CVE-2017-15924 : Exploit Details and Defense Strategies

CVE-2017-15924 was published on October 27, 2017, and affects shadowsocks-libev version 3.1.0. The vulnerability allows for command injection through shell metacharacters in certain functions.

Understanding CVE-2017-15924

This CVE involves improper parsing in ss-manager of shadowsocks-libev, leading to command injection via a JSON configuration request.

What is CVE-2017-15924?

The vulnerability in manager.c of ss-manager in shadowsocks-libev 3.1.0 allows for command injection by exploiting shell metacharacters in specific functions.

The Impact of CVE-2017-15924

The vulnerability enables an attacker to execute arbitrary commands by manipulating JSON configuration requests received through UDP traffic.

Technical Details of CVE-2017-15924

The technical aspects of this CVE include:

Vulnerability Description

The issue arises from incorrect interpretation of JSON configuration requests, allowing for command injection through shell metacharacters.

Affected Systems and Versions

Product: shadowsocks-libev
Vendor: N/A
Version: 3.1.0

Exploitation Mechanism

The vulnerability is exploited by sending malicious JSON configuration requests via UDP traffic from 127.0.0.1 to trigger command injection.

Mitigation and Prevention

To address CVE-2017-15924, consider the following steps:

Immediate Steps to Take

Update shadowsocks-libev to a patched version.
Restrict network access to vulnerable services.
Monitor network traffic for suspicious activities.

Long-Term Security Practices

Implement secure coding practices to prevent command injection vulnerabilities.
Regularly update and patch software to address known security issues.

Patching and Updates

Ensure timely installation of security patches and updates for shadowsocks-libev to mitigate the risk of command injection vulnerabilities.