6.5 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
6.4 Medium
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
45.5%
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.
CPE | Name | Operator | Version |
---|---|---|---|
nlnetlabs:unbound | nlnetlabs unbound | lt | 1.16.2 |
[
{
"vendor": "NLnet Labs",
"product": "Unbound",
"versions": [
{
"version": "unspecified",
"lessThanOrEqual": "1.16.1",
"status": "affected",
"versionType": "custom"
}
]
}
]
lists.debian.org/debian-lts-announce/2023/03/msg00024.html
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5L3ZFWZZFPBIL654BG75RWXUMPFQJ5EC/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D35CX4SCZVNKZTWJXPDFTHWZHINMGEZD/
security.gentoo.org/glsa/202212-02
www.nlnetlabs.nl/downloads/unbound/CVE-2022-30698_CVE-2022-30699.txt
More
6.5 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
6.4 Medium
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
45.5%