DEBIAN-CVE-2022-30698

Source
https://security-tracker.debian.org/tracker/CVE-2022-30698
Import Source
https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-30698.json
JSON Data
https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2022-30698
Upstream
Published
2022-08-01T15:15:09Z
Modified
2025-09-19T07:32:19.157325Z
Summary
[none]
Details

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.

References

Affected packages

Debian:11 / unbound

Package

Name
unbound
Purl
pkg:deb/debian/unbound?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.13.1-1+deb11u1

Affected versions

1.*

1.13.1-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Debian:12 / unbound

Package

Name
unbound
Purl
pkg:deb/debian/unbound?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.16.2-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Debian:13 / unbound

Package

Name
unbound
Purl
pkg:deb/debian/unbound?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.16.2-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Debian:14 / unbound

Package

Name
unbound
Purl
pkg:deb/debian/unbound?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.16.2-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}