Denial of service in Shadowsocks-libev
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2019-5163 |
| CWE-ID | CWE-306 |
| Exploitation vector | Network |
| Public exploit | Public exploit code for vulnerability #1 is available. |
| Vulnerable software Subscribe |
Shadowsocks-libev Server applications / IDS/IPS systems, Firewalls and proxy servers |
| Vendor | Shadowsocks |
Security Bulletin
This security bulletin contains information about 1 vulnerabilities.
Updated: 30.01.2020
Updated list of affected and fixed versions.
1) Missing Authentication for Critical Function
EUVDB-ID: #VU23392
Risk: Medium
CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C]
CVE-ID: CVE-2019-5163
CWE-ID:
CWE-306 - Missing Authentication for Critical Function
Exploit availability: No
DescriptionThe 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.
MitigationInstall updates from vendor's website.
Vulnerable software versionsShadowsocks-libev: 3.3.2 - 3.3.3
External linkshttp://talosintelligence.com/vulnerability_reports/TALOS-2019-0956
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
