According to the versions of the samba packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - A use-after-free flaw was found in all samba LDAP     server versions before 4.10.17, before 4.11.11, before     4.12.4 used in a AC DC configuration. A Samba LDAP user     could use this flaw to crash samba.(CVE-2020-10760)

  - A flaw was found in all Samba versions before 4.10.17,     before 4.11.11 and before 4.12.4 in the way it     processed NetBios over TCP/IP. This flaw allows a     remote attacker could to cause the Samba server to     consume excessive CPU use, resulting in a denial of     service. This highest threat from this vulnerability is     to system availability.(CVE-2020-10745)

  - A NULL pointer dereference, or possible use-after-free     flaw was found in Samba AD LDAP server in versions     before 4.10.17, before 4.11.11 and before 4.12.4.
    Although some versions of Samba shipped with Red Hat     Enterprise Linux do not support Samba in AD mode, the     affected code is shipped with the libldb package. This     flaw allows an authenticated user to possibly trigger a     use-after-free or NULL pointer dereference. The highest     threat from this vulnerability is to system     availability.(CVE-2020-10730)

  - 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)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The Samba Team reports :

Four vulnerabilities were fixed in samba :

- CVE-2020-10730: NULL pointer de-reference and use-after-free in Samba AD DC LDAP Server with ASQ, VLV and paged_results

- CVE-2020-10745: Parsing and packing of NBT and DNS packets can consume excessive CPU in the AD DC (only)

- CVE-2020-10760: LDAP Use-after-free in Samba AD DC Global Catalog with paged_results and VLV

- CVE-2020-14303: Empty UDP packet DoS in Samba AD DC nbtd

Multiple vulnerabilities have been discovered in Samba, a SMB/CIFS file, print, and login server for Unix.

CVE-2020-1472

Unauthenticated domain controller compromise by subverting Netlogon cryptography. This vulnerability includes both ZeroLogon and non-ZeroLogon variations.

CVE-2020-10704

An unauthorized user can trigger a denial of service via a stack overflow in the AD DC LDAP server.

CVE-2020-10730

NULL pointer de-reference and use-after-free in Samba AD DC LDAP Server with ASQ, VLV and paged_results.

CVE-2020-10745

Denial of service resulting from abuse of compression of replies to NetBIOS over TCP/IP name resolution and DNS packets causing excessive CPU load on the Samba AD DC.

CVE-2020-10760

The use of the paged_results or VLV controls against the Global Catalog LDAP server on the AD DC will cause a use-after-free.

CVE-2020-14303

Denial of service resulting from CPU spin and and inability to process further requests once the AD DC NBT server receives an empty (zero-length) UDP packet to port 137.

CVE-2020-14318

Missing handle permissions check in ChangeNotify

CVE-2020-14323

Unprivileged user can crash winbind via invalid lookupsids DoS

CVE-2020-14383

DNS server crash via invalid records resulting from uninitialized variables

For Debian 9 stretch, these problems have been fixed in version 2:4.5.16+dfsg-1+deb9u3.

We recommend that you upgrade your samba packages.

For the detailed security status of samba please refer to its security tracker page at: https://security-tracker.debian.org/tracker/samba

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the samba packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - A flaw was found in the way samba handled file and     directory permissions. An authenticated user could use     this flaw to gain access to certain file and directory     information which otherwise would be unavailable to the     attacker.(CVE-2020-14318)

  - A null pointer dereference flaw was found in samba's     Winbind service in versions before 4.11.15, before     4.12.9 and before 4.13.1. A local user could use this     flaw to crash the winbind service causing denial of     service.(CVE-2020-14323)

  - A flaw was found in samba's DNS server. An     authenticated user could use this flaw to the RPC     server to crash. This RPC server, which also serves     protocols other than dnsserver, will be restarted after     a short delay, but it is easy for an authenticated non     administrative attacker to crash it again as soon as it     returns. The Samba DNS server itself will continue to     operate, but many RPC services will     not.(CVE-2020-14383)

  - A NULL pointer dereference, or possible use-after-free     flaw was found in Samba AD LDAP server in versions     before 4.10.17, before 4.11.11 and before 4.12.4.
    Although some versions of Samba shipped with Red Hat     Enterprise Linux do not support Samba in AD mode, the     affected code is shipped with the libldb package. This     flaw allows an authenticated user to possibly trigger a     use-after-free or NULL pointer dereference. The highest     threat from this vulnerability is to system     availability. (CVE-2020-10730)

  - A flaw was found in all Samba versions before 4.10.17,     before 4.11.11 and before 4.12.4 in the way it     processed NetBios over TCP/IP. This flaw allows a     remote attacker could to cause the Samba server to     consume excessive CPU use, resulting in a denial of     service. This highest threat from this vulnerability is     to system availability. (CVE-2020-10745)

  - A use-after-free flaw was found in all samba LDAP     server versions before 4.10.17, before 4.11.11, before     4.12.4 used in a AC DC configuration. A Samba LDAP user     could use this flaw to crash samba. (CVE-2020-10760)

  - 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)

  - 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)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
142101	EulerOS 2.0 SP5 : samba (EulerOS-SA-2020-2270)	Nessus	Huawei Local Security Checks	2020/10/30	2024/2/13	high
138128	FreeBSD : samba -- Multiple Vulnerabilities (ae599263-bca2-11ea-b78f-b42e99a1b9c3)	Nessus	FreeBSD Local Security Checks	2020/7/6	2024/3/4	high
143186	Debian DLA-2463-1 : samba security update	Nessus	Debian Local Security Checks	2020/11/23	2026/1/12	medium
151396	EulerOS Virtualization 3.0.2.2 : samba (EulerOS-SA-2021-2168)	Nessus	Huawei Local Security Checks	2021/7/6	2026/1/12	medium

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