CVE-2019-9855
CVE-2019-9855 is a critical-severity vulnerability in Libreoffice with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-417.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 7.5
- EPSS exploit prediction: 3% (84th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-417
- Affected product: Libreoffice
- Published:
- Last modified:
Description
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.
Frequently asked questions
- What is CVE-2019-9855?
- 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.
- How severe is CVE-2019-9855?
- CVE-2019-9855 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2019-9855 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2019-9855?
- CVE-2019-9855 primarily affects Libreoffice. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2019-9855?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2019-9855 published?
- CVE-2019-9855 was published on 2019-09-06 and last updated on 2026-06-17.
References
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00067.html
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00055.html
- https://www.libreoffice.org/about-us/security/advisories/CVE-2019-9855/
Affected products (3)
- cpe:2.3:a:libreoffice:libreoffice:*:*:*:*:*:*:*:*
- cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*
- cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
More vulnerabilities in Libreoffice
- CVE-2014-0247 — Critical (CVSS 10.0): LibreOffice 4.2.4 executes unspecified VBA macros automatically, which has unspecified impact and attack vectors,…
- CVE-2024-5261 — Critical (CVSS 9.8): Improper Certificate Validation vulnerability in LibreOffice "LibreOfficeKit" mode disables TLS certification…
- CVE-2019-9851 — Critical (CVSS 9.8): LibreOffice is typically bundled with LibreLogo, a programmable turtle vector graphics script, which can execute…
- CVE-2019-9850 — Critical (CVSS 9.8): LibreOffice is typically bundled with LibreLogo, a programmable turtle vector graphics script, which can execute…
- CVE-2019-9848 — Critical (CVSS 9.8): LibreOffice has a feature where documents can specify that pre-installed scripts can be executed on various document…
- CVE-2018-14939 — Critical (CVSS 9.8): The get_app_path function in desktop/unx/source/start.c in LibreOffice through 6.0.5 mishandles the realpath function…
All CVEs affecting Libreoffice →
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- CVE-2017-3969 — High (CVSS 8.2): Abuse of communication channels vulnerability in the server in McAfee Network Security Management (NSM) before…
- CVE-2017-7760 — High (CVSS 7.8): The Mozilla Windows updater modifies some files to be updated by reading the original file and applying changes to it.…
- CVE-2018-14900 — High (CVSS 7.5): On EPSON WF-2750 printers with firmware JP02I2, there is no filtering of print jobs. Remote attackers can send print…