CVE-2021-25276

Severity Score

7.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

En SolarWinds Serv-U versiones anteriores a 15.2.2 Hotfix 1, se presenta un directorio que contiene archivos de perfil de usuario (que incluyen hash de contraseña de usuario) que se puede leer y escribir por todo el mundo. Un usuario no privilegiado de Windows (que tenga acceso al sistema de archivos del servidor) puede agregar un usuario FTP al copiar un archivo de perfil válido en este directorio. Por ejemplo, si este perfil configura a un usuario con un directorio C:\ home, el atacante obtiene acceso para leer o reemplazar archivos arbitrarios con privilegios LocalSystem

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-01-15 CVE Reserved
2021-02-03 CVE Published
2024-06-08 EPSS Updated
2024-08-03 CVE Updated
2024-08-03 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-732: Incorrect Permission Assignment for Critical Resource

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC
https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/full-system-control-with-new-solarwinds-orion-based-and-serv-u-ftp-vulnerabilities	2024-08-03

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Solarwinds Search vendor "Solarwinds"		Serv-u Search vendor "Solarwinds" for product "Serv-u"				< 15.2.2 Search vendor "Solarwinds" for product "Serv-u" and version " < 15.2.2"		-		Affected
Solarwinds Search vendor "Solarwinds"		Serv-u Search vendor "Solarwinds" for product "Serv-u"				15.2.2 Search vendor "Solarwinds" for product "Serv-u" and version "15.2.2"		-		Affected