OESA-2022-1836

Source
https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2022-1836
Import Source
https://repo.openeuler.org/security/data/osv/OESA-2022-1836.json
JSON Data
https://api.test.osv.dev/v1/vulns/OESA-2022-1836
Upstream
Published
2022-08-13T11:04:08Z
Modified
2025-08-12T05:13:43.412955Z
Summary
unbound security update
Details

Unbound is a validating, recursive, caching DNS resolver. It is designed to be fast and lean and incorporates modern features based on open standards.To help increase online privacy, Unbound supports DNS-over-TLS which allows clients to encrypt their communication. Unbound is available for most platforms such as FreeBSD, OpenBSD, NetBSD, MacOS, Linux and Microsoft Windows.Unbound is a totally free, open source software under the BSD license. It doesn'tmake custom builds or provide specific features to paying customers only.

Security Fix(es):

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.(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 rogue domain name when the cached delegation information is about to expire. The rogue nameserver delays the response so that the cached delegation information is expired. Upon receiving the delayed answer containing the delegation information, Unbound overwrites the now expired entries. This action can be repeated when the delegation information is about to expire making the rogue delegation information ever-updating. From version 1.16.2 on, Unbound stores the start time for a query and uses that to decide if the cached delegation information can be overwritten.(CVE-2022-30699)

Database specific
{
    "severity": "Medium"
}
References

Affected packages

openEuler:20.03-LTS-SP1 / unbound

Package

Name
unbound
Purl
pkg:rpm/openEuler/unbound&distro=openEuler-20.03-LTS-SP1

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.11.0-7.oe1

Ecosystem specific

{
    "aarch64": [
        "unbound-debugsource-1.11.0-7.oe1.aarch64.rpm",
        "python3-unbound-1.11.0-7.oe1.aarch64.rpm",
        "unbound-debuginfo-1.11.0-7.oe1.aarch64.rpm",
        "unbound-help-1.11.0-7.oe1.aarch64.rpm",
        "unbound-libs-1.11.0-7.oe1.aarch64.rpm",
        "unbound-devel-1.11.0-7.oe1.aarch64.rpm",
        "unbound-1.11.0-7.oe1.aarch64.rpm"
    ],
    "src": [
        "unbound-1.11.0-7.oe1.src.rpm"
    ],
    "x86_64": [
        "unbound-debugsource-1.11.0-7.oe1.x86_64.rpm",
        "python3-unbound-1.11.0-7.oe1.x86_64.rpm",
        "unbound-devel-1.11.0-7.oe1.x86_64.rpm",
        "unbound-1.11.0-7.oe1.x86_64.rpm",
        "unbound-help-1.11.0-7.oe1.x86_64.rpm",
        "unbound-debuginfo-1.11.0-7.oe1.x86_64.rpm",
        "unbound-libs-1.11.0-7.oe1.x86_64.rpm"
    ]
}

openEuler:20.03-LTS-SP3 / unbound

Package

Name
unbound
Purl
pkg:rpm/openEuler/unbound&distro=openEuler-20.03-LTS-SP3

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.11.0-6.oe1

Ecosystem specific

{
    "aarch64": [
        "unbound-help-1.11.0-6.oe1.aarch64.rpm",
        "unbound-1.11.0-6.oe1.aarch64.rpm",
        "unbound-debugsource-1.11.0-6.oe1.aarch64.rpm",
        "python3-unbound-1.11.0-6.oe1.aarch64.rpm",
        "unbound-libs-1.11.0-6.oe1.aarch64.rpm",
        "unbound-devel-1.11.0-6.oe1.aarch64.rpm",
        "unbound-debuginfo-1.11.0-6.oe1.aarch64.rpm"
    ],
    "src": [
        "unbound-1.11.0-6.oe1.src.rpm"
    ],
    "x86_64": [
        "unbound-1.11.0-6.oe1.x86_64.rpm",
        "unbound-libs-1.11.0-6.oe1.x86_64.rpm",
        "python3-unbound-1.11.0-6.oe1.x86_64.rpm",
        "unbound-help-1.11.0-6.oe1.x86_64.rpm",
        "unbound-devel-1.11.0-6.oe1.x86_64.rpm",
        "unbound-debugsource-1.11.0-6.oe1.x86_64.rpm",
        "unbound-debuginfo-1.11.0-6.oe1.x86_64.rpm"
    ]
}

openEuler:22.03-LTS / unbound

Package

Name
unbound
Purl
pkg:rpm/openEuler/unbound&distro=openEuler-22.03-LTS

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.13.2-5.oe2203

Ecosystem specific

{
    "aarch64": [
        "unbound-debuginfo-1.13.2-5.oe2203.aarch64.rpm",
        "unbound-help-1.13.2-5.oe2203.aarch64.rpm",
        "unbound-1.13.2-5.oe2203.aarch64.rpm",
        "unbound-devel-1.13.2-5.oe2203.aarch64.rpm",
        "python3-unbound-1.13.2-5.oe2203.aarch64.rpm",
        "unbound-debugsource-1.13.2-5.oe2203.aarch64.rpm",
        "unbound-libs-1.13.2-5.oe2203.aarch64.rpm"
    ],
    "src": [
        "unbound-1.13.2-5.oe2203.src.rpm"
    ],
    "x86_64": [
        "unbound-debugsource-1.13.2-5.oe2203.x86_64.rpm",
        "unbound-help-1.13.2-5.oe2203.x86_64.rpm",
        "unbound-debuginfo-1.13.2-5.oe2203.x86_64.rpm",
        "unbound-devel-1.13.2-5.oe2203.x86_64.rpm",
        "python3-unbound-1.13.2-5.oe2203.x86_64.rpm",
        "unbound-libs-1.13.2-5.oe2203.x86_64.rpm",
        "unbound-1.13.2-5.oe2203.x86_64.rpm"
    ]
}