Executive Summary

[{'type': 'paragraph', 'content': 'CVE-2026-2864 is a path traversal vulnerability found in the production_ssm and feng_ha_ha/megagao ssm-erp software, specifically in the pictureDelete function of the PictureController.java file.'}, {'type': 'paragraph', 'content': 'The vulnerability occurs because the application does not properly sanitize the input parameter picName, allowing an attacker to manipulate this argument to include directory traversal characters such as "..\\".'}, {'type': 'paragraph', 'content': 'This improper filtering enables an attacker to traverse directories on the server and delete arbitrary files outside the intended directory.'}, {'type': 'paragraph', 'content': 'The attack can be launched remotely via the /pic/delete interface by sending crafted requests that exploit this flaw.'}] [1, 2, 3]

Useful 0 Not Useful 0

Impact Analysis

This vulnerability allows an attacker to delete arbitrary files on the affected server by exploiting the path traversal flaw.

Such unauthorized file deletion can lead to loss of important data, disruption of services, and compromise of system integrity and availability.

Because the attack can be performed remotely without user interaction, it increases the risk of exploitation.

Useful 0 Not Useful 0

Compliance Impact

I don't know

Useful 0 Not Useful 0

Detection Guidance

[{'type': 'paragraph', 'content': 'This vulnerability can be detected by monitoring for HTTP POST requests to the /pic/delete interface that include path traversal patterns in the picName parameter, such as sequences containing "..\\" or "../" which attempt to traverse directories.'}, {'type': 'paragraph', 'content': 'A proof-of-concept exploit involves sending a crafted HTTP POST request with picName=..\\..\\..\\123.txt to the /production_ssm_war_exploded/pic/delete endpoint, which can be used to test if the system is vulnerable.'}, {'type': 'paragraph', 'content': 'Suggested commands to detect exploitation attempts or test the vulnerability include using curl to send such crafted requests:'}, {'type': 'list_item', 'content': 'curl -X POST -d "picName=..\\..\\..\\123.txt" http://<target-host>/production_ssm_war_exploded/pic/delete'}, {'type': 'list_item', 'content': 'curl -X POST -d "picName=../../../../etc/passwd" http://<target-host>/production_ssm_war_exploded/pic/delete'}, {'type': 'paragraph', 'content': 'Additionally, network intrusion detection systems (NIDS) or web application firewalls (WAF) can be configured to alert on requests containing directory traversal patterns in the picName parameter targeting the /pic/delete endpoint.'}] [1, 3]

Useful 0 Not Useful 0

Mitigation Strategies

[{'type': 'paragraph', 'content': 'Currently, no known countermeasures or official patches exist for this vulnerability as the project maintainers have not responded to the issue report.'}, {'type': 'paragraph', 'content': 'Immediate mitigation steps include:'}, {'type': 'list_item', 'content': 'Restrict access to the /pic/delete endpoint to trusted users or internal networks only.'}, {'type': 'list_item', 'content': 'Implement input validation and sanitization at the web server or application firewall level to block requests containing directory traversal sequences such as "..\\" or "../" in the picName parameter.'}, {'type': 'list_item', 'content': 'Monitor logs for suspicious requests attempting directory traversal and respond accordingly.'}, {'type': 'list_item', 'content': 'Consider replacing the vulnerable product with an alternative solution if feasible, as no patches are currently available.'}] [2]

Useful 0 Not Useful 0