UBUNTU-CVE-2018-5738
- Source
- https://ubuntu.com/security/CVE-2018-5738
- Import Source
- https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-5738.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2018-5738
- Upstream
- Downstream
- Related
- Published
- 2018-06-12T00:00:00Z
- Modified
- 2025-09-08T16:44:44Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
- 5.3 (Medium) CVSS_V3 - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
- Ubuntu - medium
- Summary
- [none]
- Details
-
Change #4777 (introduced in October 2017) introduced an unforeseen issue in releases which were issued after that date, affecting which clients are permitted to make recursive queries to a BIND nameserver. The intended (and documented) behavior is that if an operator has not specified a value for the "allow-recursion" setting, it SHOULD default to one of the following: none, if "recursion no;" is set in named.conf; a value inherited from the "allow-query-cache" or "allow-query" settings IF "recursion yes;" (the default for that setting) AND match lists are explicitly set for "allow-query-cache" or "allow-query" (see the BIND9 Administrative Reference Manual section 6.2 for more details); or the intended default of "allow-recursion {localhost; localnets;};" if "recursion yes;" is in effect and no values are explicitly set for "allow-query-cache" or "allow-query". However, because of the regression introduced by change #4777, it is possible when "recursion yes;" is in effect and no match list values are provided for "allow-query-cache" or "allow-query" for the setting of "allow-recursion" to inherit a setting of all hosts from the "allow-query" setting default, improperly permitting recursion to all clients. Affects BIND 9.9.12, 9.10.7, 9.11.3, 9.12.0->9.12.1-P2, the development release 9.13.0, and also releases 9.9.12-S1, 9.10.7-S1, 9.11.3-S1, and 9.11.3-S2 from BIND 9 Supported Preview Edition.
- References
Affected packages
Ubuntu:18.04:LTS / bind9
Package
- Name
- bind9
- Purl
- pkg:deb/ubuntu/bind9@1:9.11.3+dfsg-1ubuntu1.1?arch=source&distro=bionic
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed1:9.11.3+dfsg-1ubuntu1.1
Affected versions
1:9.*
Ecosystem specific
{
"availability": "No subscription required",
"binaries": [
{
"binary_version": "1:9.11.3+dfsg-1ubuntu1.1",
"binary_name": "bind9"
},
{
"binary_version": "1:9.11.3+dfsg-1ubuntu1.1",
"binary_name": "bind9-host"
},
{
"binary_version": "1:9.11.3+dfsg-1ubuntu1.1",
"binary_name": "bind9utils"
},
{
"binary_version": "1:9.11.3+dfsg-1ubuntu1.1",
"binary_name": "dnsutils"
},
{
"binary_version": "1:9.11.3+dfsg-1ubuntu1.1",
"binary_name": "libbind-dev"
},
{
"binary_version": "1:9.11.3+dfsg-1ubuntu1.1",
"binary_name": "libbind-export-dev"
},
{
"binary_version": "1:9.11.3+dfsg-1ubuntu1.1",
"binary_name": "libbind9-160"
},
{
"binary_version": "1:9.11.3+dfsg-1ubuntu1.1",
"binary_name": "libdns-export1100"
},
{
"binary_version": "1:9.11.3+dfsg-1ubuntu1.1",
"binary_name": "libdns1100"
},
{
"binary_version": "1:9.11.3+dfsg-1ubuntu1.1",
"binary_name": "libirs-export160"
},
{
"binary_version": "1:9.11.3+dfsg-1ubuntu1.1",
"binary_name": "libirs160"
},
{
"binary_version": "1:9.11.3+dfsg-1ubuntu1.1",
"binary_name": "libisc-export169"
},
{
"binary_version": "1:9.11.3+dfsg-1ubuntu1.1",
"binary_name": "libisc169"
},
{
"binary_version": "1:9.11.3+dfsg-1ubuntu1.1",
"binary_name": "libisccc-export160"
},
{
"binary_version": "1:9.11.3+dfsg-1ubuntu1.1",
"binary_name": "libisccc160"
},
{
"binary_version": "1:9.11.3+dfsg-1ubuntu1.1",
"binary_name": "libisccfg-export160"
},
{
"binary_version": "1:9.11.3+dfsg-1ubuntu1.1",
"binary_name": "libisccfg160"
},
{
"binary_version": "1:9.11.3+dfsg-1ubuntu1.1",
"binary_name": "liblwres160"
}
]
}