Improper restriction of communication channel to intended endpoints in coreDNS



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2022-2835
CWE-ID CWE-923
Exploitation vector Local
Public exploit N/A
Vulnerable software
Subscribe 		CoreDNS
Server applications / DNS servers

Vendor CoreDNS

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Improper restriction of communication channel to intended endpoints

EUVDB-ID: #VU98767

Risk: Low

CVSSv3.1: 3.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-2835

CWE-ID: CWE-923 - Improper Restriction of Communication Channel to Intended Endpoints

Exploit availability: No

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 update from vendor's website.

Vulnerable software versions

CoreDNS: All versions

CPE2.3 External links

http://bugzilla.redhat.com/show_bug.cgi?id=2118542


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.

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.

The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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



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