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CVE-2023-7008

Systemd-resolved: unsigned name response in signed zone is not refused when dnssec=yes

publishedCWE-300

A vulnerability was found in systemd-resolved. This issue may allow systemd-resolved to accept records of DNSSEC-signed domains even when they have no signature, allowing man-in-the-middles (or the upstream DNS resolver) to manipulate records.

Technical severity5.9 mediumCVSS 3.1 · CNA: redhat
Published2023-12-23Source updated 2026-11-02
Collected2026-11-033 attributed sources

Fixes and workarounds

Workaround

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Source: CNA: redhat

Affected products and versions

ProductVersionsAuthority
Red Hat Enterprise Linux 8
Red Hat
systemd
https://access.redhat.com/downloads/content/package-browser/ 		≥ 0:239-82.el8; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Red Hat Enterprise Linux 9
Red Hat
systemd
https://access.redhat.com/downloads/content/package-browser/ 		≥ 0:252-32.el9_4; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Cryostat 2
Red Hat
systemd
https://access.redhat.com/downloads/content/package-browser/ 		Range not reported
Other versions: unaffected 		CNA: redhat
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
Siemens 		≥ 0; < V1.1 (affected, custom)
Other versions: unknown 		ADP: siemens-SADP

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

NVD applicability configurations (1)

These expressions retain AND/OR operators, negation, and required environmental products. A listed product is not sufficient to establish exposure when additional conditions apply.

[
  {
    "negate": false,
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:systemd_project:systemd:25:*:*:*:*:*:*:*",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      },
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
            "vulnerable": false
          },
          {
            "criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",
            "vulnerable": false
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ],
    "operator": "AND"
  }
]

CVSS assessments

Version / scoreVectorAuthority
3.1 / 5.9
medium		 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:NCNA: redhat
3.1 / 5.9
medium		 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:NNVD: [email protected]
3.1 / 5.9
medium		 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:NNVD: [email protected]

Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

References

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