CVE-2019-5163 Denial of service in Shadowsocks
Attackers can crash Shadowsocks-libev by sending arbitrary UDP packets when using Stream Ciphers with a local address, causing service disruption.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2019-5163?
CVE-2019-5163 is a medium-severity denial of service vulnerability in Opensuse Backports, published on 3 Dec 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An exploitable denial-of-service vulnerability exists in the UDPRelay functionality of Shadowsocks-libev 3.3.2. When utilizing a Stream Cipher and a local_address, arbitrary UDP packets can cause a FATAL error code path and exit. An attacker can send arbitrary UDP packets to trigger this vulnerability.
Weakness: CWE-306
Which versions are affected by CVE-2019-5163?
It affects 3 products.
Products include Opensuse Backports, Opensuse Leap, Shadowsocks Shadowsocks-Libev.
How do I fix CVE-2019-5163?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2019-5163 being exploited?
There is no known exploitation of CVE-2019-5163 in the wild and no public exploit code.
Other vulnerabilities in Opensuse Backports
Sources
Also known as DEBIAN-CVE-2019-5163, GHSA-vc3w-rpc8-4w8g, UBUNTU-CVE-2019-5163.