Vulnerability identifier: #VU41650

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-15106

CWE-ID: CWE-399

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
etcd
Server applications / Database software

Vendor: CoreOS

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper management of internal resources with the application, as a large slice causes panic in decodeRecord method. A remote attacker can  forge an extremely large frame size that can unintentionally panic at the expense of any RAFT participant trying to decode the WAL.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

etcd: 3.3.0 - 3.4.9

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External links
http://github.com/etcd-io/etcd/security/advisories/GHSA-p4g4-wgrh-qrg2

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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.