CVE-2019-9853

MEDIUM

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.

References

https://lists.apache.org/thread.html/[email protected]%3Ccommits.openoffice.apache.org%3E

https://lists.apache.org/thread.html/[email protected]%3Ccommits.openoffice.apache.org%3E

https://lists.apache.org/thread.html/[email protected]%3Ccommits.openoffice.apache.org%3E

https://lists.debian.org/debian-lts-announce/2019/10/msg00005.html

https://lists.fedoraproject.org/archives/list/[email protected]/message/KQGBRSD73KTDZ2MPAOL7FBWO3SQVYE5B/

https://www.libreoffice.org/about-us/security/advisories/CVE-2019-9853/

Details

Source: MITRE

Published: 2019-09-27

Updated: 2019-10-06

Type: CWE-116

Risk Information

CVSS v2.0

Base Score: 6.8

Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3.0

Base Score: 7.8

Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 1.8

Severity: HIGH