Beasts vsftpd up to 0.0.13 ls.c vsf_filename_passes_filter resource management
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
3.9 | $0-$5k | 0.00 |
A vulnerability was found in Beasts vsftpd up to 0.0.13 (File Transfer Software). It has been rated as problematic. Affected by this issue is the function vsf_filename_passes_filter
of the file ls.c. The manipulation with an unknown input leads to a resource management vulnerability. Using CWE to declare the problem leads to CWE-399. Impacted is availability. CVE summarizes:
The vsf_filename_passes_filter function in ls.c in vsftpd before 2.3.3 allows remote authenticated users to cause a denial of service (CPU consumption and process slot exhaustion) via crafted glob expressions in STAT commands in multiple FTP sessions, a different vulnerability than CVE-2010-2632.
The weakness was published 03/02/2011 by Maksymilian Arciemowicz as confirmed advisory (CERT.org). The advisory is available at kb.cert.org. This vulnerability is handled as CVE-2011-0762 since 02/03/2011. The exploitation is known to be easy. The attack may be launched remotely. A simple authentication is needed for exploitation. Technical details as well as a public exploit are known.
A public exploit has been developed by Maksymilian Arciemowicz in ANSI C and been published immediately after the advisory. The exploit is available at securityfocus.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 68226 (Oracle Linux 4 / 5 / 6 : vsftpd (ELSA-2011-0337)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks.
Upgrading to version 0.0.14 eliminates this vulnerability. Attack attempts may be identified with Snort ID 1379.
The vulnerability is also documented in the databases at X-Force (65873), Tenable (68226) and Exploit-DB (16270).
Product
Type
Vendor
Name
Version
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 4.3VulDB Meta Temp Score: 3.9
VulDB Base Score: 4.3
VulDB Temp Score: 3.9
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv2
AV | AC | Au | C | I | A |
---|---|---|---|---|---|
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
---|---|---|---|---|---|
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
NVD Base Score: 🔍
Exploiting
Class: Resource managementCWE: CWE-399 / CWE-404
ATT&CK: Unknown
Local: No
Remote: Yes
Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Maksymilian Arciemowicz
Programming Language: 🔍
Download: 🔍
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
---|---|---|---|---|
Today | unlock | unlock | unlock | unlock |
Nessus ID: 68226
Nessus Name: Oracle Linux 4 / 5 / 6 : vsftpd (ELSA-2011-0337)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍
OpenVAS ID: 70399
OpenVAS Name: Debian Security Advisory DSA 2305-1 (vsftpd)
OpenVAS File: 🔍
OpenVAS Family: 🔍
Exploit-DB: 🔍
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
0-Day Time: 🔍
Exploit Delay Time: 🔍
Upgrade: vsftpd 0.0.14
Snort ID: 1379
Snort Message: PROTOCOL-FTP STAT overflow attempt
Snort Class: 🔍
SourceFire IPS: 🔍
Timeline
02/03/2011 🔍03/01/2011 🔍
03/01/2011 🔍
03/02/2011 🔍
03/02/2011 🔍
03/02/2011 🔍
03/02/2011 🔍
03/10/2011 🔍
03/13/2011 🔍
07/12/2013 🔍
03/20/2015 🔍
10/18/2021 🔍
Sources
Advisory: RHSA-2011:0337Researcher: Maksymilian Arciemowicz
Status: Confirmed
Confirmation: 🔍
CVE: CVE-2011-0762 (🔍)
OVAL: 🔍
X-Force: 65873
SecurityTracker: 1025186 - vsftpd vsf_filename_passes_filter() Bug Lets Remote Authenticated Users Deny Service
Vulnerability Center: 30288 - vsftpd Before 2.3.3 Remote Denial of Service Vulnerability via Crafted Glob Expressions, Medium
SecurityFocus: 46617 - vsftpd FTP Server 'ls.c' Remote Denial of Service Vulnerability
OSVDB: 73340
Vupen: ADV-2011-0547
scip Labs: https://www.scip.ch/en/?labs.20161013
Entry
Created: 03/20/2015 16:16Updated: 10/18/2021 14:46
Changes: 03/20/2015 16:16 (70), 03/18/2017 08:39 (24), 10/18/2021 14:40 (3), 10/18/2021 14:43 (1), 10/18/2021 14:46 (2)
Complete: 🔍
No comments yet. Languages: en.
Please log in to comment.