SolarWinds Serv-U Insecure Direct Object Reference (IDOR) Remote Code Execution Vulnerability

An Insecure Direct Object Reference (IDOR) vulnerability exists in Serv-U, which when exploited, gives a malicious actor the ability to execute native code as a privileged account. This issue requires administrative privileges to abuse. On Windows deployments, the risk is scored as a medium because services frequently run under less-privileged service accounts by default.

SolarWinds Serv-U Exposure of Sensitive Information Vulnerability

SolarWinds Serv-U is submitting an HTTP request when changing or updating the attributes for File Share or File request.  Part of the URL of the request discloses sensitive data.

Cross-Site Scripting Vulnerability in Serv-U Web Client

This vulnerability happens in the web client versions 15.3.0 to Serv-U 15.3.1. This vulnerability affects the directory creation function.

SolarWinds Serv-U Client-Side Cross-Site Scripting Vulnerability

SolarWinds Serv-U is vulnerable to a client-side cross-site scripting (XSS) vulnerability. The vulnerability can only be performed by an authenticated account, on the local machine, from the local browser session. Therefore the risk is very low.

Serv-U Remote Memory Escape Vulnerability

Microsoft discovered a remote code execution (RCE) vulnerability in the SolarWinds Serv-U product utilizing a Remote Memory Escape Vulnerability. If exploited, a threat actor may be able to gain privileged access to the machine hosting Serv-U Only. SolarWinds Serv-U Managed File Transfer and Serv-U Secure FTP for Windows before 15.2.3 HF2 are affected by this vulnerability.

Improper Input Validation Vulnerability in Serv-U

Serv-U web login screen to LDAP authentication was allowing characters that were not sufficiently sanitized. SolarWinds has updated the input mechanism to perform additional validation and sanitization. Please Note: No downstream affect has been detected as the LDAP servers ignored improper characters. To insure proper input validation is completed in all environments. SolarWinds recommends scheduling an update to the latest version of Serv-U.

Common Key Vulnerability in Serv-U FTP Server

Common encryption key appears to be used across all deployed instances of Serv-U FTP Server. Because of this an encrypted value that is exposed to an attacker can be simply recovered to plaintext.

Directory traversal vulnerability in Serv-U before 9.2.0.1 allows remote authenticated users to read arbitrary files via unspecified vectors.

Directory traversal vulnerability in Serv-U FTP Server before 11.1.0.5 allows remote authenticated users to read and write arbitrary files, and list and create arbitrary directories, via a "..:/" (dot dot colon forward slash) in the (1) list, (2) put, or (3) get commands.

2FA/MFA Bypass Vulnerability in Serv-U 15.4 and 15.4 Hotfix 1

A vulnerability has been identified within Serv-U 15.4 and 15.4 Hotfix 1 that, if exploited, allows an actor to bypass multi-factor/two-factor authentication. The actor must have administrator-level access to Serv-U to perform this action. 15.4.  SolarWinds found that the issue was not completely fixed in 15.4 Hotfix 1. 

Arbitrary File Overwrite Vulnerability

A highly privileged account can overwrite arbitrary files on the system with log output. The log file path tags were not sanitized properly.

SolarWinds Serv-U Directory Traversal Remote Code Execution Vulnerability

SolarWinds Serv-U was found to be susceptible to a Directory Traversal Remote Code Vulnerability. This vulnerability requires a highly privileged account to be exploited.

HTML injection Vulnerability in Serv-U 15.4

A vulnerability has been identified within Serv-U 15.4 that allows an authenticated actor to insert content on the file share function feature of Serv-U, which could be used maliciously.

2FA/MFA Bypass Vulnerability in Serv-U 15.4

A vulnerability has been identified within Serv-U 15.4 that, if exploited, allows an actor to bypass multi-factor/two-factor authentication. The actor must have administrator-level access to Serv-U to perform this action. 

An issue was discovered in SolarWinds Serv-U before 15.2.2. Unauthenticated attackers can retrieve cleartext passwords via macro Injection. NOTE: this had a distinct fix relative to CVE-2020-35481.

Directory Transversal Vulnerability in Serv-U 15.3

A researcher reported a Directory Transversal Vulnerability in Serv-U 15.3. This may allow access to files relating to the Serv-U installation and server files. This issue has been resolved in Serv-U 15.3 Hotfix 1.

Domain Admin Broken Access Control

This broken access control vulnerability pertains specifically to a domain admin who can access configuration & user data of other domains which they should not have access to. Please note the admin is unable to modify the data (read only operation). This UAC issue leads to a data leak to unauthorized users for a domain, with no log of them accessing the data unless they attempt to modify it. This read-only activity is logged to the original domain and does not specify which domain was accessed.

Broken Access Control Vulnerability for SolarWinds Serv-U

When a user has admin rights in Serv-U Console, the user can move, create and delete any files are able to be accessed on the Serv-U host machine.

A valid CSRF token is present in response to an invalid request

Serv-U server responds with valid CSRFToken when the request contains only Session.

Execute Command Function Allows Remote Code Execution (RCE)Vulnerability

The Serv-U File Server allows for events such as user login failures to be audited by executing a command. This command can be supplied with parameters that can take the form of user string variables, allowing remote code execution.