FileZilla Server up to 0.9.21 malformed null pointer dereference

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.
3.9$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in FileZilla Server up to 0.9.21. The affected element is an unknown function. This manipulation of the argument malformed causes null pointer dereference. This vulnerability appears as CVE-2006-6564. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in FileZilla Server up to 0.9.21 (File Transfer Software) and classified as problematic. Affected by this vulnerability is an unknown functionality. The manipulation of the argument malformed with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. The summary by CVE is:

FileZilla Server before 0.9.22 allows remote attackers to cause a denial of service (crash) via a malformed argument to the STOR command, which results in a NULL pointer dereference. NOTE: CVE analysis suggests that the problem might be due to a malformed PORT command.

The bug was discovered 12/11/2006. The weakness was presented 12/15/2006 by rgod (Website). The advisory is shared at xforce.iss.net. This vulnerability is known as CVE-2006-6564 since 12/14/2006. The exploitation appears to be easy. The attack can be launched remotely. The successful exploitation needs a single authentication. Technical details are known, but no exploit is available.

It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 23831 (FileZilla FTP Server < 0.9.22 Wildcard Handling Remote DoS), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 27290 (FileZilla Server Null Pointer Dereference Multiple Denial of Service Vulnerabilities).

Upgrading to version 0.9.22 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (30853), Tenable (23831), SecurityFocus (BID 21542†), OSVDB (34435†) and Vulnerability Center (SBV-13371†). See VDB-33854 for similar entry. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 3.9

VulDB Base Score: 4.3
VulDB Temp Score: 3.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

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

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 23831
Nessus Name: FileZilla FTP Server < 0.9.22 Wildcard Handling Remote DoS
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Server 0.9.22
Fortigate IPS: 🔍

Timelineinfo

12/11/2006 🔍
12/11/2006 +0 days 🔍
12/11/2006 +0 days 🔍
12/12/2006 +1 days 🔍
12/14/2006 +2 days 🔍
12/15/2006 +1 days 🔍
12/15/2006 +0 days 🔍
12/18/2006 +3 days 🔍
03/12/2015 +3006 days 🔍
07/12/2019 +1583 days 🔍

Sourcesinfo

Advisory: xforce.iss.net
Researcher: rgod
Status: Not defined
Confirmation: 🔍

CVE: CVE-2006-6564 (🔍)
GCVE (CVE): GCVE-0-2006-6564
GCVE (VulDB): GCVE-100-33853
X-Force: 30853
SecurityFocus: 21542 - FileZilla Server Null Pointer Dereference Denial of Service Vulnerability
OSVDB: 34435 - FileZilla Server commands denial of service
Vulnerability Center: 13371 - FileZilla Server Multiple Denial of Service Vulnerabilities, Medium
Vupen: ADV-2006-4937

See also: 🔍

Entryinfo

Created: 03/12/2015 22:21
Updated: 07/12/2019 08:48
Changes: 03/12/2015 22:21 (72), 07/12/2019 08:48 (6)
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 ▸

Do you want to use VulDB in your project?

Use the official API to access entries easily!