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.
EPSS: 0.019 (77.8th percentile) — read the EPSS interpretation.
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.
Affected products
- Document Foundation Libreoffice — versions unspecified
- Libreoffice
- Canonical Ubuntu_linux — versions 16.04, 18.04, 19.04
- Debian Debian_linux — versions 8.0, 9.0, 10.0
- Fedoraproject Fedora — versions 29
- Opensuse Leap — versions 15.0, 15.1
Weakness classification (CWE)
References
- security@documentfoundation.org (Patch, x_refsource_MISC, Vendor Advisory)
- security@documentfoundation.org (mailing-list, x_refsource_BUGTRAQ, Mailing List, Third Party Advisory, Issue Tracking)
- security@documentfoundation.org (vendor-advisory, Third Party Advisory, x_refsource_DEBIAN)
- security@documentfoundation.org (x_refsource_FEDORA, vendor-advisory)
- security@documentfoundation.org (x_refsource_UBUNTU, vendor-advisory, Third Party Advisory)
- security@documentfoundation.org (vendor-advisory, Mailing List, Third Party Advisory, x_refsource_SUSE)
- security@documentfoundation.org (mailing-list, x_refsource_BUGTRAQ, Mailing List, Third Party Advisory)
- security@documentfoundation.org (vendor-advisory, Mailing List, Third Party Advisory, x_refsource_SUSE)
- security@documentfoundation.org (mailing-list, x_refsource_MLIST, 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.