SB2018112109 - Remote code execution vulnerabilities in Atlantis Word Processor
Published: November 21, 2018
Security Bulletin ID
SB2018112109
CSH Severity
High
Patch available
YES
Number of vulnerabilities
3
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 vulnerabilities.
1) Memory corruption (CVE-ID: CVE-2018-4038)
CWE-ID: CWE-120 - Buffer overflow
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The weakness exists due to arbitrary write in the open document format parser, while trying to null-terminate a string. A remote attacker can trick the victim into opening a specially crafted Word document, pass an untrusted value as a length to a constructor, miscalculate a length and then use it to calculate the position to write a null byte, trigger memory corruption and execute arbitrary code under the context of the application.
Successful exploitation of the vulnerability may result in system compromise.
2) Out-of-bounds write (CVE-ID: CVE-2018-4039)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The weakness exists due to out-of-bounds write vulnerability in the PNG implementation. A remote attacker can trick the victim into opening a specially crafted Word document, trigger memory corruption and execute arbitrary code under the context of the application.
Successful exploitation of the vulnerability may result in system compromise.
3) Use of uninitialized variable (CVE-ID: CVE-2018-4040)
CWE-ID: CWE-457 - Use of Uninitialized Variable
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The weakness exists due to uninitialized pointer in the rich text format parser. A remote attacker can trick the victim into opening a specially crafted Word document, cause certain RTF tokens to dereference a pointer that has been uninitialized and then write to it and execute arbitrary code under the context of the application.
Successful exploitation of the vulnerability may result in system compromise.
Remediation
Install update from vendor's website.