Vulnerability identifier: #VU11633

Vulnerability risk: Low

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-1099

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
etcd
Server applications / Database software

Vendor: CoreOS

Description
The vulnerability allows a remote unauthenticated attacker to bypass security restrictions on the target system.

The weakness exists due to improper validation of DNS hostnames. A remote attacker can send specially crafted requests, bypass security restrictions and gain network access to internal systems.

Mitigation
Update to version 3.3.2 or later.

Vulnerable software versions

etcd: 2.3.8 - 3.3.1

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External links
http://github.com/coreos/etcd/issues/9353

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.