Executive Summary

This vulnerability exists in SINEC INS versions earlier than V1.0 SP2 Update 6. It involves a binary configured with the cap_dac_override capability, which allows the process to bypass file system permission checks.

As a result, a local attacker can gain unrestricted access to the file system, enabling them to modify files arbitrarily and escalate their privileges to root on the system.

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Impact Analysis

This vulnerability can allow a local attacker to escalate their privileges to root, giving them full control over the affected system.

With root privileges, the attacker can arbitrarily modify files, potentially leading to system compromise, data loss, or unauthorized access to sensitive information.

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Compliance Impact

The vulnerability allows a local attacker to bypass file system permission checks and escalate privileges to root, enabling arbitrary file modification and unrestricted file system access.

Such unauthorized access and modification of files could lead to breaches of confidentiality, integrity, and availability of sensitive data, which are critical requirements in standards and regulations like GDPR and HIPAA.

Therefore, this vulnerability could negatively impact compliance with these regulations by exposing protected data to unauthorized access and modification.

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Detection Guidance

This vulnerability involves a binary in SINEC INS configured with the cap_dac_override capability, which allows bypassing file system permission checks. To detect this on your system, you can check for binaries with the cap_dac_override capability set.

• Use the command: getcap -r / 2>/dev/null | grep cap_dac_override
• Alternatively, find the specific SINEC INS binary and check its capabilities with: getcap /path/to/binary

Detecting unusual file system access or privilege escalation attempts related to this binary may also help identify exploitation.

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Mitigation Strategies

To mitigate this vulnerability, the recommended immediate step is to update SINEC INS to version V1.0 SP2 Update 6 or later, where this issue is resolved.

Until the update can be applied, restrict local access to the affected system to trusted users only, as the vulnerability requires local attacker privileges.

Additionally, review and limit the use of the cap_dac_override capability on binaries to prevent unauthorized privilege escalation.

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