Missing Authentication for Critical Function in Shadowsocks-libev - CVE-2019-5163

CSH
CYBERSECURITY HELP
Sign In REGISTER
 
Main Vulnerability Database Vulnerabilities #VU23392

Missing Authentication for Critical Function in Shadowsocks-libev - CVE-2019-5163

Published: December 4, 2019 / Updated: January 30, 2020


Vulnerability identifier: #VU23392
CSH Severity: Medium
CVSS v4: 8.2 [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]
CVE-ID: CVE-2019-5163
CWE-ID: CWE-306
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

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.


Affected software

Shadowsocks-libev
shadowsocks-libev (Alpine package)
SUSE Linux
Opensuse

How to mitigate CVE-2019-5163

Install updates from vendor's website.

Shadowsocks-libev - update to 3.3.4
shadowsocks-libev (Alpine package) - update to 3.3.4-r0

External References

Related Security Bulletins