CVE-2019-9853

Insufficient URL decoding flaw in categorizing macro location

Severity Score

7.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Los documentos de LibreOffice pueden contener macros. La ejecución de esas macros está controlada por la configuración de seguridad del documento, por lo general, la ejecución de las macros está bloqueada por defecto. Existía un defecto de decodificación de URL en cómo se procesaban y clasificaban las URL de las macros dentro del documento, resultando en la posibilidad de construir un documento donde la ejecución de macros omitiera la configuración de seguridad. Los documentos fueron detectados correctamente como que contenían macros e incitaron al usuario a su existencia dentro de los documentos, pero las macros dentro del documento no fueron controladas posteriormente por la configuración de seguridad lo que permitía la ejecución arbitraria de macros. Este problema afecta a: LibreOffice serie 6.2 versiones anteriores a 6.2.7 ; LibreOffice serie 6.3 versiones anteriores a 6.3.1.

Open-Xchange App Suite and Documents versions 7.10.2 and below suffer from multiple server-side request forgery vulnerabilities.

*Credits: Thanks to Nils Emmerich of ERNW Research GmbH for discovering and reporting this issue

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-03-17 CVE Reserved
2019-09-27 CVE Published
2024-08-18 EPSS Updated
2024-09-16 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-116: Improper Encoding or Escaping of Output
CWE-838: Inappropriate Encoding for Output Context

CAPEC

References (19)

URL	Tag	Source
http://packetstormsecurity.com/files/156474/Open-Xchange-App-Suite-Documents-Server-Side-Request-Forgery.html	X_refsource_misc
http://seclists.org/fulldisclosure/2020/Feb/23	Mailing List
https://lists.apache.org/thread.html/19c917f7c8a0d8f62142046fabfe3e2c7d6091ef1f92b99c6e79e24e%40%3Ccommits.openoffice.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/27339e8a9a1e9bb47fbdb939b338256d0356250a1974aaf4d774f683%40%3Ccommits.openoffice.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/306a374361891eb17c6cffc99c3d7be1d3152a99c839d4231edc1631%40%3Ccommits.openoffice.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/3a5570ca5cd14ad08e24684c71cfeff3a507f108fe3cf30ba4f58226%40%3Ccommits.openoffice.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/4ae0e6e52600f408d943ded079d314733ce188b04b04471464f89c4f%40%3Ccommits.openoffice.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/70da9481dca267405e1d79e53942264765ef3f55c9a563c3737e3926%40%3Ccommits.openoffice.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/7394e6b5f78a878bd0c44e9bc9adf90b8cdf49e9adc0f287145aba9b%40%3Ccommits.openoffice.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/9dc85d9937ad7f101047c53f78c00e8ceb135eaeff7dcf4724b46f2c%40%3Ccommits.openoffice.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/a5231ad45b030b54828c7b0b62a7e7d4b48481c7cb83ff628e07fa43%40%3Ccommits.openoffice.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/a540d1b6f9a7ebb206adba02839f654a6ee63a7b0976f559a847e49a%40%3Ccommits.openoffice.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/ca216900abd846f0220fe18b95f9f787bdbe0e87fa4eee822073cd69%40%3Ccommits.openoffice.apache.org%3E	Mailing List
https://lists.debian.org/debian-lts-announce/2019/10/msg00005.html	Mailing List

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00040.html	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KQGBRSD73KTDZ2MPAOL7FBWO3SQVYE5B	2023-11-07
https://www.libreoffice.org/about-us/security/advisories/CVE-2019-9853	2023-11-07
https://access.redhat.com/security/cve/CVE-2019-9853	2020-04-28
https://bugzilla.redhat.com/show_bug.cgi?id=1797466	2020-04-28

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Libreoffice Search vendor "Libreoffice"		Libreoffice Search vendor "Libreoffice" for product "Libreoffice"				>= 6.2.0 < 6.2.6 Search vendor "Libreoffice" for product "Libreoffice" and version " >= 6.2.0 < 6.2.6"		-		Affected
Libreoffice Search vendor "Libreoffice"		Libreoffice Search vendor "Libreoffice" for product "Libreoffice"				>= 6.3.0 < 6.3.1 Search vendor "Libreoffice" for product "Libreoffice" and version " >= 6.3.0 < 6.3.1"		-		Affected