Path Traversal in Document Foundation Libreoffice
CVE-2019-9852
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.018 (77.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 77.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.019 · newest: 0.018 · change: -0.002
Affected products
- Document Foundation Libreoffice — versions unspecified
- Libreoffice
- Canonical Ubuntu Linux — versions 16.04, 18.04, 19.04
- Debian Linux — versions 8.0, 9.0, 10.0
- Fedoraproject Fedora — versions 29
- openSUSE Leap — versions 15.0, 15.1
Weakness classification (CWE)
References
- www.libreoffice.org/about-us/security/advisories/CVE-2019-9852 (Patch, Vendor Advisory)
- seclists.org/bugtraq/2019/Aug/28 (mailing-list, Mailing List, Third Party Advisory, Issue Tracking)
- www.debian.org/security/2019/dsa-4501 (vendor-advisory, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- usn.ubuntu.com/4102-1/ (vendor-advisory, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2019-09/msg00006.html (vendor-advisory, Mailing List, Third Party Advisory)
- seclists.org/bugtraq/2019/Sep/17 (mailing-list, Mailing List, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2019-09/msg00067.html (vendor-advisory, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2019/10/msg00005.html (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-9852?
- CVE-2019-9852 is a high-severity vulnerability in Document Foundation Libreoffice, classified under Improper Encoding or Escaping of Output. CVSS score: 7.8/10. Published 2019-08-15.
- How severe is CVE-2019-9852?
- High severity. CVSS v3 base score is 7.8 out of 10.