#VU74469 Unprotected Alternate Channel in moby - CVE-2023-28842

Vulnerability identifier: #VU74469

Vulnerability risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-28842

CWE-ID: CWE-420

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
moby
Server applications / Virtualization software

Vendor: Moby project

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to unprotected alternate channel within encrypted overlay networks. A remote attacker can inject arbitrary Ethernet frames into the encrypted overlay network by encapsulating them in VXLAN datagrams.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

moby: 1.12.0 - 1.13.1, 18.09.0 - 18.09.9, 19.03.0 - 19.03.15, 20.10.0 - 20.10.23, 23.0.0 - 23.0.2

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External links
https://github.com/moby/moby/security/advisories/GHSA-6wrf-mxfj-pf5p
https://github.com/moby/libnetwork/security/advisories/GHSA-gvm4-2qqg-m333
https://github.com/moby/moby/security/advisories/GHSA-232p-vwff-86mp
https://github.com/moby/moby/security/advisories/GHSA-vwm3-crmr-xfxw
https://github.com/moby/moby/security/advisories/GHSA-33pg-m6jh-5237

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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.