Improper input validation in Document Foundation Libreoffice
CVE-2019-9850
LibreOffice is typically bundled with LibreLogo, a programmable turtle vector graphics script, which can execute arbitrary python commands contained with the document it is launched from. LibreOffice also has a feature where documents can specify that pre-installed scripts can be executed on various document script events such as mouse-over, etc. Protection was added, to address CVE-2019-9848, to block calling LibreLogo from script event handers. However an insufficient url validation vulnerability in LibreOffice allowed malicious to bypass that protection and again trigger calling LibreLogo from script event handlers. This issue affects: Document Foundation LibreOffice versions prior to 6.2.6.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.029 (87.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.034 · newest: 0.029 · change: -0.004
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, 30
- openSUSE Leap — versions 15.0, 15.1
Weakness classification (CWE)
References
- www.libreoffice.org/about-us/security/advisories/CVE-2019-9850 (Vendor Advisory)
- seclists.org/bugtraq/2019/Aug/28 (mailing-list, Mailing List, Third Party Advisory)
- www.debian.org/security/2019/dsa-4501 (vendor-advisory, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-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)
- 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-2019-9850?
- CVE-2019-9850 is a critical-severity vulnerability in Document Foundation Libreoffice, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2019-08-15.
- How severe is CVE-2019-9850?
- Critical severity. CVSS v3 base score is 9.8 out of 10.