ProFTPD up to 1.3.5d/1.3.6rc4 link following

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in ProFTPD up to 1.3.5d/1.3.6rc4. Affected is an unknown function. Such manipulation leads to link following. This vulnerability is documented as CVE-2017-7418. The attack needs to be performed locally. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in ProFTPD up to 1.3.5d/1.3.6rc4 (File Transfer Software). It has been rated as critical. Affected by this issue is an unknown functionality. The manipulation with an unknown input leads to a link following vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. CVE summarizes:

ProFTPD before 1.3.5e and 1.3.6 before 1.3.6rc5 controls whether the home directory of a user could contain a symbolic link through the AllowChrootSymlinks configuration option, but checks only the last path component when enforcing AllowChrootSymlinks. Attackers with local access could bypass the AllowChrootSymlinks control by replacing a path component (other than the last one) with a symbolic link. The threat model includes an attacker who is not granted full filesystem access by a hosting provider, but can reconfigure the home directory of an FTP user.

The bug was discovered 04/10/2017. The weakness was released 04/04/2017 (Website). The advisory is shared for download at bugs.proftpd.org. This vulnerability is handled as CVE-2017-7418 since 04/04/2017. The attack needs to be approached locally. The successful exploitation needs a simple authentication. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 99493 (Fedora 25 : proftpd (2017-c6f424c3ff)), 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 169937 (OpenSUSE Security Update for proftpd (openSUSE-SU-2017:1035-1)).

Upgrading to version 1.3.5e or 1.3.6rc5 eliminates this vulnerability. A possible mitigation has been published 3 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (99493) and SecurityFocus (BID 97409†). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

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

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: 🔍

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Nessus ID: 99493
Nessus Name: Fedora 25 : proftpd (2017-c6f424c3ff)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 867773
OpenVAS Name: Fedora Update for proftpd FEDORA-2017-e15e37b689
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: ProFTPD 1.3.5e/1.3.6rc5
Patch: github.com

Timelineinfo

04/04/2017 🔍
04/04/2017 +0 days 🔍
04/04/2017 +0 days 🔍
04/04/2017 +0 days 🔍
04/04/2017 +0 days 🔍
04/10/2017 +6 days 🔍
04/19/2017 +9 days 🔍
04/20/2017 +1 days 🔍
08/24/2024 +2683 days 🔍

Sourcesinfo

Product: github.com

Advisory: FEDORA-2017-c6f424c3ff
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-7418 (🔍)
GCVE (CVE): GCVE-0-2017-7418
GCVE (VulDB): GCVE-100-99296
SecurityFocus: 97409 - ProFTPD CVE-2017-7418 Local Security Bypass Vulnerability
OSVDB: - CVE-2017-7418 - ProFTPD - Security Bypass Issue

Entryinfo

Created: 04/04/2017 22:27
Updated: 08/24/2024 04:08
Changes: 04/04/2017 22:27 (71), 08/25/2020 17:19 (6), 11/27/2022 08:08 (5), 11/27/2022 08:13 (1), 11/27/2022 08:15 (1), 08/24/2024 04:08 (16)
Complete: 🔍
Cache ID: 216::103

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