CVE-2012-1242 in Ichitaro
Summary
by MITRE
Untrusted search path vulnerability in JustSystems Ichitaro 2011 Sou, Ichitaro 2006 through 2011, Ichitaro Government 2006 through 2010, Ichitaro Portable with oreplug, Ichitaro Viewer, JUST School, JUST School 2009 and 2010, JUST Jump 4, JUST Frontier, and oreplug allows local users to gain privileges via a Trojan horse DLL in the current working directory.
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Analysis
by VulDB Data Team • 12/01/2021
This vulnerability represents a classic untrusted search path issue that affects multiple versions of JustSystems Ichitaro software products including various editions from 2006 through 2011. The flaw stems from the application's improper handling of dynamic link library loading mechanisms where the software searches for required libraries in the current working directory before checking system directories. This behavior creates a privilege escalation vector that can be exploited by local attackers who place malicious DLL files in the same directory as the vulnerable applications. The vulnerability is categorized under CWE-427 Untrusted Search Path which specifically addresses the issue of applications searching in insecure locations for dynamic libraries. According to ATT&CK framework, this maps to privilege escalation techniques through DLL hijacking and binary planting methods.
The technical implementation of this vulnerability occurs when a user executes any of the affected Ichitaro applications from a directory containing a malicious DLL file with the same name as a legitimate library that the application expects to load. When the application attempts to load the required DLL, it first searches the current working directory before checking system directories, allowing the attacker's malicious code to be executed with the privileges of the victim user. This type of vulnerability is particularly dangerous because it requires minimal user interaction beyond executing the vulnerable application from a maliciously prepared directory, making it a common target for social engineering attacks. The exploitation is further facilitated by the fact that many of these applications run with elevated privileges or have access to sensitive system resources.
The operational impact of this vulnerability extends beyond simple privilege escalation to potentially enable complete system compromise when combined with other attack vectors. Local attackers who gain access to a user's session can leverage this vulnerability to execute arbitrary code with the privileges of the target user, potentially leading to data exfiltration, system reconnaissance, or further lateral movement within a network. The affected software products are widely used in enterprise environments, particularly in government and educational sectors, making this vulnerability particularly concerning from a security operations perspective. Organizations running these applications are at risk of persistent threats where attackers maintain access through the privilege escalation capability provided by this vulnerability.
Mitigation strategies for this vulnerability should focus on implementing proper application security practices and system hardening measures. Organizations should ensure that all affected applications are updated to versions that properly handle DLL loading by using secure search paths that prioritize system directories over user-controlled locations. System administrators should implement application whitelisting policies to restrict execution of unauthorized DLL files and monitor for suspicious file creation patterns in application directories. The principle of least privilege should be enforced by running these applications with minimal required permissions and by regularly auditing system directories for unauthorized DLL files. Additionally, network segmentation and monitoring solutions should be deployed to detect anomalous behavior that may indicate exploitation attempts. Security awareness training for users should emphasize the importance of not executing applications from untrusted directories and recognizing potential social engineering attempts that might lead to exploitation of this vulnerability.