Vulnerability Description
LibreOffice has a feature where documents can specify that pre-installed macros can be executed on various script events such as mouse-over, document-open etc. Access is intended to be restricted to scripts under the share/Scripts/python, user/Scripts/python sub-directories of the LibreOffice install. Protection was added, to address CVE-2018-16858, to avoid a directory traversal attack where scripts in arbitrary locations on the file system could be executed. However this new protection could be bypassed by a URL encoding attack. In the fixed versions, the parsed url describing the script location is correctly encoded before further processing. This issue affects: Document Foundation LibreOffice versions prior to 6.2.6.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Canonical | Ubuntu Linux | 16.04 |
| Debian | Debian Linux | 8.0 |
| Fedoraproject | Fedora | 29 |
| Opensuse | Leap | 15.0 |
| Libreoffice | Libreoffice | < 6.2.6 |
Related Weaknesses (CWE)
References
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00006.htmlMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00067.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/10/msg00005.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://seclists.org/bugtraq/2019/Aug/28Issue TrackingMailing ListThird Party Advisory
- https://seclists.org/bugtraq/2019/Sep/17Mailing ListThird Party Advisory
- https://usn.ubuntu.com/4102-1/Third Party Advisory
- https://www.debian.org/security/2019/dsa-4501Third Party Advisory
- https://www.libreoffice.org/about-us/security/advisories/CVE-2019-9852PatchVendor Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00006.htmlMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00067.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/10/msg00005.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://seclists.org/bugtraq/2019/Aug/28Issue TrackingMailing ListThird Party Advisory
- https://seclists.org/bugtraq/2019/Sep/17Mailing ListThird Party Advisory
FAQ
What is CVE-2019-9852?
CVE-2019-9852 is a vulnerability with a CVSS score of 7.8 (HIGH). LibreOffice has a feature where documents can specify that pre-installed macros can be executed on various script events such as mouse-over, document-open etc. Access is intended to be restricted to s...
How severe is CVE-2019-9852?
CVE-2019-9852 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2019-9852?
Check the references section above for vendor advisories and patch information. Affected products include: Canonical Ubuntu Linux, Debian Debian Linux, Fedoraproject Fedora, Opensuse Leap, Libreoffice Libreoffice.