Detections
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Scientific Linux Security Update : samba3x on SL5.x i386/x86_64 (20160412) (Badlock)
high Nessus Plugin ID 90501
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Synopsis
The remote Scientific Linux host is missing one or more security updates.Description
Security Fix(es) :- Multiple flaws were found in Samba's DCE/RPC protocol implementation. A remote, authenticated attacker could use these flaws to cause a denial of service against the Samba server (high CPU load or a crash) or, possibly, execute arbitrary code with the permissions of the user running Samba (root). This flaw could also be used to downgrade a secure DCE/RPC connection by a man-in-the-middle attacker taking control of an Active Directory (AD) object and compromising the security of a Samba Active Directory Domain Controller (DC).
(CVE-2015-5370)
Note: While Samba packages as shipped in Scientific Linux do not support running Samba as an AD DC, this flaw applies to all roles Samba implements.
- A protocol flaw, publicly referred to as Badlock, was found in the Security Account Manager Remote Protocol (MS-SAMR) and the Local Security Authority (Domain Policy) Remote Protocol (MS-LSAD). Any authenticated DCE/RPC connection that a client initiates against a server could be used by a man-in-the-middle attacker to impersonate the authenticated user against the SAMR or LSA service on the server. As a result, the attacker would be able to get read/write access to the Security Account Manager database, and use this to reveal all passwords or any other potentially sensitive information in that database. (CVE-2016-2118)
- Several flaws were found in Samba's implementation of NTLMSSP authentication. An unauthenticated, man-in-the-middle attacker could use this flaw to clear the encryption and integrity flags of a connection, causing data to be transmitted in plain text. The attacker could also force the client or server into sending data in plain text even if encryption was explicitly requested for that connection.
(CVE-2016-2110)
- It was discovered that Samba configured as a Domain Controller would establish a secure communication channel with a machine using a spoofed computer name. A remote attacker able to observe network traffic could use this flaw to obtain session-related information about the spoofed machine. (CVE-2016-2111)
- It was found that Samba's LDAP implementation did not enforce integrity protection for LDAP connections. A man-in-the-middle attacker could use this flaw to downgrade LDAP connections to use no integrity protection, allowing them to hijack such connections.
(CVE-2016-2112)
- It was found that Samba did not enable integrity protection for IPC traffic by default. A man-in-the-middle attacker could use this flaw to view and modify the data sent between a Samba server and a client. (CVE-2016-2115)
Solution
Update the affected packages.See Also
Plugin Details
Severity: High
ID: 90501
File Name: sl_20160412_samba3x_on_SL5_x.nasl
Version: 2.13
Type: local
Agent: unix
Published: 4/13/2016
Updated: 1/14/2021
Supported Sensors: Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 5.9
CVSS v2
Risk Factor: Medium
Base Score: 6.8
Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS v3
Risk Factor: High
Base Score: 7.5
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Vulnerability Information
CPE: p-cpe:/a:fermilab:scientific_linux:samba3x, p-cpe:/a:fermilab:scientific_linux:samba3x-client, p-cpe:/a:fermilab:scientific_linux:samba3x-common, p-cpe:/a:fermilab:scientific_linux:samba3x-debuginfo, p-cpe:/a:fermilab:scientific_linux:samba3x-doc, p-cpe:/a:fermilab:scientific_linux:samba3x-domainjoin-gui, p-cpe:/a:fermilab:scientific_linux:samba3x-swat, p-cpe:/a:fermilab:scientific_linux:samba3x-winbind, p-cpe:/a:fermilab:scientific_linux:samba3x-winbind-devel, x-cpe:/o:fermilab:scientific_linux
Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu
Patch Publication Date: 4/12/2016
Vulnerability Publication Date: 4/12/2016
Reference Information
CVE: CVE-2015-5370, CVE-2016-2110, CVE-2016-2111, CVE-2016-2112, CVE-2016-2115, CVE-2016-2118