MitM attack in systemd

1) Insufficient verification of data authenticity

EUVDB-ID: #VU85658

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-7008

CWE-ID: CWE-345 - Insufficient Verification of Data Authenticity

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a MitM attack.

The vulnerability exists due to systemd-resolved accepts records of DNSSEC-signed domains even when they have no signature. A remote attacker can perform MitM attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

systemd: All versions

External links

http://access.redhat.com/security/cve/CVE-2023-7008
http://bugzilla.redhat.com/show_bug.cgi?id=2222261
http://bugzilla.redhat.com/show_bug.cgi?id=2222672
http://github.com/systemd/systemd/issues/25676

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.