Vulnerabilities > CVE-2018-4038 - Incorrect Calculation of Buffer Size vulnerability in Atlantiswordprocessor Atlantis Word Processor 3.2.7.1/3.2.7.2
Attack vector
NETWORK Attack complexity
MEDIUM Privileges required
NONE Confidentiality impact
PARTIAL Integrity impact
PARTIAL Availability impact
PARTIAL Summary
An exploitable arbitrary write vulnerability exists in the open document format parser of the Atlantis Word Processor, version 3.2.7.2, while trying to null-terminate a string. A specially crafted document can allow an attacker to pass an untrusted value as a length to a constructor. This constructor will miscalculate a length and then use it to calculate the position to write a null byte. This can allow an attacker to corrupt memory, which can result in code execution under the context of the application. An attacker must convince a victim to open a specially crafted document in order to trigger this vulnerability.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| Application | 2 |
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Overflow Buffers Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
- Buffer Overflow via Parameter Expansion In this attack, the target software is given input that the attacker knows will be modified and expanded in size during processing. This attack relies on the target software failing to anticipate that the expanded data may exceed some internal limit, thereby creating a buffer overflow.
Talos
| id | TALOS-2018-0711 |
| last seen | 2019-05-29 |
| published | 2018-11-20 |
| reporter | Talos Intelligence |
| source | http://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0711 |
| title | Atlantis Word Processor open document format unchecked NewAnsiString length remote code execution vulnerability |
The Hacker News
| id | THN:256E89A426EB6F7EB8009CE059DA58AD |
| last seen | 2018-11-20 |
| modified | 2018-11-20 |
| published | 2018-11-20 |
| reporter | The Hacker News |
| source | https://thehackernews.com/2018/11/word-processor-vulnerability.html |
| title | 3 New Code Execution Flaws Discovered in Atlantis Word Processor |