CVE-2019-5163 : Security Advisory and Response
Learn about CVE-2019-5163, a Medium severity vulnerability in Shadowsocks-libev 3.3.2 allowing denial-of-service attacks via arbitrary UDP packets. Find mitigation steps and long-term security practices.
Shadowsocks-libev version 3.3.2 contains a vulnerability in its UDPRelay feature that can be exploited for denial-of-service attacks. The vulnerability occurs when a Stream Cipher and a local_address are used, allowing arbitrary UDP packets to trigger a FATAL error code path, resulting in program termination.
Understanding CVE-2019-5163
This CVE involves a denial-of-service vulnerability in Shadowsocks-libev version 3.3.2.
What is CVE-2019-5163?
CVE-2019-5163 is a vulnerability in Shadowsocks-libev 3.3.2's UDPRelay feature that enables attackers to launch denial-of-service attacks by sending arbitrary UDP packets.
The Impact of CVE-2019-5163
- CVSS Base Score: 5.9 (Medium)
- Attack Vector: Network
- Attack Complexity: High
- Availability Impact: High
- CWE ID: CWE-306: Missing Authentication for Critical Function
Technical Details of CVE-2019-5163
Shadowsocks-libev version 3.3.2 vulnerability details.
Vulnerability Description
The vulnerability allows arbitrary UDP packets to trigger a FATAL error code path, leading to program termination.
Affected Systems and Versions
- Affected Product: Shadowsocks
- Affected Version: Shadowsocks-libev 3.3.2
Exploitation Mechanism
Attackers exploit the vulnerability by sending arbitrary UDP packets.
Mitigation and Prevention
Protecting systems from CVE-2019-5163.
Immediate Steps to Take
- Update Shadowsocks-libev to a patched version.
- Implement network-level protections to filter out malicious UDP packets.
Long-Term Security Practices
- Regularly update software and apply security patches.
- Conduct security assessments to identify and mitigate vulnerabilities.
Patching and Updates
- Apply patches provided by the software vendor to address the vulnerability.