What’s Vulnerable › Vulnerabilities

CVE-2018-10120

• Severity: high (CVSS 7.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-04-16 · updated 2026-06-17
• Weakness: CWE-129

Description

The SwCTBWrapper::Read function in sw/source/filter/ww8/ww8toolbar.cxx in LibreOffice before 5.4.6.1 and 6.x before 6.0.2.1 does not validate a customizations index, which allows remote attackers to cause a denial of service (heap-based buffer overflow with write access) or possibly have unspecified other impact via a crafted document that contains a certain Microsoft Word record.

Affected products

• Canonical Ubuntu Linux: 14.04, 16.04
• Debian Linux: 7.0, 8.0, 9.0
• The Document Foundation LibreOffice: before 5.4.6.1; from 6.0.0 before 6.0.2.1 — fixed in 5.4.6.1, 6.0.2.1
• RedHat Enterprise Linux Desktop: 7.0
• RedHat Enterprise Linux Server: 7.0
• RedHat Enterprise Linux Workstation: 7.0

How to fix

Upgrade to a fixed version: The Document Foundation LibreOffice 5.4.6.1, 6.0.2.1. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/errata/RHSA-2018:3054
• https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=6173
• https://gerrit.libreoffice.org/#/c/49486/
• https://gerrit.libreoffice.org/#/c/49499/
• https://gerrit.libreoffice.org/#/c/49500/
• https://gerrit.libreoffice.org/gitweb?p=core.git%3Ba=commit%3Bh=017fcc2fcd00af17a97bd5463d89662404f57667
• https://lists.debian.org/debian-lts-announce/2018/04/msg00021.html
• https://usn.ubuntu.com/3883-1/
• https://www.debian.org/security/2018/dsa-4178
• https://www.libreoffice.org/about-us/security/advisories/cve-2018-10120/
• https://access.redhat.com/errata/RHSA-2018:3054
• https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=6173

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