CVE-2009-2596 in Solaris
Summary
by MITRE
Unspecified vulnerability in the Solaris Auditing subsystem in Sun Solaris 9 and 10 and OpenSolaris before snv_121, when extended file attributes are used, allows local users to cause a denial of service (panic) via vectors related to fad_aupath structure members.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 03/30/2025
The vulnerability described in CVE-2009-2596 resides within the Solaris Auditing subsystem of Oracle Solaris operating systems, specifically affecting versions 9 and 10 along with OpenSolaris before snv_121. This issue represents a critical security flaw that demonstrates how improper handling of extended file attributes can lead to system instability and denial of service conditions. The vulnerability manifests when the auditing subsystem processes file attributes through the fad_aupath structure members, creating a scenario where malicious or unintended input can trigger kernel-level panic conditions.
The technical root cause of this vulnerability lies in inadequate validation and handling of extended file attributes within the auditing framework. When the system encounters certain combinations of extended attributes, particularly those related to the fad_aupath structure, the kernel fails to properly validate input parameters before processing them. This leads to memory corruption or invalid pointer dereferences that ultimately result in system panics. The flaw specifically affects how the auditing subsystem manages path-related structures during attribute processing, creating a condition where local users can exploit this weakness without requiring elevated privileges. According to CWE classification, this vulnerability maps to CWE-125: Out-of-bounds Read, as the system attempts to access memory locations beyond the bounds of allocated structures.
From an operational perspective, this vulnerability poses significant risks to Solaris environments where auditing is enabled and extended file attributes are actively used. Local attackers can exploit this condition to cause system panics, effectively creating a denial of service scenario that disrupts normal system operations and potentially impacts availability for legitimate users. The impact extends beyond simple service disruption as system crashes can lead to data loss, require manual system restarts, and create opportunities for further exploitation. The vulnerability is particularly concerning in enterprise environments where Solaris systems may be running critical applications that depend on continuous availability and where auditing is enabled for compliance purposes.
Mitigation strategies for this vulnerability should focus on immediate patching and system hardening measures. Oracle released security updates for affected Solaris versions that address the improper validation of extended attributes within the auditing subsystem. Organizations should prioritize applying these patches to all affected systems, particularly those running with auditing enabled and using extended file attributes. System administrators should also consider disabling unnecessary auditing features when extended attributes are not required, as this reduces the attack surface. Additional protective measures include implementing proper access controls to limit local user privileges, monitoring for unusual auditing activity patterns, and maintaining regular system backups to ensure rapid recovery from potential panic conditions. The ATT&CK framework categorizes this vulnerability under privilege escalation and denial of service tactics, emphasizing the need for comprehensive security monitoring and response procedures. Organizations should also implement network segmentation and access controls to limit potential exploitation vectors and maintain detailed audit logs to detect any attempted exploitation of this vulnerability.