Executive Summary

CVE-2018-25261 is a local buffer overflow vulnerability found in Iperius Backup version 5.8.1. It occurs in the structured exception handling (SEH) mechanism when a local attacker supplies a malicious file path. Specifically, an attacker can create a backup job with a crafted payload in the external file location field. When the backup job executes, this crafted input triggers a buffer overflow, allowing the attacker to execute arbitrary code with the privileges of the application.

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Impact Analysis

This vulnerability can have serious impacts because it allows a local attacker to execute arbitrary code with the same privileges as the Iperius Backup application. This means the attacker could potentially take control of the system, modify or delete backup data, install malware, or perform other malicious actions that compromise system integrity, confidentiality, and availability.

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Compliance Impact

Iperius Backup 5.8.1 contains a local buffer overflow vulnerability that allows attackers to execute arbitrary code with application privileges. This can lead to unauthorized access, modification, or disruption of backup data.

Such unauthorized code execution and potential data compromise can negatively impact compliance with common standards and regulations like GDPR and HIPAA, which require protection of data confidentiality, integrity, and availability.

Specifically, the vulnerability's high impact on confidentiality, integrity, and availability (as indicated by its CVSS score) means that organizations using the affected software may face increased risk of data breaches or loss, potentially resulting in non-compliance with these regulations.

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Detection Guidance

This vulnerability can be detected by checking for the presence of Iperius Backup version 5.8.1 or earlier on your system, as the flaw exists in these versions. Specifically, detection involves identifying backup jobs configured to run external programs or open external files with potentially malicious file paths.

One practical detection method is to inspect backup job configurations for suspicious or unusual file paths in the 'external file location' field, which could contain crafted payloads triggering the buffer overflow.

Since the exploit involves creating a file named 'iperius.txt' with a crafted payload, scanning for this or similar files in backup job configurations or related directories may help detect exploitation attempts.

No specific network commands are applicable because this is a local vulnerability requiring local access.

• On Windows systems, use PowerShell or command prompt to list backup jobs and check their external file location fields for suspicious entries.
• Example PowerShell command to search for 'iperius.txt' or suspicious file paths in backup job configuration files (assuming they are stored in a known directory):
• Get-ChildItem -Path 'C:\Path\To\Iperius\Backup\Jobs' -Recurse | Select-String -Pattern 'iperius.txt'
• Manually review backup job settings within the Iperius Backup application, especially the 'other processes' tab where external programs or files are configured.

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Mitigation Strategies

To mitigate this vulnerability immediately, you should avoid running backup jobs that include external file locations or programs that could be manipulated with crafted payloads.

If possible, upgrade Iperius Backup to a version later than 5.8.1 where this vulnerability is fixed.

Restrict local access to systems running Iperius Backup to trusted users only, as the attack requires local access.

Review and remove any backup jobs that run external programs or open external files, especially those with suspicious or unverified file paths.

Implement monitoring for application crashes or unusual behavior in Iperius Backup, which may indicate exploitation attempts.

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