Vulnerabilities > CVE-2018-4038 - Incorrect Calculation of Buffer Size vulnerability in Atlantiswordprocessor Atlantis Word Processor 3.2.7.1/3.2.7.2

047910
CVSS 6.8 - MEDIUM
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.

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

idTALOS-2018-0711
last seen2019-05-29
published2018-11-20
reporterTalos Intelligence
sourcehttp://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0711
titleAtlantis Word Processor open document format unchecked NewAnsiString length remote code execution vulnerability

The Hacker News

idTHN:256E89A426EB6F7EB8009CE059DA58AD
last seen2018-11-20
modified2018-11-20
published2018-11-20
reporterThe Hacker News
sourcehttps://thehackernews.com/2018/11/word-processor-vulnerability.html
title3 New Code Execution Flaws Discovered in Atlantis Word Processor