CVE-2021-25832 : A heap buffer overflow vulnerability inside of BMP image processing was found at

A heap buffer overflow vulnerability inside of BMP image processing was found at [core] module of ONLYOFFICE DocumentServer v4.0.0-9-v6.0.0. Using this vulnerability, an attacker is able to gain remote code executions on DocumentServer.

Published 2021-03-01 16:15:14

Updated 2021-03-15 19:53:32

Source MITRE

View at NVD, CVE.org

Vulnerability category: OverflowMemory Corruption

Products affected by CVE-2021-25832

Onlyoffice » Document Server
Versions from including (>=) 4.0.0-9 and up to, including, (<=) 6.0.0
cpe:2.3:a:onlyoffice:document_server:*:*:*:*:*:*:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2021-25832

EPSS FAQ

9.11%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 95 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-25832

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
7.5	HIGH	AV:N/AC:L/Au:N/C:P/I:P/A:P	10.0	6.4	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: Partial
9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	3.9	5.9	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE ids for CVE-2021-25832

CWE-787 Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-25832

https://github.com/ONLYOFFICE/core/blob/v6.0.1.15/ASCOfficePPTXFile/Editor/BinaryFileReaderWriter.cpp#L424

core/BinaryFileReaderWriter.cpp at v6.0.1.15 · ONLYOFFICE/core · GitHub
Vendor Advisory
https://github.com/ONLYOFFICE/DocumentServer

GitHub - ONLYOFFICE/DocumentServer: ONLYOFFICE Document Server is an online office suite comprising viewers and editors for texts, spreadsheets and presentations, fully compatible with Office Open XML
Product

CVEs referencing this url
https://github.com/ONLYOFFICE/core/blob/v6.0.1.15/ASCOfficePPTXFile/Editor/BinaryFileReaderWriter.cpp#L428

core/BinaryFileReaderWriter.cpp at v6.0.1.15 · ONLYOFFICE/core · GitHub
Vendor Advisory
https://github.com/ONLYOFFICE/core/blob/v6.0.1.15/DesktopEditor/cximage/CxImage/ximabmp.cpp#L354

core/ximabmp.cpp at v6.0.1.15 · ONLYOFFICE/core · GitHub
Vendor Advisory
https://github.com/ONLYOFFICE/core/blob/v6.0.1.15/DesktopEditor/cximage/CxImage/ximabmp.cpp#L358

core/ximabmp.cpp at v6.0.1.15 · ONLYOFFICE/core · GitHub
Vendor Advisory
https://github.com/merrychap/poc_exploits/tree/master/ONLYOFFICE/CVE-2021-25832

poc_exploits/ONLYOFFICE/CVE-2021-25832 at master · merrychap/poc_exploits · GitHub
Exploit;Third Party Advisory
https://github.com/ONLYOFFICE/core

GitHub - ONLYOFFICE/core: Server core components which are a part of ONLYOFFICE Document Server
Product;Vendor Advisory

CVEs referencing this url

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Vulnerability Details : CVE-2021-25832

Products affected by CVE-2021-25832

Exploit prediction scoring system (EPSS) score for CVE-2021-25832

CVSS scores for CVE-2021-25832

CWE ids for CVE-2021-25832

References for CVE-2021-25832