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Fencer Intel
critical 9.8

CVE-2019-9855 json

Windows 8.3 path equivalence handling flaw allows LibreLogo script execution

published 7y ago modified 4mo ago also EUVD-2019-19211

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.0%
EPSS 3.0% chance of exploitation in 30 days, percentile 87%
public exploits
0
none known

Summary

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 block calling LibreLogo from script event handers. However a Windows 8.3 path equivalence handling flaw left LibreOffice vulnerable under Windows that a document could trigger executing LibreLogo via a Windows filename pseudonym. This issue affects: Document Foundation LibreOffice 6.2 versions prior to 6.2.7; 6.3 versions prior to 6.3.1.

Patch / fix

  • Document Foundation LibreOffice 6.2.7, 6.3.1
  • libreoffice SLE Workstation Extension 15 6.2.7.1-3.24.4
  • libreoffice SLE Workstation Extension 15 SP1 6.2.7.1-8.10.1
  • libreoffice SLED 12 SP4, SLE Workstation Extension 12 SP4, SLE Software Development Kit 12 SP4 6.2.7.1-43.56.3

suse advisories SUSE-SU-2019:2686-1SUSE-SU-2019:2402-1SUSE-SU-2019:2401-1

  • libreoffice openSUSE Tumbleweed 7.1.5.2-3.13
  • libreoffice openSUSE Leap 15.0 6.2.7.1-lp150.2.19.1
  • libreoffice openSUSE Leap 15.1 6.2.7.1-lp151.3.6.1

opensuse advisories openSUSE-SU-2024:10983-1openSUSE-SU-2019:2361-1openSUSE-SU-2019:2183-1

  • libreoffice Alpine 3.10 6.2.7.1-r0
  • libreoffice Alpine 3.24, Alpine 3.23, Alpine 3.22 +11 more 6.3.1.2-r0

alpine advisories ALPINE-CVE-2019-9855

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

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Exploit prediction

2.96% 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 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • Document Foundation LibreOffice

Classification

Weakness
  • CWE-417 Communication Channel Errors

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.