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Vulnerability Details : CVE-2018-20250

In WinRAR versions prior to and including 5.61, There is path traversal vulnerability when crafting the filename field of the ACE format (in UNACEV2.dll). When the filename field is manipulated with specific patterns, the destination (extraction) folder is ignored, thus treating the filename as an absolute path.
Publish Date : 2019-02-05 Last Update Date : 2019-10-09
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- CVSS Scores & Vulnerability Types

CVSS Score
6.8
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Directory traversal
CWE ID 22

- Products Affected By CVE-2018-20250

# Product Type Vendor Product Version Update Edition Language
1 Application Rarlab Winrar 5.61 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Rarlab Winrar 1

- References For CVE-2018-20250

https://www.win-rar.com/whatsnew.html
https://research.checkpoint.com/extracting-code-execution-from-winrar/
https://www.exploit-db.com/exploits/46552/
EXPLOIT-DB 46552
https://github.com/blau72/CVE-2018-20250-WinRAR-ACE
http://www.rapid7.com/db/modules/exploit/windows/fileformat/winrar_ace
http://www.securityfocus.com/bid/106948
BID 106948 WinRAR Multiple Security Vulnerabilities Release Date:2019-02-25
http://packetstormsecurity.com/files/152618/RARLAB-WinRAR-ACE-Format-Input-Validation-Remote-Code-Execution.html
https://www.exploit-db.com/exploits/46756/
EXPLOIT-DB 46756

- Metasploit Modules Related To CVE-2018-20250

RARLAB WinRAR ACE Format Input Validation Remote Code Execution
In WinRAR versions prior to and including 5.61, there is path traversal vulnerability when crafting the filename field of the ACE format (in UNACEV2.dll). When the filename field is manipulated with specific patterns, the destination (extraction) folder is ignored, thus treating the filename as an absolute path. This module will attempt to extract a payload to the startup folder of the current user. It is limited such that we can only go back one folder. Therefore, for this exploit to work properly, the user must extract the supplied RAR file from one folder within the user profile folder (e.g. Desktop or Downloads). User restart is required to gain a shell.
Module type : exploit Rank : excellent Platforms : Windows


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