CVE-2019-14861

Description

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.

Category

5.3
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 3.0 •
CVSS 2.0 •
EPSS 2.68% Top 15%
Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory fedoraproject.org Vendor Advisory opensuse.org Vendor Advisory fedoraproject.org Vendor Advisory gentoo.org Vendor Advisory samba.org
Affected: Red Hat samba
Published at:
Updated at:

References

Link Tags
https://usn.ubuntu.com/4217-1/ third party advisory vendor advisory
https://usn.ubuntu.com/4217-2/ third party advisory vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PJH3ROOFYMOATD2UEPC47P5RPBDTY77E/ vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00038.html mailing list third party advisory vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WNKA4YIPV7AZR7KK3GW6L3HKGHSGJZFE/ vendor advisory
https://security.gentoo.org/glsa/202003-52 third party advisory vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14861 issue tracking third party advisory
https://security.netapp.com/advisory/ntap-20191210-0002/ third party advisory
https://www.samba.org/samba/security/CVE-2019-14861.html vendor advisory
https://www.synology.com/security/advisory/Synology_SA_19_40 third party advisory
https://lists.debian.org/debian-lts-announce/2021/05/msg00023.html third party advisory mailing list
http://www.openwall.com/lists/oss-security/2024/06/24/3 mailing list

Frequently Asked Questions

What is the severity of CVE-2019-14861?
CVE-2019-14861 has been scored as a medium severity vulnerability.
How to fix CVE-2019-14861?
To fix CVE-2019-14861, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-14861 being actively exploited in the wild?
It is possible that CVE-2019-14861 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~3% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2019-14861?
CVE-2019-14861 affects Red Hat samba.
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