// For flags

CVE-2018-20251

 

Severity Score

5.5
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

In WinRAR versions prior to and including 5.61, there is path traversal vulnerability when crafting the filename field of the ACE format. The UNACE module (UNACEV2.dll) creates files and folders as written in the filename field even when WinRAR validator noticed the traversal attempt and requestd to abort the extraction process. the operation is cancelled only after the folders and files were created but prior to them being written, therefore allowing the attacker to create empty files and folders everywhere in the file system.

En WinRAR, en versiones anteriores e incluyendo a la 5.61, hay una vulnerabilidad de salto de directorio al manipular el campo "filename" del formato ACE. El módulo UNACE (UNACEV2.dll) crea archivos y carpetas tal y como están escritos en el campo "filename", incluso cuando el validador de WinRAR descubría el intento de salto y solicitaba abortar el proceso de extracción. La operación se cancelaba solo tras crear las carpetas y archivos, pero antes de que se escribiesen, permitiendo así que el atacante cree archivos y carpetas vacíos en cualquier lugar del sistema de archivos.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
None
Integrity
Partial
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2018-12-19 CVE Reserved
  • 2019-02-05 CVE Published
  • 2024-06-28 EPSS Updated
  • 2024-09-16 CVE Updated
  • 2024-09-16 First Exploit
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
  • CWE-693: Protection Mechanism Failure
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Rarlab
Search vendor "Rarlab"
Winrar
Search vendor "Rarlab" for product "Winrar"
<= 5.61
Search vendor "Rarlab" for product "Winrar" and version " <= 5.61"
-
Affected