Privilege Escalation Vulnerability in Windows Installer by Flexera
CVE-2021-41526

7.8HIGH

Key Information:

Vendor

Flexera

Status
Revenera Installshield
Vendor
CVE Published:
29 March 2023

What is CVE-2021-41526?

A vulnerability exists within the Windows Installer (MSI) that utilizes InstallScript custom actions. This flaw could enable an attacker to escalate privileges when the 'repair' function of the MSI is executed. The risk highlights the importance of scrutinizing how custom scripts are employed in installation packages. Proper mitigation strategies are essential to prevent unauthorized access to elevated privileges during installation processes.

References

https://community.flexera.com/t5/InstallShield-Knowledge-...
https://github.com/mandiant/Vulnerability-Disclosures/blo...
http://seclists.org/fulldisclosure/2024/Apr/24
mailing-list

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

  • Vulnerability Reserved

.