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Fencer Intel
high 7.8

CVE-2019-9853 json

Insufficient URL decoding flaw in categorizing macro location

published 7y ago modified 4mo ago also EUVD-2019-19209

cvss
7.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.1%
EPSS 3.1% chance of exploitation in 30 days, percentile 87%
public exploits
0
none known

Summary

LibreOffice documents can contain macros. The execution of those macros is controlled by the document security settings, typically execution of macros are blocked by default. A URL decoding flaw existed in how the urls to the macros within the document were processed and categorized, resulting in the possibility to construct a document where macro execution bypassed the security settings. The documents were correctly detected as containing macros, and prompted the user to their existence within the documents, but macros within the document were subsequently not controlled by the security settings allowing arbitrary macro execution This issue affects: LibreOffice 6.2 series versions prior to 6.2.7; LibreOffice 6.3 series versions prior to 6.3.1.

Patch / fix

  • Document Foundation LibreOffice 6.2.7, 6.3.1
  • libreoffice Debian 14, Debian 13, Debian 12 1:6.3.0-1

debian advisories DEBIAN-CVE-2019-9853

  • libreoffice Ubuntu 16.04 LTS 1:5.1.6~rc2-0ubuntu1~xenial9
  • libreoffice Ubuntu 18.04 LTS 1:6.0.7-0ubuntu0.18.04.9

ubuntu advisories UBUNTU-CVE-2019-9853

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libreoffice RHEL 8 1:6.0.6.1-20.el8
  • autocorr-af RHEL 8 1:6.0.6.1-20.el8
  • autocorr-bg RHEL 8 1:6.0.6.1-20.el8
  • autocorr-ca RHEL 8 1:6.0.6.1-20.el8
  • autocorr-cs RHEL 8 1:6.0.6.1-20.el8
  • autocorr-da RHEL 8 1:6.0.6.1-20.el8
  • autocorr-de RHEL 8 1:6.0.6.1-20.el8
  • autocorr-en RHEL 8 1:6.0.6.1-20.el8

red hat advisories RHSA-2020:1598RHSA-2020:1151

  • bluez SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES 12 SP5 +5 more 5.13-5.20.6
  • gperf SLE Software Development Kit 12 SP5, SLE Software Development Kit 12 SP4 3.1-19.4.1
  • libmwaw SLE Workstation Extension 12 SP5, SLE Workstation Extension 12 SP4, SLE Software Development Kit 12 SP5 +1 more 0.3.15-7.15.1
  • libixion SLE Workstation Extension 12 SP5, SLE Workstation Extension 12 SP4, SLE Software Development Kit 12 SP5 +1 more 0.15.0-13.12.1
  • liborcus SLE Workstation Extension 12 SP5, SLE Workstation Extension 12 SP4, SLE Software Development Kit 12 SP5 +1 more 0.15.3-10.15.1
  • cmis-client SLE Workstation Extension 12 SP5, SLE Workstation Extension 12 SP4, SLE Software Development Kit 12 SP5 +1 more 0.5.2-9.3.1
  • libreoffice SLE Workstation Extension 12 SP5, SLE Workstation Extension 12 SP4, SLE Software Development Kit 12 SP5 +1 more 6.3.3.2-43.59.5
  • myspell-dictionaries SLE Workstation Extension 12 SP5, SLE Workstation Extension 12 SP4 20191016-16.21.1

suse advisories SUSE-SU-2020:0372-1SUSE-SU-2020:0121-1

  • libreoffice openSUSE Tumbleweed 7.1.5.2-3.13
  • spdlog openSUSE Leap 15.1 0.16.3-lp151.3.3.1
  • libmwaw openSUSE Leap 15.1 0.3.15-lp151.2.3.1
  • libixion openSUSE Leap 15.1 0.15.0-lp151.4.6.1
  • liborcus openSUSE Leap 15.1 0.15.3-lp151.3.6.1
  • mdds-1_5 openSUSE Leap 15.1 1.5.0-lp151.2.1
  • cmis-client openSUSE Leap 15.1 0.5.2-lp151.3.3.1
  • libreoffice openSUSE Leap 15.1 6.3.3.2-lp151.3.9.1

opensuse advisories openSUSE-SU-2024:10983-1openSUSE-SU-2019:2709-1

Is CVE-2019-9853 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-9853 updated cvss 7.8

libreoffice: Insufficient URL decoding flaw in categorizing macro location

  • Red Hat Enterprise Linux 6 autocorr-af, autocorr-bg, autocorr-ca, autocorr-cs, autocorr-da, autocorr-de, +60 more
    affected: no fix planned “Out of support scope”
  • Red Hat CodeReady Linux Builder (v. 8) libreoffice-sdk 6.0.6.1-20.el8, libreoffice-x11 6.0.6.1-20.el8, libreoffice-gtk2 6.0.6.1-20.el8 Red Hat Enterprise Linux AppStream (v. 8) autocorr-af 6.0.6.1-20.el8, autocorr-bg 6.0.6.1-20.el8, autocorr-ca 6.0.6.1-20.el8, autocorr-cs 6.0.6.1-20.el8, autocorr-da 6.0.6.1-20.el8, autocorr-de 6.0.6.1-20.el8, +96 more
    fixed: vendor fix RHSA-2020:1598
  • Red Hat Enterprise Linux Client (v. 7) autocorr-af 5.3.6.1-24.el7, autocorr-bg 5.3.6.1-24.el7, autocorr-ca 5.3.6.1-24.el7, autocorr-cs 5.3.6.1-24.el7, autocorr-da 5.3.6.1-24.el7, autocorr-de 5.3.6.1-24.el7, +51 more Red Hat Enterprise Linux Client Optional (v. 7) libreoffice 5.3.6.1-24.el7, libreoffice-bsh 5.3.6.1-24.el7, libreoffice-sdk 5.3.6.1-24.el7, libreoffice-glade 5.3.6.1-24.el7, libreoffice-rhino 5.3.6.1-24.el7, libreoffice-help-ar 5.3.6.1-24.el7, +48 more Red Hat Enterprise Linux Server Optional (v. 7) autocorr-af 5.3.6.1-24.el7, autocorr-bg 5.3.6.1-24.el7, autocorr-ca 5.3.6.1-24.el7, autocorr-cs 5.3.6.1-24.el7, autocorr-da 5.3.6.1-24.el7, autocorr-de 5.3.6.1-24.el7, +104 more Red Hat Enterprise Linux Workstation (v. 7) autocorr-af 5.3.6.1-24.el7, autocorr-bg 5.3.6.1-24.el7, autocorr-ca 5.3.6.1-24.el7, autocorr-cs 5.3.6.1-24.el7, autocorr-da 5.3.6.1-24.el7, autocorr-de 5.3.6.1-24.el7, +51 more Red Hat Enterprise Linux Workstation Optional (v. 7) libreoffice 5.3.6.1-24.el7, libreoffice-bsh 5.3.6.1-24.el7, libreoffice-sdk 5.3.6.1-24.el7, libreoffice-glade 5.3.6.1-24.el7, libreoffice-rhino 5.3.6.1-24.el7, libreoffice-help-ar 5.3.6.1-24.el7, +48 more
    fixed: vendor fix RHSA-2020:1151

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.08% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected products

  • Document Foundation LibreOffice

Classification

Weakness
  • CWE-116 Improper Encoding or Escaping of Output

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.