USN-7855-2

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Source
https://ubuntu.com/security/notices/USN-7855-2
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7855-2.json
JSON Data
https://api.osv.dev/v1/vulns/USN-7855-2
Upstream
Related
Published
2025-12-02T13:15:02Z
Modified
2026-02-10T04:50:20Z
Summary
unbound regression
Details

USN-7855-1 fixed vulnerabilities in Unbound. It was discovered that the fix for CVE-2025-11411 was incomplete. This update fixes the problem.

Original advisory details:

Yuxiao Wu, Yunyi Zhang, Baojun Liu, and Haixin Duan discovered that Unbound incorrectly handled certain promiscuous NS RRSets. A remote attacker could possibly use this issue to perform a domain hijack attack.

References

Affected packages

Ubuntu:22.04:LTS / unbound

Package

Name
unbound
Purl
pkg:deb/ubuntu/unbound@1.13.1-1ubuntu5.14?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.13.1-1ubuntu5.14

Affected versions

1.*
1.13.1-1ubuntu1
1.13.1-1ubuntu3
1.13.1-1ubuntu5
1.13.1-1ubuntu5.1
1.13.1-1ubuntu5.2
1.13.1-1ubuntu5.3
1.13.1-1ubuntu5.4
1.13.1-1ubuntu5.5
1.13.1-1ubuntu5.7
1.13.1-1ubuntu5.8
1.13.1-1ubuntu5.10
1.13.1-1ubuntu5.11
1.13.1-1ubuntu5.12
1.13.1-1ubuntu5.13

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "1.13.1-1ubuntu5.14",
            "binary_name": "libunbound-dev"
        },
        {
            "binary_version": "1.13.1-1ubuntu5.14",
            "binary_name": "libunbound8"
        },
        {
            "binary_version": "1.13.1-1ubuntu5.14",
            "binary_name": "python3-unbound"
        },
        {
            "binary_version": "1.13.1-1ubuntu5.14",
            "binary_name": "unbound"
        },
        {
            "binary_version": "1.13.1-1ubuntu5.14",
            "binary_name": "unbound-anchor"
        },
        {
            "binary_version": "1.13.1-1ubuntu5.14",
            "binary_name": "unbound-host"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7855-2.json"
cves_map 
{
    "ecosystem": "Ubuntu:22.04:LTS",
    "cves": [
        {
            "id": "CVE-2025-11411",
            "severity": [
                {
                    "type": "CVSS_V4",
                    "score": "CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:H/E:P"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ]
}

Ubuntu:24.04:LTS / unbound

Package

Name
unbound
Purl
pkg:deb/ubuntu/unbound@1.19.2-1ubuntu3.7?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.19.2-1ubuntu3.7

Affected versions

1.*
1.17.1-2
1.18.0-2ubuntu1
1.18.0-2ubuntu2
1.19.1-1ubuntu1
1.19.2-1ubuntu1
1.19.2-1ubuntu3
1.19.2-1ubuntu3.1
1.19.2-1ubuntu3.2
1.19.2-1ubuntu3.3
1.19.2-1ubuntu3.4
1.19.2-1ubuntu3.5
1.19.2-1ubuntu3.6

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "1.19.2-1ubuntu3.7",
            "binary_name": "libunbound-dev"
        },
        {
            "binary_version": "1.19.2-1ubuntu3.7",
            "binary_name": "libunbound8"
        },
        {
            "binary_version": "1.19.2-1ubuntu3.7",
            "binary_name": "python3-unbound"
        },
        {
            "binary_version": "1.19.2-1ubuntu3.7",
            "binary_name": "unbound"
        },
        {
            "binary_version": "1.19.2-1ubuntu3.7",
            "binary_name": "unbound-anchor"
        },
        {
            "binary_version": "1.19.2-1ubuntu3.7",
            "binary_name": "unbound-host"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7855-2.json"
cves_map 
{
    "ecosystem": "Ubuntu:24.04:LTS",
    "cves": [
        {
            "id": "CVE-2025-11411",
            "severity": [
                {
                    "type": "CVSS_V4",
                    "score": "CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:H/E:P"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ]
}

Ubuntu:25.10 / unbound

Package

Name
unbound
Purl
pkg:deb/ubuntu/unbound@1.22.0-2ubuntu2.2?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.22.0-2ubuntu2.2

Affected versions

1.*
1.22.0-1ubuntu1
1.22.0-2ubuntu1
1.22.0-2ubuntu2
1.22.0-2ubuntu2.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "1.22.0-2ubuntu2.2",
            "binary_name": "libunbound-dev"
        },
        {
            "binary_version": "1.22.0-2ubuntu2.2",
            "binary_name": "libunbound8"
        },
        {
            "binary_version": "1.22.0-2ubuntu2.2",
            "binary_name": "python3-unbound"
        },
        {
            "binary_version": "1.22.0-2ubuntu2.2",
            "binary_name": "unbound"
        },
        {
            "binary_version": "1.22.0-2ubuntu2.2",
            "binary_name": "unbound-anchor"
        },
        {
            "binary_version": "1.22.0-2ubuntu2.2",
            "binary_name": "unbound-host"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7855-2.json"
cves_map 
{
    "ecosystem": "Ubuntu:25.10",
    "cves": [
        {
            "id": "CVE-2025-11411",
            "severity": [
                {
                    "type": "CVSS_V4",
                    "score": "CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:H/E:P"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ]
}