CVE-2019-14861

Publication date 10 December 2019

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

All Samba versions 4.x.x before 4.9.17, 4.10.x before 4.10.11 and 4.11.x before 4.11.3 have an issue, where the (poorly named) dnsserver RPC pipe provides administrative facilities to modify DNS records and zones. Samba, when acting as an AD DC, stores DNS records in LDAP. In AD, the default permissions on the DNS partition allow creation of new records by authenticated users. This is used for example to allow machines to self-register in DNS. If a DNS record was created that case-insensitively matched the name of the zone, the ldb_qsort() and dns_name_compare() routines could be confused into reading memory prior to the list of DNS entries when responding to DnssrvEnumRecords() or DnssrvEnumRecords2() and so following invalid memory as a pointer.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
samba	19.10 eoan	Fixed 2:4.10.7+dfsg-0ubuntu2.3
	19.04 disco	Fixed 2:4.10.0+dfsg-0ubuntu2.7
	18.04 LTS bionic	Fixed 2:4.7.6+dfsg~ubuntu-0ubuntu2.14
	16.04 LTS xenial	Fixed 2:4.3.11+dfsg-0ubuntu0.16.04.24
	14.04 LTS trusty	Fixed 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm4 Ubuntu Pro

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Severity score breakdown

Parameter	Value
Base score	5.3 · Medium
Attack vector	Network
Attack complexity	High
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

CVE-2019-14861

Cvss 3 Severity Score

Status

Get expanded security coverage with Ubuntu Pro

Severity score breakdown

References

Related Ubuntu Security Notices (USN)

Other references