Detections
Analytics
Samba 4.3.x < 4.3.13 / 4.4.x < 4.4.8 / 4.5.x < 4.5.3 Multiple Vulnerabilities
high Nessus Network Monitor Plugin ID 9857
Synopsis
The remote host is running a version of Samba server that is affected by multiple vulnerabilities.Description
Versions of Samba 4.3.x prior to 4.3.13, 4.4.x prior to 4.4.8, and 4.5.x prior to 4.5.3 are unpatched, and therefore affected by the following vulnerabilities :- An overflow condition exists in the 'ndr_pull_dnsp_name()' function in 'librpc/ndr/ndr_dnsp.c' that is triggered when handling 'dnsRecord' attributes of DNS objects. With a specially crafted request, an authenticated, remote attacker can cause a heap-based buffer overflow, resulting in a denial of service or potentially allowing the execution of arbitrary code.
- A flaw exists related to the client code always requesting a forwardable Kerberos ticket when performing Kerberos authentication. This may allow a service accepting the 'AP-REQ' from the client to perform the same actions as the client within the Kerberos TGT.
- A flaw exists in the 'check_pac_checksum()' function in 'auth/kerberos/kerberos_pac.c' that is triggered when handling Kerberos PAC (Privilege Attribute Certificate) validation. This may allow an authenticated, remote attacker to corrupt memory and crash the winbindd process.
Solution
Upgrade Samba to version 4.5.3 or later. If version 4.5.x cannot be obtained, versions 4.4.8, and 4.3.13 are also patched for these issues.See Also
https://www.samba.org/samba/history/samba-4.5.3.html
https://www.samba.org/samba/history/samba-4.4.8.html
https://www.samba.org/samba/history/samba-4.3.13.html
https://www.samba.org/samba/ftp/patches/security/samba-4.5.2-security-20016-12-19.patch
https://www.samba.org/samba/ftp/patches/security/samba-4.4.7-security-20016-12-19.patch
https://www.samba.org/samba/ftp/patches/security/samba-4.3.12-security-20016-12-19.patch
Plugin Details
Severity: High
ID: 9857
Family: Samba
Published: 1/9/2017
Updated: 3/6/2019
Nessus ID: 96142
Risk Information
VPR
Risk Factor: Medium
Score: 5.9
CVSS v2
Risk Factor: High
Base Score: 9
Temporal Score: 7.8
Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C
CVSS v3
Risk Factor: High
Base Score: 8.8
Temporal Score: 8.4
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:X/RL:O/RC:C
Vulnerability Information
CPE: cpe:/a:samba:samba
Patch Publication Date: 12/19/2016
Vulnerability Publication Date: 12/19/2016