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Test ID:1.3.6.1.4.1.25623.1.1.2.2020.2396
Category:Huawei EulerOS Local Security Checks
Title:Huawei EulerOS: Security Advisory for samba (EulerOS-SA-2020-2396)
Summary:The remote host is missing an update for the Huawei EulerOS; 'samba' package(s) announced via the EulerOS-SA-2020-2396 advisory.
Description:Summary:
The remote host is missing an update for the Huawei EulerOS
'samba' package(s) announced via the EulerOS-SA-2020-2396 advisory.

Vulnerability Insight:
An elevation of privilege vulnerability exists when an attacker establishes a vulnerable Netlogon secure channel connection to a domain controller, using the Netlogon Remote Protocol (MS-NRPC), aka 'Netlogon Elevation of Privilege Vulnerability'.(CVE-2020-1472)

A flaw was found in the AD DC NBT server in all Samba versions before 4.10.17, before 4.11.11 and before 4.12.4. A samba user could send an empty UDP packet to cause the samba server to crash.(CVE-2020-14303)

There is an issue in all samba 4.11.x versions before 4.11.5, all samba 4.10.x versions before 4.10.12 and all samba 4.9.x versions before 4.9.18, where the removal of the right to create or modify a subtree would not automatically be taken away on all domain controllers.(CVE-2019-14902)

All samba versions 4.9.x before 4.9.18, 4.10.x before 4.10.12 and 4.11.x before 4.11.5 have an issue where if it is set with 'log level = 3' (or above) then the string obtained from the client, after a failed character conversion, is printed. Such strings can be provided during the NTLMSSP authentication exchange. In the Samba AD DC in particular, this may cause a long-lived process(such as the RPC server) to terminate. (In the file server case, the most likely target, smbd, operates as process-per-client and so a crash there is harmless).(CVE-2019-14907)

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.(CVE-2019-14861)

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 S4U (MS-SFU) Kerberos delegation model includes a feature allowing for a subset of clients to be opted out of constrained delegation in any way, either S4U2Self or regular Kerberos authentication, by forcing all tickets for these clients to be non-forwardable. In AD this is implemented by a user attribute delegation_not_allowed (aka not-delegated), which translates to disallow-forwardable. However the Samba AD DC does not ...

Description truncated. Please see the references for more information.

Affected Software/OS:
'samba' package(s) on Huawei EulerOS V2.0SP2.

Solution:
Please install the updated package(s).

CVSS Score:
9.3

CVSS Vector:
AV:N/AC:M/Au:N/C:C/I:C/A:C

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2020-1472
CERT/CC vulnerability note: VU#490028
https://www.kb.cert.org/vuls/id/490028
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/H4OTFBL6YDVFH2TBJFJIE4FMHPJEEJK3/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TAPQQZZAT4TG3XVRTAFV2Y3S7OAHFBUP/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ST6X3A2XXYMGD4INR26DQ4FP4QSM753B/
http://packetstormsecurity.com/files/159190/Zerologon-Proof-Of-Concept.html
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1472
http://www.openwall.com/lists/oss-security/2020/09/17/2
SuSE Security Announcement: openSUSE-SU-2020:1513 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00080.html
SuSE Security Announcement: openSUSE-SU-2020:1526 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00086.html
https://usn.ubuntu.com/4510-1/
https://usn.ubuntu.com/4510-2/
https://usn.ubuntu.com/4559-1/
CopyrightCopyright (C) 2020 Greenbone Networks GmbH

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