Multiple vulnerabilities in Shadowsocks-libev
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2019-5152 CVE-2019-5164 |
| CWE-ID | CWE-200 CWE-306 |
| Exploitation vector | Network |
| Public exploit | Public exploit code for vulnerability #2 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 2 vulnerabilities.
Updated: 30.01.2020
Changed bulletin status to patched.
1) Information disclosure
EUVDB-ID: #VU23394
Risk: Medium
CVSSv3.1: 5.4 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:U/RC:C]
CVE-ID: CVE-2019-5152
CWE-ID:
CWE-200 - Information exposure
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists in the network packet handling functionality when utilizing a Stream Cipher. A remote attacker can send a specially crafted set of network packets, cause an outbound connection from the server and gain unauthorized access to sensitive information on the system.
MitigationInstall update from vendor's website.
Vulnerable software versionsShadowsocks-libev: 3.3.2 - 3.3.3
External linkshttp://www.talosintelligence.com/vulnerability_reports/TALOS-2019-0942
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.
2) Missing Authentication for Critical Function
EUVDB-ID: #VU23393
Risk: High
CVSSv3.1: 8.3 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:U/RC:C]
CVE-ID: CVE-2019-5164
CWE-ID:
CWE-306 - Missing Authentication for Critical Function
Exploit availability: No
Description
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.
Install update from vendor's website.
Vulnerable software versionsShadowsocks-libev: 3.3.2 - 3.3.3
External linkshttp://talosintelligence.com/vulnerability_reports/TALOS-2019-0958
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user 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.
