Postfix up to 2.6.0 access control

CVSS Meta Temp Score
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Postfix. The impacted element is an unknown function. The manipulation leads to access control. This vulnerability is documented as CVE-2008-2936. Additionally, an exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Postfix. It has been rated as critical. This issue affects some unknown processing. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-264. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Postfix before 2.3.15, 2.4 before 2.4.8, 2.5 before 2.5.4, and 2.6 before 2.6-20080814, when the operating system supports hard links to symlinks, allows local users to append e-mail messages to a file to which a root-owned symlink points, by creating a hard link to this symlink and then sending a message. NOTE: this can be leveraged to gain privileges if there is a symlink to an init script.

The bug was discovered 08/14/2008. The weakness was released 08/18/2008 by Sebastian Krahmer as confirmed advisory (CERT.org). The advisory is shared at kb.cert.org. The identification of this vulnerability is CVE-2008-2936 since 06/30/2008. The exploitation is known to be difficult. 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. MITRE ATT&CK project uses the attack technique T1068 for this issue.

A public exploit has been developed by RoMaNSoFt in Shell File and been published 2 weeks after the advisory. The exploit is available at securityfocus.com. It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 67738 (Oracle Linux 3 / 4 / 5 : postfix (ELSA-2008-0839)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 165696 (SUSE Enterprise Linux Security Update Postfix (SUSE-SA:2008:040)).

Upgrading to version 2.3.13 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (44460), Exploit-DB (6337), Tenable (67738), SecurityFocus (BID 30691†) and OSVDB (47658†). Entry connected to this vulnerability is available at VDB-43722. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 6.7

VulDB Base Score: 7.4
VulDB Temp Score: 6.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

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

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 67738
Nessus Name: Oracle Linux 3 / 4 / 5 : postfix (ELSA-2008-0839)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 61434
OpenVAS Name: Debian Security Advisory DSA 1629-1 (postfix)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍

Upgrade: Postfix 2.3.13

Timelineinfo

06/30/2008 🔍
08/14/2008 +45 days 🔍
08/14/2008 +0 days 🔍
08/14/2008 +0 days 🔍
08/14/2008 +0 days 🔍
08/14/2008 +0 days 🔍
08/14/2008 +0 days 🔍
08/18/2008 +4 days 🔍
08/18/2008 +0 days 🔍
08/18/2008 +0 days 🔍
08/31/2008 +13 days 🔍
08/31/2008 +0 days 🔍
07/12/2013 +1776 days 🔍
03/17/2015 +613 days 🔍
12/30/2024 +3576 days 🔍

Sourcesinfo

Advisory: kb.cert.org
Researcher: Sebastian Krahmer
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2008-2936 (🔍)
GCVE (CVE): GCVE-0-2008-2936
GCVE (VulDB): GCVE-100-43721

OVAL: 🔍

CERT: 🔍
X-Force: 44460
SecurityFocus: 30691 - Postfix Local Information Disclosure and Local Privilege Escalation Vulnerabilities
Secunia: 31485 - Postfix Symlink Handling and Destination Ownership Security Issues, Less Critical
OSVDB: 47658 - CVE-2008-2936 - Postfix - File Modification Issue
SecurityTracker: 1020700
Vulnerability Center: 19187 - Postfix Handling Symlink Files Vulnerability Allows Arbitrary Code Execution with Root Privileges, Medium
Vupen: ADV-2008-2385

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

Entryinfo

Created: 03/17/2015 12:19
Updated: 12/30/2024 02:13
Changes: 03/17/2015 12:19 (94), 08/15/2019 18:13 (4), 11/03/2024 17:13 (17), 12/30/2024 02:13 (1)
Complete: 🔍
Cache ID: 216:A03:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

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