CVE-2019-12739

lib/Controller/ExtractionController.php in the Extract add-on before 1.2.0 for Nextcloud allows Remote Code Execution via shell metacharacters in a RAR filename via ajax/extractRar.php (nameOfFile and directory parameters).
OS Command Injection
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
9 CRITICAL
NETWORK
LOW
LOW
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
mitreCNA
9 CRITICAL
NETWORK
LOW
LOW
CVSS:3.0/AC:L/AV:N/A:H/C:H/I:H/PR:L/S:C/UI:R
CVEADP
---
---
Base Score
CVSS 3.x
EPSS Score
Percentile: 80%
VendorProductVersion
nextcloudextract
𝑥
< 1.2.0
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://hackerone.com/reports/546753
https://www.secsignal.org/news/a-tale-of-rce-nextcloud-extract-app/
https://hackerone.com/reports/546753
https://www.secsignal.org/news/a-tale-of-rce-nextcloud-extract-app/