CVE-2019-9853

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.

CVSS v3.0 7.8 HIGH
CVSS v2.0 6.8 MEDIUM

7.8^/10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

6.8^/10

CVSS v2.0 : MEDIUM

V2 Legend

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

Exploitability : 8.6 / Impact : 6.4

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://www.libreoffice.org/about-us/security/advisories/CVE-2019-9853/	Vendor Advisory
https://lists.debian.org/debian-lts-announce/2019/10/msg00005.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KQGBRSD73KTDZ2MPAOL7FBWO3SQVYE5B/
https://lists.apache.org/thread.html/3a5570ca5cd14ad08e24684c71cfeff3a507f108fe3cf30ba4f58226@%3Ccommits.openoffice.apache.org%3E
https://lists.apache.org/thread.html/4ae0e6e52600f408d943ded079d314733ce188b04b04471464f89c4f@%3Ccommits.openoffice.apache.org%3E
https://lists.apache.org/thread.html/7394e6b5f78a878bd0c44e9bc9adf90b8cdf49e9adc0f287145aba9b@%3Ccommits.openoffice.apache.org%3E
https://lists.apache.org/thread.html/a5231ad45b030b54828c7b0b62a7e7d4b48481c7cb83ff628e07fa43@%3Ccommits.openoffice.apache.org%3E
https://lists.apache.org/thread.html/a540d1b6f9a7ebb206adba02839f654a6ee63a7b0976f559a847e49a@%3Ccommits.openoffice.apache.org%3E
https://lists.apache.org/thread.html/9dc85d9937ad7f101047c53f78c00e8ceb135eaeff7dcf4724b46f2c@%3Ccommits.openoffice.apache.org%3E
https://lists.apache.org/thread.html/70da9481dca267405e1d79e53942264765ef3f55c9a563c3737e3926@%3Ccommits.openoffice.apache.org%3E
https://lists.apache.org/thread.html/ca216900abd846f0220fe18b95f9f787bdbe0e87fa4eee822073cd69@%3Ccommits.openoffice.apache.org%3E
https://lists.apache.org/thread.html/19c917f7c8a0d8f62142046fabfe3e2c7d6091ef1f92b99c6e79e24e@%3Ccommits.openoffice.apache.org%3E
https://lists.apache.org/thread.html/306a374361891eb17c6cffc99c3d7be1d3152a99c839d4231edc1631@%3Ccommits.openoffice.apache.org%3E
https://lists.apache.org/thread.html/27339e8a9a1e9bb47fbdb939b338256d0356250a1974aaf4d774f683@%3Ccommits.openoffice.apache.org%3E
http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00040.html
http://seclists.org/fulldisclosure/2020/Feb/23
http://packetstormsecurity.com/files/156474/Open-Xchange-App-Suite-Documents-Server-Side-Request-Forgery.html

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:libreoffice:libreoffice::::::::
	cpe:2.3:a:libreoffice:libreoffice::::::::

Information

Published : 2019-09-27 09:15

Updated : 2019-10-06 07:15

NVD link : CVE-2019-9853

Mitre link : CVE-2019-9853

JSON object : View

CWE

CWE-116

Improper Encoding or Escaping of Output

Products Affected

libreoffice

libreoffice

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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."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-116"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2019-9853", "ASSIGNER": "security@documentfoundation.org"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 6.8, "accessVector": "NETWORK", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "MEDIUM", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "severity": "MEDIUM", "acInsufInfo": false, "impactScore": 6.4, "obtainAllPrivilege": false, "exploitabilityScore": 8.6, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": true}, "baseMetricV3": {"cvssV3": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}}, "publishedDate": "2019-09-27T16:15Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:libreoffice:libreoffice:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "6.2.6", "versionStartIncluding": "6.2.0"}, {"cpe23Uri": "cpe:2.3:a:libreoffice:libreoffice:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "6.3.1", "versionStartIncluding": "6.3.0"}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2019-10-06T14:15Z"}

7.8 /10