#VU98767 Improper restriction of communication channel to intended endpoints in CoreDNS - CVE-2022-2835

Vulnerability identifier: #VU98767

Vulnerability risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-2835

CWE-ID: CWE-923

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
CoreDNS
Server applications / DNS servers

Vendor: CoreDNS

Description

The vulnerability allows a local user to reroute internal calls to some internal services.

The vulnerability exists due to excessive data output by the application. A local user can reroute internal calls to some internal services that were accessed by the FQDN in a format of ..svc.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

CoreDNS: All versions

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External links
https://bugzilla.redhat.com/show_bug.cgi?id=2118542

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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