Critical: Red Hat Security Advisory: samba security, bug fix, and enhancement update

An update for samba is now available for Red Hat Gluster Storage 3.1 for RHEL 6 and Red Hat Gluster Storage 3.1 for RHEL 7. Red Hat Product Security has rated this update as having a security impact of Critical. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severit...

Critical: Red Hat Security Advisory: samba4 security, bug fix, and enhancement update

An update for samba4 is now available for Red Hat Enterprise Linux 6.2 Advanced Update Support, Red Hat Enterprise Linux 6.4 Advanced Update Support, Red Hat Enterprise Linux 6.5 Advanced Update Support, and Red Hat Enterprise Linux 6.6 Extended Update Support. Red Hat Product Security has rated...

samba: crash in dcesrv_auth_bind_ack due to missing error check

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. Thi...

samba: Samba based active directory domain controller does not enforce smb signing

It was discovered that Samba did not enforce Server Message Block SMB signing for clients using the SMB1 protocol. A man-in-the-middle attacker could use this flaw to modify traffic between a client and a server...

samba: crash in dcesrv_auth_bind_ack due to missing error check

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. Thi...

samba: crash in dcesrv_auth_bind_ack due to missing error check

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. Thi...

samba: crash in dcesrv_auth_bind_ack due to missing error check

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. Thi...

Badlock Windows, Samba Man-in-the-Middle Vulnerability

Weeks of anxiety and concern over the Badlock vulnerability ended today with an anticlimactic thud. Badlock was the security boogeyman since the appearance three weeks ago of a website and logo branding the bug as something serious in Samba, an open source implementation of the server message blo...

Man in the middle attacks possible with NTLMSSP

Description There are several man in the middle attacks possible with NTLMSSP authentication. E.g. NTLMSSPNEGOTIATESIGN and NTLMSSPNEGOTIATESEAL can be cleared by a man in the middle. This was by protocol design in earlier Windows versions. Windows Server 2003 RTM and Vista RTM introduced a way t...

SAMR and LSA man in the middle attacks possible

The Security Account Manager Remote Protocol MS-SAMR and the Local Security Authority Domain Policy Remote Protocol MS-LSAD are both vulnerable to man in the middle attacks. Both are application level protocols based on the generic DCE 1.1 Remote Procedure Call DCERPC protocol. These protocols ar...

Multiple errors in DCE-RPC code.

Description Versions of Samba from 3.6.0 to 4.4.0 inclusive are vulnerable to denial of service attacks crashes and high cpu consumption in the DCE-RPC client and server implementations. In addition, errors in validation of the DCE-RPC packets can lead to a downgrade of a secure connection to an...

"server signing = mandatory" not enforced

Description Due to a regression introduced in Samba 4.0.0, an explicit "server signing = mandatory" in the global section of the smb.conf was not enforced for clients using the SMB1 protocol. As a result it does not enforce smb signing and allows man in the middle attacks. This problem applies to...

LDAP Based Active Directory Enumeration: AD-LDAP-Enum

ad-ldap-enum is a Python script that was developed to discover users and their group memberships from Active Directory. In large Active Directory environments, tools such as NBTEnum were not performing fast enough. By executing LDAP queries against a domain controller, ad-ldap-enum is able to...

McAfee Security Information and Event Management 9.3.x < 9.3.2.19 / 9.4.x < 9.4.2.9 / 9.5.x < 9.5.0.8 Authentication Bypass (SB10137)

According to its self-reported version, the McAfee Security Information and Event Management SIEM application installed on the remote host is 9.3.x prior to 9.3.2.19, 9.4.x prior to 9.4.2.9, or 9.5.x prior to 9.5.0.8. It is therefore, affected by an authentication bypass vulnerability in the...

How to Use sAMAccountName and userPrincipalName at Same Time for User Logon with Active Directory

This article describes how use sAMAccountName and userPrincipalName at same time for user logon with Active Directory. Background While authenticating with LDAP for NetScaler Gateway or any other resource behind the NetScaler, we can only access resources using either 'domain\username' or...

DEBIAN-CVE-2016-0771

The internal DNS server in Samba 4.x before 4.1.23, 4.2.x before 4.2.9, 4.3.x before 4.3.6, and 4.4.x before 4.4.0rc4, when an AD DC is configured, allows remote authenticated users to cause a denial of service out-of-bounds read or possibly obtain sensitive information from process memory by...

UBUNTU-CVE-2016-0771

The internal DNS server in Samba 4.x before 4.1.23, 4.2.x before 4.2.9, 4.3.x before 4.3.6, and 4.4.x before 4.4.0rc4, when an AD DC is configured, allows remote authenticated users to cause a denial of service out-of-bounds read or possibly obtain sensitive information from process memory by...

Active Directory Honeytoken Tripwire: DCEPT

DCEPT D omain C ontroller E nticing P assword T ripwire is a honeytoken-based tripwire for Microsoft’s Active Directory. Honeytokens are pieces of information intentionally littered on system so they can be discovered by an intruder. In the case of DCEPT, the honeytokens are credentials that woul...

VMware ESX / ESXi Multiple Vulnerabilities (VMSA-2011-0007) (remote check)

The remote VMware ESX / ESXi host is missing a security-related patch. It is, therefore, affected by multiple vulnerabilities : - Multiple forgery vulnerabilities exist in the bundled version of MIT Kerberos 5 krb5. An attacker can exploit these issues to impersonate a client, escalate privileges...

The vulnerability of the Windows operating system, which allows a perpetrator to trigger a service failure

The vulnerability of the authentication mechanism based on forms in the ADFS component of the Windows operating system exists due to insufficient validation of input data. Exploiting this vulnerability can allow a malicious actor, operating remotely, to cause service failures using specially...