Local Privilege Escalation in PaperStream IP by Fujitsu
CVE-2018-16156

7.8HIGH

Key Information:

Vendor

Fujitsu

Status
Paperstream Ip \(twain\)
Vendor
CVE Published:
17 May 2019

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 13%

What is CVE-2018-16156?

A local privilege escalation vulnerability exists in PaperStream IP (TWAIN) version 1.42.0.5685 (Service Update 7) due to the FJTWSVIC service running with SYSTEM privileges. This service processes unauthenticated messages over a named pipe and can dynamically load the UninOldIS.dll library, executing the 'ChangeUninstallString' function. Since the default installation does not include this library, an attacker could place a malicious DLL with that name in a directory listed in the PATH environment variable, allowing them to escalate their privileges to SYSTEM level.

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2018-16156-Exploit
Created by securifera

References

https://www.securifera.com/advisories/cve-2018-16156/
x_refsource_MISC
http://packetstormsecurity.com/files/160832/PaperStream-I...
x_refsource_MISC

EPSS Score

13% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability Reserved

JSON
.
CVE-2018-16156 : Local Privilege Escalation in PaperStream IP by Fujitsu