SolarWinds Serv-U up to 15.2.1 on Windows Home Directory permission

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6.0$0-$5k0.00

A vulnerability was found in SolarWinds Serv-U up to 15.2.1 on Windows (File Transfer Software) and classified as critical. Affected by this issue is some unknown functionality of the component Home Directory Handler. The manipulation with an unknown input leads to a privilege escalation vulnerability. Using CWE to declare the problem leads to CWE-275. Impacted is confidentiality, integrity, and availability. CVE summarizes:

In SolarWinds Serv-U before 15.2.2 Hotfix 1, there is a directory containing user profile files (that include users' password hashes) that is world readable and writable. An unprivileged Windows user (having access to the server's filesystem) can add an FTP user by copying a valid profile file to this directory. For example, if this profile sets up a user with a C:\ home directory, then the attacker obtains access to read or replace arbitrary files with LocalSystem privileges.

The weakness was presented 02/04/2021. The advisory is available at trustwave.com. This vulnerability is handled as CVE-2021-25276 since 01/15/2021. The exploitation is known to be easy. The attack may be launched remotely. A simple authentication is required for exploitation. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1222 by the MITRE ATT&CK project.

Applying the patch 15.2.2 Hotfix 1 is able to eliminate this problem.

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VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

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

Exploitinginfoedit

Class: Privilege escalation
CWE: CWE-275
ATT&CK: T1222

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfoedit

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Countermeasuresinfoedit

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: 15.2.2 Hotfix 1

Timelineinfoedit

01/15/2021 CVE assigned
02/04/2021 +20 days Advisory disclosed
02/04/2021 +0 days VulDB entry created
02/23/2021 +19 days VulDB last update

Sourcesinfoedit

Vendor: https://www.solarwinds.com/

Advisory: trustwave.com
Status: Confirmed

CVE: CVE-2021-25276 (🔒)

Entryinfoedit

Created: 02/04/2021 10:49 AM
Updated: 02/23/2021 01:32 PM
Changes: (5) source_cve_assigned source_cve_nvd_summary vulnerability_cvss2_vuldb_tempscore vulnerability_cvss3_vuldb_tempscore vulnerability_cvss3_meta_tempscore
Complete: 🔍

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