CVE-2019-9854
What it is
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-2019-9852, to avoid a directory traversal attack where scripts in arbitrary locations on the file system could be executed by employing a URL encoding attack to defeat the path verification step. However this protection could be bypassed by taking advantage of a flaw in how LibreOffice assembled the final script URL location directly from components of the passed in path as opposed to solely from the sanitized output of the path verification step. This issue affects: Document Foundation LibreOffice 6.2 versions prior to 6.2.7; 6.3 versions prior to 6.3.1.
At a glance
- Exploitability
- Can be exploited locally on the machine without logging in, but needs a user to act. High risk of data exposure, data tampering, service disruption.
- Exploit odds
- 1.8% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 1.8% in the next 30 days (EPSS).
- Severity: 7.8 HIGH (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 1.8% · EPSS, next 30 days
- Weakness
- CWE-22 · Path traversal
- Record status
- Modified
Affected
- Libreoffice < 6.2.7
- Libreoffice < 6.3.1
- Canonical Ubuntu Linux 16.04
- Canonical Ubuntu Linux 18.04
- Canonical Ubuntu Linux 19.04
- Debian Linux 8.0
- Debian Linux 9.0
- Debian Linux 10.0
Attack profile CVSS 3.1 · 7.8
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Raw vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2019-9854.md and follow it. Check whether this project is affected by CVE-2019-9854. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://www.libreoffice.org/about-us/security/advisories/CVE-2019-9854/
- https://www.libreoffice.org/about-us/security/advisories/CVE-2019-9854/
References
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00067.html
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00055.html
- https://lists.debian.org/debian-lts-announce/2019/10/msg00005.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XQKKOIY2DMZCXJINOLIQXD2NWISDKK3N/
- https://seclists.org/bugtraq/2019/Sep/17
- https://usn.ubuntu.com/4138-1/
- https://www.debian.org/security/2019/dsa-4519
- https://www.libreoffice.org/about-us/security/advisories/CVE-2019-9854/
- https://bugzilla.redhat.com/show_bug.cgi?id=1769907
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00067.html
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00055.html
- https://lists.debian.org/debian-lts-announce/2019/10/msg00005.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XQKKOIY2DMZCXJINOLIQXD2NWISDKK3N/
- https://seclists.org/bugtraq/2019/Sep/17
- https://usn.ubuntu.com/4138-1/
- https://www.debian.org/security/2019/dsa-4519
- https://www.libreoffice.org/about-us/security/advisories/CVE-2019-9854/