An exploitable information disclosure vulnerability exists in the network packet handling functionality of Shadowsocks-libev 3.3.2. When utilizing a Stream Cipher, a specially crafted set of network packets can cause an outbound connection from the server, resulting in information disclosure. An attacker can send arbitrary packets to trigger this vulnerability.

References

• https://nvd.nist.gov/vuln/detail/CVE-2019-5152
• https://talosintelligence.com/vulnerability_reports/TALOS-2019-0942