ProFTPD up to 1.3.6a/1.3.7rc1 Command main.c infinite loop

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.

A vulnerability was found in ProFTPD up to 1.3.6a/1.3.7rc1 (File Transfer Software). It has been rated as problematic. Affected by this issue is an unknown part of the file main.c of the component Command Handler. The manipulation with an unknown input leads to a infinite loop vulnerability. Using CWE to declare the problem leads to CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. Impacted is availability. CVE summarizes:

ProFTPD before 1.3.6b and 1.3.7rc before 1.3.7rc2 allows remote unauthenticated denial-of-service due to incorrect handling of overly long commands because main.c in a child process enters an infinite loop.

The weakness was disclosed 10/21/2019. This vulnerability is handled as CVE-2019-18217 since 10/21/2019. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1499.

Upgrading to version 1.3.6b or 1.3.7rc2 eliminates this vulnerability.

The entry VDB-138380 is pretty similar.






CPE 2.3info

CPE 2.2info


VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍


VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍



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

NVD Base Score: 🔍


Class: Infinite loop
CWE: CWE-835 / CWE-404

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Threat Intelligenceinfo

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


Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: ProFTPD 1.3.6b/1.3.7rc2


10/21/2019 🔍
10/21/2019 +0 days 🔍
10/21/2019 +0 days 🔍
01/17/2024 +1549 days 🔍


Advisory: ssa-940889
Status: Not defined

CVE: CVE-2019-18217 (🔍)
See also: 🔍


Created: 10/21/2019 08:03 AM
Updated: 01/17/2024 10:01 AM
Changes: 10/21/2019 08:03 AM (37), 10/21/2019 08:08 AM (18), 01/17/2024 09:58 AM (5), 01/17/2024 10:01 AM (1)
Complete: 🔍
Cache ID: 44:628:40


No comments yet. Languages: en.

Please log in to comment.

Do you need the next level of professionalism?

Upgrade your account now!