USN-3956-1

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/notices/USN-3956-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-3956-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-3956-1
Upstream
Related
Published
2019-04-25T13:53:00.573131Z
Modified
2025-09-08T16:36:31Z
Summary
bind9 vulnerability
Details

It was discovered that Bind incorrectly handled limiting the number of simultaneous TCP clients. A remote attacker could possibly use this issue to cause Bind to consume resources, leading to a denial of service.

References

Affected packages

Ubuntu:16.04:LTS / bind9

Package

Name
bind9
Purl
pkg:deb/ubuntu/bind9@1:9.10.3.dfsg.P4-8ubuntu1.14?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1:9.10.3.dfsg.P4-8ubuntu1.14

Affected versions

1:9.*

1:9.9.5.dfsg-11ubuntu1
1:9.9.5.dfsg-12
1:9.9.5.dfsg-12.1
1:9.9.5.dfsg-12.1ubuntu1
1:9.10.3.dfsg.P2-4
1:9.10.3.dfsg.P2-5
1:9.10.3.dfsg.P4-3
1:9.10.3.dfsg.P4-4
1:9.10.3.dfsg.P4-5
1:9.10.3.dfsg.P4-8
1:9.10.3.dfsg.P4-8ubuntu1
1:9.10.3.dfsg.P4-8ubuntu1.1
1:9.10.3.dfsg.P4-8ubuntu1.2
1:9.10.3.dfsg.P4-8ubuntu1.3
1:9.10.3.dfsg.P4-8ubuntu1.4
1:9.10.3.dfsg.P4-8ubuntu1.5
1:9.10.3.dfsg.P4-8ubuntu1.6
1:9.10.3.dfsg.P4-8ubuntu1.7
1:9.10.3.dfsg.P4-8ubuntu1.8
1:9.10.3.dfsg.P4-8ubuntu1.9
1:9.10.3.dfsg.P4-8ubuntu1.10
1:9.10.3.dfsg.P4-8ubuntu1.11
1:9.10.3.dfsg.P4-8ubuntu1.12

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.14",
            "binary_name": "bind9"
        },
        {
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.14",
            "binary_name": "bind9-host"
        },
        {
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.14",
            "binary_name": "bind9utils"
        },
        {
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.14",
            "binary_name": "dnsutils"
        },
        {
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.14",
            "binary_name": "host"
        },
        {
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.14",
            "binary_name": "libbind-dev"
        },
        {
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.14",
            "binary_name": "libbind-export-dev"
        },
        {
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.14",
            "binary_name": "libbind9-140"
        },
        {
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.14",
            "binary_name": "libdns-export162"
        },
        {
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.14",
            "binary_name": "libdns162"
        },
        {
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.14",
            "binary_name": "libirs-export141"
        },
        {
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.14",
            "binary_name": "libirs141"
        },
        {
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.14",
            "binary_name": "libisc-export160"
        },
        {
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.14",
            "binary_name": "libisc160"
        },
        {
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.14",
            "binary_name": "libisccc-export140"
        },
        {
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.14",
            "binary_name": "libisccc140"
        },
        {
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.14",
            "binary_name": "libisccfg-export140"
        },
        {
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.14",
            "binary_name": "libisccfg140"
        },
        {
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.14",
            "binary_name": "liblwres141"
        },
        {
            "binary_version": "1:9.10.3.dfsg.P4-8ubuntu1.14",
            "binary_name": "lwresd"
        }
    ],
    "availability": "No subscription required"
}

Ubuntu:18.04:LTS / bind9

Package

Name
bind9
Purl
pkg:deb/ubuntu/bind9@1:9.11.3+dfsg-1ubuntu1.7?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1:9.11.3+dfsg-1ubuntu1.7

Affected versions

1:9.*

1:9.10.3.dfsg.P4-12.6ubuntu1
1:9.11.2.P1-1ubuntu2
1:9.11.2.P1-1ubuntu3
1:9.11.2.P1-1ubuntu4
1:9.11.2.P1-1ubuntu5
1:9.11.3+dfsg-1ubuntu1
1:9.11.3+dfsg-1ubuntu1.1
1:9.11.3+dfsg-1ubuntu1.2
1:9.11.3+dfsg-1ubuntu1.3
1:9.11.3+dfsg-1ubuntu1.5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1:9.11.3+dfsg-1ubuntu1.7",
            "binary_name": "bind9"
        },
        {
            "binary_version": "1:9.11.3+dfsg-1ubuntu1.7",
            "binary_name": "bind9-host"
        },
        {
            "binary_version": "1:9.11.3+dfsg-1ubuntu1.7",
            "binary_name": "bind9utils"
        },
        {
            "binary_version": "1:9.11.3+dfsg-1ubuntu1.7",
            "binary_name": "dnsutils"
        },
        {
            "binary_version": "1:9.11.3+dfsg-1ubuntu1.7",
            "binary_name": "libbind-dev"
        },
        {
            "binary_version": "1:9.11.3+dfsg-1ubuntu1.7",
            "binary_name": "libbind-export-dev"
        },
        {
            "binary_version": "1:9.11.3+dfsg-1ubuntu1.7",
            "binary_name": "libbind9-160"
        },
        {
            "binary_version": "1:9.11.3+dfsg-1ubuntu1.7",
            "binary_name": "libdns-export1100"
        },
        {
            "binary_version": "1:9.11.3+dfsg-1ubuntu1.7",
            "binary_name": "libdns1100"
        },
        {
            "binary_version": "1:9.11.3+dfsg-1ubuntu1.7",
            "binary_name": "libirs-export160"
        },
        {
            "binary_version": "1:9.11.3+dfsg-1ubuntu1.7",
            "binary_name": "libirs160"
        },
        {
            "binary_version": "1:9.11.3+dfsg-1ubuntu1.7",
            "binary_name": "libisc-export169"
        },
        {
            "binary_version": "1:9.11.3+dfsg-1ubuntu1.7",
            "binary_name": "libisc169"
        },
        {
            "binary_version": "1:9.11.3+dfsg-1ubuntu1.7",
            "binary_name": "libisccc-export160"
        },
        {
            "binary_version": "1:9.11.3+dfsg-1ubuntu1.7",
            "binary_name": "libisccc160"
        },
        {
            "binary_version": "1:9.11.3+dfsg-1ubuntu1.7",
            "binary_name": "libisccfg-export160"
        },
        {
            "binary_version": "1:9.11.3+dfsg-1ubuntu1.7",
            "binary_name": "libisccfg160"
        },
        {
            "binary_version": "1:9.11.3+dfsg-1ubuntu1.7",
            "binary_name": "liblwres160"
        }
    ],
    "availability": "No subscription required"
}