SB2019120415 - Multiple vulnerabilities in Shadowsocks-libev
Published: December 4, 2019 Updated: January 30, 2020
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 vulnerabilities.
1) Information disclosure (CVE-ID: CVE-2019-5152)
CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists in the network packet handling functionality when utilizing a Stream Cipher. A remote attacker can send a specially crafted set of network packets, cause an outbound connection from the server and gain unauthorized access to sensitive information on the system.
2) Missing Authentication for Critical Function (CVE-ID: CVE-2019-5164)
CWE-ID: CWE-306 - Missing Authentication for Critical Function
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to an insufficient authentication mechanism in the ss-manager binary. A remote authenticated attacker can send a specially crafted network packets to ss-manager, cause an arbitrary binary to run and execute arbitrary code on the target system.
Remediation
Install update from vendor's website.