Missing Authentication for Critical Function in Shadowsocks-libev - CVE-2019-5164

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Main Vulnerability Database Vulnerabilities #VU23393

Missing Authentication for Critical Function in Shadowsocks-libev - CVE-2019-5164

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


Vulnerability identifier: #VU23393
CSH Severity: High
CVSS v4: 8.7 [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]
CVE-ID: CVE-2019-5164
CWE-ID: CWE-306
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

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.


Affected software

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

How to mitigate CVE-2019-5164

Install update 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