Debian LTS: Security Advisory for samba (DLA-2463-1)

Published: 2020-11-23 04:00:28
CVE Author: NIST National Vulnerability Database

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

Summary:
The remote host is missing an update for the 'samba' Linux Distribution Package(s) announced via the DLA-2463-1 advisory.

Detection Method:
Checks if a vulnerable Linux Distribution Package version is present on the target host.

Technical Details:
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

Affected Versions:
'samba' Linux Distribution Package(s) on Debian Linux.

Recommendations:
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 Linux Distribution Packages.

Solution Type:
Vendor Patch

Detection Type:
Linux Distribution Package

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2020-10704
https://nvd.nist.gov/vuln/detail/CVE-2020-10730
https://nvd.nist.gov/vuln/detail/CVE-2020-10745
https://nvd.nist.gov/vuln/detail/CVE-2020-10760
https://nvd.nist.gov/vuln/detail/CVE-2020-14303
https://nvd.nist.gov/vuln/detail/CVE-2020-14318
https://nvd.nist.gov/vuln/detail/CVE-2020-14323
https://nvd.nist.gov/vuln/detail/CVE-2020-14383
https://nvd.nist.gov/vuln/detail/CVE-2020-1472

References:

https://lists.debian.org/debian-lts-announce/2020/11/msg00041.html
https://security-tracker.debian.org/tracker/DLA-2463-1

Severity
High
CVSS Score
9.3
Published
2020-11-23
Modified
2020-11-23
Category
Debian Local Security Checks

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