postfix 2.5.5 link following

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.
8.4$5k-$25k0.00

Summaryinfo

A vulnerability classified as problematic has been found in postfix 2.5.5. The affected element is an unknown function. Performing a manipulation results in link following. This vulnerability was named CVE-2009-2939. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as critical, was found in postfix 2.5.5. This affects some unknown processing. The manipulation with an unknown input leads to a link following vulnerability. CWE is classifying the issue as CWE-59. The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

The postfix.postinst script in the Debian GNU/Linux and Ubuntu postfix 2.5.5 package grants the postfix user write access to /var/spool/postfix/pid, which might allow local users to conduct symlink attacks that overwrite arbitrary files.

The weakness was presented 09/21/2009 by Wietse Venema (oss-sec). The advisory is shared at openwall.com. This vulnerability is uniquely identified as CVE-2009-2939. An attack has to be approached locally. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 08/23/2021).

The vulnerability scanner Nessus provides a plugin with the ID 53860 (Debian DSA-2233-1 : postfix - several vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (53860), SecurityFocus (BID 36469†) and Vulnerability Center (SBV-31374†). 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: 8.4
VulDB Meta Temp Score: 8.4

VulDB Base Score: 8.4
VulDB Temp Score: 8.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

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

NVD Base Score: 🔍

Exploitinginfo

Class: Link following
CWE: CWE-59
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 53860
Nessus Name: Debian DSA-2233-1 : postfix - several vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 69733
OpenVAS Name: Debian Security Advisory DSA 2233-1 (postfix)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

08/23/2009 🔍
09/21/2009 +29 days 🔍
09/21/2009 +0 days 🔍
09/21/2009 +0 days 🔍
09/21/2009 +0 days 🔍
05/09/2011 +595 days 🔍
05/11/2011 +2 days 🔍
03/18/2015 +1407 days 🔍
08/23/2021 +2349 days 🔍

Sourcesinfo

Advisory: openwall.com
Researcher: Wietse Venema
Status: Not defined

CVE: CVE-2009-2939 (🔍)
GCVE (CVE): GCVE-0-2009-2939
GCVE (VulDB): GCVE-100-50133

OVAL: 🔍

SecurityFocus: 36469 - Debian and Ubuntu Postfix Insecure Temporary File Creation Vulnerability
Vulnerability Center: 31374 - Debian GNU/Linux and Ubuntu postfix 2.5.5 Local Arbitrary Files Overwrite Vulnerability, Medium

Entryinfo

Created: 03/18/2015 15:15
Updated: 08/23/2021 01:14
Changes: 03/18/2015 15:15 (55), 03/22/2017 09:41 (10), 08/23/2021 01:07 (3), 08/23/2021 01:14 (1)
Complete: 🔍
Cache ID: 216:37A: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 ▸

Might our Artificial Intelligence support you?

Check our Alexa App!