CVE-2022-30698

NLnet Labs Unbound, up to and including version 1.16.1 is vulnerable to a novel type of the "ghost domain names" attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a subdomain of a rogue domain name. The rogue nameserver returns delegation information for the subdomain that updates Unbound's delegation cache. This action can be repeated before expiry of the delegation information by querying Unbound for a second level subdomain which the rogue nameserver provides new delegation information. Since Unbound is a child-centric resolver, the ever-updating child delegation information can keep a rogue domain name resolvable long after revocation. From version 1.16.2 on, Unbound checks the validity of parent delegation records before using cached delegation information.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://lists.debian.org/debian-lts-announce/2023/03/msg00024.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5L3ZFWZZFPBIL654BG75RWXUMPFQJ5EC/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D35CX4SCZVNKZTWJXPDFTHWZHINMGEZD/
https://security.gentoo.org/glsa/202212-02	Third Party Advisory
https://www.nlnetlabs.nl/downloads/unbound/CVE-2022-30698_CVE-2022-30699.txt	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:nlnetlabs:unbound:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR	cpe:2.3:o:fedoraproject:fedora:35:::::::*
	cpe:2.3:o:fedoraproject:fedora:36:::::::*

History

No history.

Information

Published : 2022-08-01 15:15

Updated : 2023-11-07 03:47

NVD link : CVE-2022-30698

Mitre link : CVE-2022-30698

CVE.ORG link : CVE-2022-30698

JSON object : View

Products Affected

nlnetlabs

unbound

fedoraproject

fedora

CWE

CWE-613

Insufficient Session Expiration

{"id": "CVE-2022-30698", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 2.8}]}, "published": "2022-08-01T15:15:09.840", "references": [{"url": "https://lists.debian.org/debian-lts-announce/2023/03/msg00024.html", "source": "sep@nlnetlabs.nl"}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5L3ZFWZZFPBIL654BG75RWXUMPFQJ5EC/", "source": "sep@nlnetlabs.nl"}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D35CX4SCZVNKZTWJXPDFTHWZHINMGEZD/", "source": "sep@nlnetlabs.nl"}, {"url": "https://security.gentoo.org/glsa/202212-02", "tags": ["Third Party Advisory"], "source": "sep@nlnetlabs.nl"}, {"url": "https://www.nlnetlabs.nl/downloads/unbound/CVE-2022-30698_CVE-2022-30699.txt", "tags": ["Vendor Advisory"], "source": "sep@nlnetlabs.nl"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-613"}]}], "descriptions": [{"lang": "en", "value": "NLnet Labs Unbound, up to and including version 1.16.1 is vulnerable to a novel type of the \"ghost domain names\" attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a subdomain of a rogue domain name. The rogue nameserver returns delegation information for the subdomain that updates Unbound's delegation cache. This action can be repeated before expiry of the delegation information by querying Unbound for a second level subdomain which the rogue nameserver provides new delegation information. Since Unbound is a child-centric resolver, the ever-updating child delegation information can keep a rogue domain name resolvable long after revocation. From version 1.16.2 on, Unbound checks the validity of parent delegation records before using cached delegation information."}, {"lang": "es", "value": "NLnet Labs Unbound, versiones hasta 1.16.1 incluy\u00e9ndola, es vulnerable a un nuevo tipo de ataque \"ghost domain names\". La vulnerabilidad funciona al apuntar a una instancia de Unbound. Unbound es consultado por un subdominio de un nombre de dominio falso. El servidor de nombres falso devuelve informaci\u00f3n de delegaci\u00f3n para el subdominio que actualiza la cach\u00e9 de delegaci\u00f3n de Unbound. Esta acci\u00f3n puede repetirse antes de que caduque la informaci\u00f3n de delegaci\u00f3n, consultando a Unbound por un subdominio de segundo nivel al que el servidor de nombres falso proporcione nueva informaci\u00f3n de delegaci\u00f3n. Dado que Unbound es un resolvedor centrado en los hijos, la informaci\u00f3n de delegaci\u00f3n de los hijos, que es actualizada constantemente, puede mantener un nombre de dominio falso resoluble mucho tiempo despu\u00e9s de su revocaci\u00f3n. A partir de la versi\u00f3n 1.16.2, Unbound comprueba la validez de los registros de delegaci\u00f3n padre antes de usar la informaci\u00f3n de delegaci\u00f3n almacenada en cach\u00e9"}], "lastModified": "2023-11-07T03:47:23.907", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:nlnetlabs:unbound:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BB1D0AA5-FEEA-42D2-BBC9-A75F2F508301", "versionEndExcluding": "1.16.2"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "80E516C0-98A4-4ADE-B69F-66A772E2BAAA"}, {"criteria": "cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5C675112-476C-4D7C-BCB9-A2FB2D0BC9FD"}], "operator": "OR"}]}], "sourceIdentifier": "sep@nlnetlabs.nl"}