Vulnerability · Published May 3, 2021 · Assigned by Document Fdn.
CVE-2021-25631denylist of executable filename extensions possible to bypass under windows
High 8.8
In plain English
A high-severity security flaw in LibreOffice from The Document Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 5.0% (higher than 92% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)8.8High
Exploit odds (30 days)5.0%top 7.7% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | libreoffice | 7.2.2.2-r0 | ALPINE-CVE-2021-25631 |
| Alpine:v3.21 | libreoffice | 7.2.2.2-r0 | ALPINE-CVE-2021-25631 |
| Alpine:v3.22 | libreoffice | 7.2.2.2-r0 | ALPINE-CVE-2021-25631 |
| Alpine:v3.23 | libreoffice | 7.2.2.2-r0 | ALPINE-CVE-2021-25631 |
| Alpine:v3.24 | libreoffice | 7.2.2.2-r0 | ALPINE-CVE-2021-25631 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| The Document Foundation | LibreOffice | 7.1 – before 7.1.27.0 – before 7.0.5 |
Weakness: CWE-184
References
- https://positive.security/blog/url-open-rce#open-libreoffice x_refsource_MISC
- https://www.libreoffice.org/about-us/security/advisories/cve-2021-25631/ x_refsource_MISC