SB2019120416 - Denial of service in Shadowsocks-libev
Published: December 4, 2019 Updated: January 30, 2020
Security Bulletin ID
SB2019120416
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Missing Authentication for Critical Function (CVE-ID: CVE-2019-5163)
CWE-ID: CWE-306 - Missing Authentication for Critical Function
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Green
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists in the UDPRelay functionality when utilizing a Stream Cipher and a "local_address". A remote attacker can send a specially crafted UDP packets and cause a FATAL error code path and exit.
Remediation
Install update from vendor's website.