CVE-2019-9853

Insufficient URL decoding flaw in categorizing macro location

Published Sep 27, 2019 CVSS 3.1 · 7.8 High EPSS 3.1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-1947-1 libreoffice security update
EUVD EUVD EUVD-2019-19209 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.
References
Link Providers
http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00040.html cve-icon cve-icon
http://packetstormsecurity.com/files/156474/Open-Xchange-App-Suite-Documents-Server-Side-Request-Forgery.html cve-icon cve-icon
http://seclists.org/fulldisclosure/2020/Feb/23 cve-icon cve-icon
https://lists.apache.org/thread.html/19c917f7c8a0d8f62142046fabfe3e2c7d6091ef1f92b99c6e79e24e%40%3Ccommits.openoffice.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/27339e8a9a1e9bb47fbdb939b338256d0356250a1974aaf4d774f683%40%3Ccommits.openoffice.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/306a374361891eb17c6cffc99c3d7be1d3152a99c839d4231edc1631%40%3Ccommits.openoffice.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/3a5570ca5cd14ad08e24684c71cfeff3a507f108fe3cf30ba4f58226%40%3Ccommits.openoffice.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/4ae0e6e52600f408d943ded079d314733ce188b04b04471464f89c4f%40%3Ccommits.openoffice.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/70da9481dca267405e1d79e53942264765ef3f55c9a563c3737e3926%40%3Ccommits.openoffice.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/7394e6b5f78a878bd0c44e9bc9adf90b8cdf49e9adc0f287145aba9b%40%3Ccommits.openoffice.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/9dc85d9937ad7f101047c53f78c00e8ceb135eaeff7dcf4724b46f2c%40%3Ccommits.openoffice.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/a5231ad45b030b54828c7b0b62a7e7d4b48481c7cb83ff628e07fa43%40%3Ccommits.openoffice.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/a540d1b6f9a7ebb206adba02839f654a6ee63a7b0976f559a847e49a%40%3Ccommits.openoffice.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/ca216900abd846f0220fe18b95f9f787bdbe0e87fa4eee822073cd69%40%3Ccommits.openoffice.apache.org%3E cve-icon cve-icon
https://lists.debian.org/debian-lts-announce/2019/10/msg00005.html cve-icon cve-icon
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KQGBRSD73KTDZ2MPAOL7FBWO3SQVYE5B/ cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2019-9853 cve-icon
https://www.cve.org/CVERecord?id=CVE-2019-9853 cve-icon
https://www.libreoffice.org/about-us/security/advisories/CVE-2019-9853/ cve-icon cve-icon cve-icon
History

No history.

Weaknesses

Sources

Status
PUBLISHED
Assigner
Document Fdn.
Published
Updated
Sep 16, 2024, 5:17 PM
Reserved
Mar 17, 2019, 12:00 AM
Status
Modified
Published
Sep 27, 2019, 4:15 PM
Modified
Jun 17, 2026, 2:44 AM
Severity
Moderate
Public date
Sep 27, 2019, 12:00 AM