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7.3	$0-$5k	0.00

A vulnerability, which was classified as critical, was found in ProFTPD up to 1.3.5a/1.3.6rc1 (File Transfer Software). Affected is an unknown code of the file mod_tls.c of the component mod_tls. The manipulation with an unknown input leads to a 7pk security vulnerability. CWE is classifying the issue as CWE-254. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

The mod_tls module in ProFTPD before 1.3.5b and 1.3.6 before 1.3.6rc2 does not properly handle the TLSDHParamFile directive, which might cause a weaker than intended Diffie-Hellman (DH) key to be used and consequently allow attackers to have unspecified impact via unknown vectors.

The weakness was shared 04/05/2016 (Website). The advisory is shared for download at bugs.proftpd.org. This vulnerability is traded as CVE-2016-3125 since 03/11/2016. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1211.

The vulnerability scanner Nessus provides a plugin with the ID 90042 (Fedora 23 : proftpd-1.3.5b-1.fc23 (2016-977d57cf2d)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 27385 (ProFTPD TLSDHParam File Weak Diffie-Hellman Exchange Vulnerability).

Upgrading to version 1.3.5b or 1.3.6rc2 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published before and not just after the disclosure of the vulnerability. The vulnerability will be addressed with the following lines of code:

if (use_pkeylen) {
   keylen = pkeylen;

The vulnerability is also documented in the databases at Tenable (90042), SecurityFocus (BID 84327†) and Vulnerability Center (SBV-57940†). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• File Transfer Software

Name

• ProFTPD

Version

• 1.3.5a
• 1.3.6rc1

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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: 🔍

Exploitinginfo

Class: 7pk security
CWE: CWE-254
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 90042
Nessus Name: Fedora 23 : proftpd-1.3.5b-1.fc23 (2016-977d57cf2d)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 867773
OpenVAS Name: Fedora Update for proftpd FEDORA-2016-977
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: ProFTPD 1.3.5b/1.3.6rc2
Patch: github.com

Timelineinfo

03/11/2016 🔍
03/11/2016 +0 days 🔍
03/20/2016 +9 days 🔍
03/21/2016 +1 days 🔍
04/05/2016 +14 days 🔍
04/05/2016 +0 days 🔍
04/05/2016 +0 days 🔍
04/06/2016 +1 days 🔍
04/06/2016 +0 days 🔍
10/09/2024 +3108 days 🔍

Sourcesinfo

Advisory: FEDORA-2016-977d57cf2d
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-3125 (🔍)
GCVE (CVE): GCVE-0-2016-3125
GCVE (VulDB): GCVE-100-81624
SecurityFocus: 84327 - ProFTPD CVE-2016-3125 Diffie Hellman Key Exchange Security Bypass Vulnerability
Vulnerability Center: 57940 - ProFTPD Remote Unspecified Vulnerability due to Issue in TLSDHParamFile, Medium

Entryinfo

Created: 04/06/2016 12:21 PM
Updated: 10/09/2024 02:14 AM
Changes: 04/06/2016 12:21 PM (72), 02/03/2019 10:49 AM (12), 07/12/2022 09:23 AM (4), 10/09/2024 02:14 AM (16)
Complete: 🔍
Cache ID: 18:DDD:40

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