exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Postfix up to 2.6. This issue affects an unknown code block of the component File Descriptors. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is availability. The summary by CVE is:

Postfix 2.4 before 2.4.9, 2.5 before 2.5.5, and 2.6 before 2.6-20080902, when used with the Linux 2.6 kernel, leaks epoll file descriptors during execution of "non-Postfix" commands, which allows local users to cause a denial of service (application slowdown or exit) via a crafted command, as demonstrated by a command in a .forward file.

The bug was discovered 09/03/2008. The weakness was released 09/12/2008 by Wietse Venema (Website). The advisory is shared at postfix.org. The identification of this vulnerability is CVE-2008-3889 since 09/02/2008. The exploitation is known to be easy. An attack has to be approached locally. No form of authentication is needed for a successful exploitation. Technical details are unknown but a public exploit is available.

A public exploit has been developed by Albert Sellares in ANSI C and been published 4 days after the advisory. The exploit is available at securityfocus.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 9 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 34347 (Postfix epoll File Descriptor Leak Local DoS), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SMTP problems and running in the context r.

Upgrading to version 2.4.4 eliminates this vulnerability.

The vulnerability is also documented in the databases at Exploit-DB (6472), Tenable (34347), SecurityFocus (BID 30977†), OSVDB (48108†) and Secunia (SA31716†). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.0
VulDB Meta Temp Score: 3.6

VulDB Base Score: 4.0
VulDB Temp Score: 3.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Albert Sellares
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 34347
Nessus Name: Postfix epoll File Descriptor Leak Local DoS
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 860510
OpenVAS Name: Family Connections argv[1] Parameter Remote Arbitrary Command Execution Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍

Upgrade: Postfix 2.4.4

Timelineinfo

09/02/2008 🔍
09/02/2008 +0 days 🔍
09/02/2008 +0 days 🔍
09/02/2008 +0 days 🔍
09/03/2008 +1 days 🔍
09/12/2008 +9 days 🔍
09/12/2008 +0 days 🔍
09/16/2008 +4 days 🔍
09/16/2008 +0 days 🔍
09/22/2008 +6 days 🔍
10/06/2008 +14 days 🔍
03/17/2015 +2353 days 🔍
11/04/2024 +3520 days 🔍

Sourcesinfo

Advisory: postfix.org
Researcher: Wietse Venema
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2008-3889 (🔍)
GCVE (CVE): GCVE-0-2008-3889
GCVE (VulDB): GCVE-100-44021

OVAL: 🔍

X-Force: 44865
SecurityFocus: 30977 - Postfix 'epoll' Linux Event Handler Local Denial of Service Vulnerability
Secunia: 31716
OSVDB: 48108 - Postfix file descriptor denial of service
SecurityTracker: 1020800
Vulnerability Center: 19508 - Postfix on Linux Kernel 2.6 Allows Local DoS via a Crafted Command, Medium

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 03/17/2015 16:11
Updated: 11/04/2024 07:31
Changes: 03/17/2015 16:11 (79), 08/17/2019 10:44 (10), 08/02/2021 08:55 (3), 11/04/2024 07:31 (15)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to know what is going to be exploited?

We predict KEV entries!