CVE-2021-25631
denylist of executable filename extensions possible to bypass under windows
Severity Score
8.8
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
1
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
In the LibreOffice 7-1 series in versions prior to 7.1.2, and in the 7-0 series in versions prior to 7.0.5, the denylist can be circumvented by manipulating the link so it doesn't match the denylist but results in ShellExecute attempting to launch an executable type.
En la serie LibreOffice 7-1 en versiones anteriores a 7.1.2, y en la serie 7-0 en versiones anteriores a 7.0.5, la denylist puede ser omitida al manipular el enlace para que no coincida con la denylist pero resulte en ShellExecute intentando iniciar un tipo ejecutable.
*Credits:
Lukas Euler of Positive Security
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2021-01-19 CVE Reserved
- 2021-05-03 CVE Published
- 2024-08-18 EPSS Updated
- 2024-09-16 CVE Updated
- 2024-09-16 First Exploit
- ---------- Exploited in Wild
- ---------- KEV Due Date
CWE
- CWE-184: Incomplete List of Disallowed Inputs
CAPEC
References (2)
| URL | Tag | Source |
|---|
| URL | Date | SRC |
|---|---|---|
| https://positive.security/blog/url-open-rce#open-libreoffice | 2024-09-16 |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://www.libreoffice.org/about-us/security/advisories/cve-2021-25631 | 2021-05-12 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Libreoffice Search vendor "Libreoffice" | Libreoffice Search vendor "Libreoffice" for product "Libreoffice" | >= 7.0.0 < 7.0.5 Search vendor "Libreoffice" for product "Libreoffice" and version " >= 7.0.0 < 7.0.5" | - |
Affected
| ||||||
| Libreoffice Search vendor "Libreoffice" | Libreoffice Search vendor "Libreoffice" for product "Libreoffice" | >= 7.1.0 < 7.1.2 Search vendor "Libreoffice" for product "Libreoffice" and version " >= 7.1.0 < 7.1.2" | - |
Affected
| ||||||