CVE-2023-2847 in Server Security for Linux
Summary
by MITRE • 06/15/2023
During internal security analysis, a local privilege escalation vulnerability has been identified. On a machine with the affected ESET product installed, it was possible for a user with lower privileges due to improper privilege management to trigger actions with root privileges.
ESET remedied this possible attack vector and has prepared new builds of its products that are no longer susceptible to this vulnerability.
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Analysis
by VulDB Data Team • 07/13/2023
This vulnerability represents a critical local privilege escalation flaw within ESET security software products that directly violates fundamental security principles of privilege separation and access control. The issue stems from inadequate privilege management mechanisms within the software installation, allowing unprivileged users to exploit improper privilege handling to execute actions with elevated root privileges. Such a vulnerability fundamentally undermines the security model of the affected system, creating a pathway for attackers to bypass normal access controls and gain unauthorized administrative access. The flaw exists in the privilege delegation logic where the software fails to properly validate or restrict user privileges during specific operational sequences, creating an attack surface that can be exploited by malicious actors with minimal system access.
The technical implementation of this vulnerability likely involves improper privilege elevation during routine software operations or system maintenance tasks. Attackers with standard user privileges can manipulate the software's internal processes to trigger privileged operations without proper authentication or authorization checks. This misconfiguration creates a direct pathway for privilege escalation through mechanisms that should normally require administrative privileges to execute. The vulnerability demonstrates a clear failure in the principle of least privilege, where the software grants unnecessary elevated permissions to processes that should operate with restricted capabilities. This flaw aligns with common weakness patterns described in CWE-276, which addresses improper privilege management, and represents a classic example of insufficient privilege checking in security-critical operations.
The operational impact of this vulnerability extends beyond simple privilege escalation, creating significant risks for enterprise security environments where ESET products are deployed. Organizations with affected software versions face potential compromise of their entire security infrastructure, as attackers can leverage this vulnerability to gain root access and subsequently manipulate security controls, modify system configurations, or establish persistent access. The implications are particularly severe in enterprise environments where ESET products are commonly deployed as endpoint protection solutions, as this vulnerability essentially provides a backdoor for attackers to bypass the very security measures designed to protect the system. The risk assessment for this vulnerability should consider potential lateral movement opportunities, data exfiltration capabilities, and the ability to disable or modify security logging mechanisms that would normally detect such unauthorized access attempts.
Mitigation strategies for this vulnerability must address both immediate remediation and long-term security hardening measures. Organizations should immediately deploy the patched builds provided by ESET to eliminate the exploitation vector, while simultaneously implementing additional monitoring and access control measures to detect potential exploitation attempts. The remediation process should include comprehensive system auditing to identify any potential compromise that may have occurred prior to patch deployment, as well as verification that the updated software properly enforces privilege separation. Security teams should also consider implementing additional controls such as process monitoring, privilege auditing, and endpoint detection and response measures to detect anomalous behavior that might indicate exploitation attempts. This vulnerability highlights the importance of regular security assessments and proper privilege management in security software, aligning with ATT&CK techniques that focus on privilege escalation and persistence mechanisms. Organizations should conduct thorough vulnerability assessments to ensure that similar privilege management issues do not exist in other security tools or system components, as this represents a systemic security weakness that requires comprehensive remediation across the entire security infrastructure.