CVE-2012-2653 in arpwatch
Summary
by MITRE
arpwatch 2.1a15, as used by Red Hat, Debian, Fedora, and possibly others, does not properly drop supplementary groups, which might allow attackers to gain root privileges by leveraging other vulnerabilities in the daemon.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 12/31/2024
The vulnerability identified as CVE-2012-2653 affects arpwatch version 2.1a15, a network monitoring tool widely deployed across various Linux distributions including Red Hat, Debian, and Fedora systems. This daemon operates with elevated privileges to monitor and log network address resolution protocol activities, making it a potential target for privilege escalation attacks. The core issue lies in the daemon's improper handling of supplementary group memberships during its execution lifecycle, creating a security flaw that could be exploited by malicious actors.
The technical flaw manifests when arpwatch executes with root privileges but fails to properly drop supplementary groups that are typically associated with the user context from which it was launched. This behavior creates a persistent security risk because the daemon maintains access to group memberships that should be stripped during privilege escalation processes. When combined with other existing vulnerabilities within the arpwatch daemon or its underlying system components, attackers can potentially leverage this group membership persistence to escalate privileges from a regular user account to root access. The vulnerability represents a classic privilege escalation flaw that aligns with CWE-273, which specifically addresses "Improper Check for Dropped Privileges" in software systems.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it creates a persistent backdoor mechanism within network monitoring infrastructure. Systems running affected versions of arpwatch become vulnerable to attacks that exploit the daemon's elevated privileges, potentially allowing attackers to gain unauthorized access to network monitoring data, manipulate network configurations, or establish persistent access to compromised systems. This vulnerability is particularly concerning in enterprise environments where arpwatch is commonly deployed for network security monitoring and intrusion detection purposes, as it undermines the security posture of the entire network infrastructure.
Security practitioners should implement immediate mitigations including updating to patched versions of arpwatch, ensuring proper privilege separation mechanisms are in place, and conducting thorough security assessments of network monitoring tools. The vulnerability demonstrates the importance of proper privilege management in network daemons and aligns with ATT&CK technique T1068 which covers "Exploitation for Privilege Escalation." Organizations should also consider implementing additional monitoring controls to detect suspicious privilege escalation activities and ensure that supplementary group memberships are properly handled during daemon execution. System administrators should verify that the arpwatch daemon is running with minimal required privileges and that all supplementary groups are appropriately dropped during execution to prevent potential exploitation scenarios.