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CVE-2021-33035— Buffer overflow from a crafted DBF file

Quick assessment

Affected
Apache Software Foundation Apache OpenOffice
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache OpenOffice是美国阿帕奇（Apache）基金会的一款开源的办公软件套件。该套件包含文本文档、电子表格、演示文稿、绘图、数据库等。 Apache OpenOffice 存在安全漏洞，该漏洞源于网络系统或产品在内存上执行操作时，未正确验证数据边界，导致向关联的其他内存位置上执行了错误的读写操作。攻击者可利用该漏洞导致缓冲区溢出或堆溢出等。

AI Predicted 9.8 Difficulty: Easy EPSS 50.56% · P99

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2021-33035

Vulnerability Information
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Vulnerability Title
Buffer overflow from a crafted DBF file
Source: CVE Program / CVE List V5
Vulnerability Description
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
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
Source: CVE Program / CVE List V5
Vulnerability Title
Apache OpenOffice 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache OpenOffice是美国阿帕奇（Apache）基金会的一款开源的办公软件套件。该套件包含文本文档、电子表格、演示文稿、绘图、数据库等。 Apache OpenOffice 存在安全漏洞，该漏洞源于网络系统或产品在内存上执行操作时，未正确验证数据边界，导致向关联的其他内存位置上执行了错误的读写操作。攻击者可利用该漏洞导致缓冲区溢出或堆溢出等。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache OpenOffice Apache OpenOffice ~ 4.1.10 -

II. Public POCs for CVE-2021-33035

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III. Intelligence Information for CVE-2021-33035

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Patches & Fixes for CVE-2021-33035 (1)

Mailing List Discussions for CVE-2021-33035 (3)

IV. Related Vulnerabilities

Same product: Apache OpenOffice
Same vendor: Apache Software Foundation
Same weakness: CWE-120

V. Comments for CVE-2021-33035

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