Vulnerability Details : CVE-2021-33035

Apache OpenOffice opens dBase/DBF documents and shows the contents as spreadsheets. DBF are database files with data organized in fields. When reading DBF data the size of certain fields is not checked: the data is just copied into local variables. A carefully crafted document could overflow the allocated space, leading to the execution of arbitrary code by altering the contents of the program stack. This issue affects Apache OpenOffice up to and including version 4.1.10

Vulnerability category: Overflow

Published 2021-09-23 08:15:07

Updated 2021-12-01 14:15:43

Source Apache Software Foundation

View at NVD, CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2021-33035

Probability of exploitation activity in the next 30 days: 0.94%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 81 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2021-33035

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Source
6.8	MEDIUM	AV:N/AC:M/Au:N/C:P/I:P/A:P	8.6	6.4	[email protected]
Access Vector: Network Access Complexity: Medium Authentication: None Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: Partial
7.8	HIGH	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	1.8	5.9	[email protected]
Attack Vector: Local Attack Complexity: Low Privileges Required: None User Interaction: Required Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE ids for CVE-2021-33035

CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow.
Assigned by:
- [email protected] (Primary)
- [email protected] (Secondary)

References for CVE-2021-33035

http://www.openwall.com/lists/oss-security/2021/10/07/3

Mailing List;Patch;Third Party Advisory
https://lists.apache.org/thread.html/r929c0c6a53cad64a1007b878342756badbb05ddd9b8f31a6d0b424cb@%3Cannounce.apache.org%3E

Mailing List;Patch;Vendor Advisory
https://github.com/apache/openoffice/commit/efddaef0151af3be16078cc4d88c6bae0f911e56#diff-ea66e734dd358922aba12ad4ba39c96bdc6cbde587d07dbc63d04daa0a30e90f

Patch;Third Party Advisory
https://lists.apache.org/thread.html/r1ab8532e11f41bc7ca057ac7e39cab25f2e1f9d5f4929788ae21c8b9@%3Cusers.openoffice.apache.org%3E

Mailing List;Patch;Vendor Advisory

Products affected by CVE-2021-33035

Apache » Openoffice
Versions up to, including, (<=) 4.1.10
cpe:2.3:a:apache:openoffice:*:*:*:*:*:*:*:*
Matching versions