CVE-2018-20251

medium
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

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.

References

http://www.securityfocus.com/bid/106948

https://research.checkpoint.com/extracting-code-execution-from-winrar/

https://www.win-rar.com/whatsnew.html

Details

Source: MITRE

Published: 2019-02-05

Updated: 2019-10-09

Type: CWE-22

Risk Information

CVSS v2

Base Score: 4.3

Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N

Impact Score: 2.9

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3

Base Score: 5.5

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Impact Score: 3.6

Exploitability Score: 1.8

Severity: MEDIUM

Vulnerable Software

Configuration 1

OR

cpe:2.3:a:rarlab:winrar:*:*:*:*:*:*:*:* versions up to 5.61 (inclusive)

Tenable Plugins

View all (1 total)

IDNameProductFamilySeverity
122448RARLAB WinRAR < 5.70 Beta 1 Multiple VulnerabilitiesNessusWindows
high