Please be aware there is a Samba remote code execution vulnerability that has been published today in Metasploit and mass exploitation is likely to follow or be used to self-propagate in the form of a worm.

The vulnerability affects all versions of Samba over the past 7 years, the open source Unix/Linux implementation of the Microsoft File and Print Sharing service, and a patch was released yesterday.

The vulnerability is triggered by connecting to a writeable file share (it can be abused as an anonymous user or with credentials) then uploading a Unix .so shared object file which is then executed on the server.

Many Linux and Unix based operating systems are vulnerable, as are products like NAS (Network Attached Storage) file servers such as Synology, mediacentres and modems etc.

CVE-2017-7494 has been assigned to this issue and reports indicate over 100,000 internet accessible systems are currently vulnerable.
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If you are unable to patch immediately, the vulnerable feature can be disabled by setting the 'nt pipe support = no' directive within the /etc/samba/smb.conf file and restarting the service.

Dear clients,

This is a quick email to alert you about a newly disclosed vulnerability that affects all Microsoft operating systems from Windows 7 to Server 2016.

The vulnerability is present within the Malware Protection engine that runs as the SYSTEM superuser.
The detailed vulnerability report by the Google Security team is now public with proof of concept code. To summarise, the vulnerability results in remote code execution and can be triggered on any system which scans a vulnerability triggering text string or file.
Exploitation scenarios include:

• Exchange receiving an incoming or outgoing email.
• Reading an email on a desktop.
• Visiting a website.
• The malicious file being uploaded to a server (such as Sharepoint, FTP, IIS webserver or network File Share)
• Opening the file or saving it to disk.

Products affected include:

• Microsoft Forefront Endpoint Protection 2010
• Microsoft Endpoint Protection
• Microsoft Forefront Security for SharePoint Service Pack 3
• Microsoft System Center Endpoint Protection
• Microsoft Security Essentials
• Windows Defender for Windows 7
• Windows Defender for Windows 8.1
• Windows Defender for Windows RT 8.1
• Windows Defender for Windows 10, Windows 10 1511, Windows 10 1607, Windows Server 2016, Windows 10 1703
• Windows Intune Endpoint Protection

Microsoft has released Security Update for Microsoft Malware Protection Engine to address this issue.

Ensure the Microsoft Malware Protection Engine is able to receive the latest updates and threat definitions to resolve this issue.
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It is also worth mentioning that another Microsoft vulnerability has been found by the Google Security team which has not yet been made public or patched. The issue is rumoured to affect all versions of Microsoft Windows and is remotely exploitable and wormable and may affect the TCP/IP implementation which would also bypass the Windows firewall.
We will send another alert when details become public.

Dear clients,
We trust you had a relaxing Easter long weekend.
We wanted to let you know that over the break the NSA exploit toolkit for Microsoft was published online which included zero day remote code execution exploits for all modern Microsoft operating systems and popular products.
You can read more about the response and Microsoft Security Updates here: https://blogs.technet.microsoft.com/msrc/2017/04/14/protecting-customers-and-evaluating-risk/
Please note that some remote exploits are not patched by Microsoft, as they affect discontinued products and will remain vulnerable.
An excerpt of the dump includes the following attacks:

• EARLYSHOVEL RedHat 7.0 - 7.1 Sendmail 8.11.x exploit
• EBBISLAND (EBBSHAVE) root RCE via RPC XDR overflow in Solaris 6, 7, 8, 9 & 10 (possibly newer) both SPARC and x86.
• ECHOWRECKER remote Samba 3.0.x Linux exploit.
• EASYBEE appears to be an MDaemon email server vulnerability
• EASYFUN EasyFun 2.2.0 Exploit for WDaemon / IIS MDaemon/WorldClient pre 9.5.6
• EASYPI is an IBM Lotus Notes exploit that gets detected as Stuxnet
• EWOKFRENZY is an exploit for IBM Lotus Domino 6.5.4 & 7.0.2
• EXPLODINGCAN is an IIS 6.0 exploit that creates a remote backdoor
• ETERNALROMANCE is a SMB1 exploit over TCP port 445 which targets XP, 2003, Vista, 7, Windows 8, 2008, 2008 R2, and gives SYSTEM privileges (MS17-010)
• EDUCATEDSCHOLAR is a SMB exploit (MS09-050)
• EMERALDTHREAD is a SMB exploit for Windows XP and Server 2003 (MS10-061)
• EMPHASISMINE is a remote IMAP exploit for IBM Lotus Domino 6.6.4 to 8.5.2
• ENGLISHMANSDENTIST sets Outlook Exchange WebAccess rules to trigger executable code on the client's side to send an email to other users
• EPICHERO 0-day exploit (RCE) for Avaya Call Server
• ERRATICGOPHER is a SMBv1 exploit targeting Windows XP and Server 2003
• ETERNALSYNERGY is a SMBv3 remote code execution flaw for Windows 8 and Server 2012 SP0 (MS17-010)
• ETERNALBLUE is a SMBv2 exploit for Windows 7 SP1 (MS17-010)
• ETERNALCHAMPION is a SMBv1 exploit
• ESKIMOROLL is a Kerberos exploit targeting 2000, 2003, 2008 and 2008 R2 domain controllers
• ESTEEMAUDIT is an RDP exploit and backdoor for Windows Server 2003
• ECLIPSEDWING is an RCE exploit for the Server service in Windows Server 2008 and later (MS08-067)
• ETRE is an exploit for IMail 8.10 to 8.22
• ETCETERABLUE is an exploit for IMail 7.04 to 8.05
• FUZZBUNCH is an exploit framework, similar to MetaSploit
• ODDJOB is an implant builder and C&C server that can deliver exploits for Windows 2000 and later, also not detected by any AV vendors
• EXPIREDPAYCHECK IIS6 exploit
• EAGERLEVER NBT/SMB exploit for Windows NT4.0, 2000, XP SP1 & SP2, 2003 SP1 & Base Release
• EASYFUN WordClient / IIS6.0 exploit
• PASSFREELY utility which "Bypasses authentication for Oracle servers"
• SMBTOUCH check if the target is vulnerable to samba exploits like ETERNALSYNERGY, ETERNALBLUE, ETERNALROMANCE
• ERRATICGOPHERTOUCH Check if the target is running some RPC
• IISTOUCH check if the running IIS version is vulnerable
• RPCOUTCH get info about windows via RPC
• DOPU used to connect to machines exploited by ETERNALCHAMPIONS

We recommend ensuring the patches have been applied and systems rebooted for any of the above products which are accessible over the internet (namely RDP, SMB and IIS for Windows 2003 - 2013 Server).
Alternatively if you'd like to consider our Monthly Managed Penetration Testing Service, we can check vulnerable systems for you.

This is a quick email to bring your attention to a recently publicised OpenSSL security vulnerability known as "Heartbleed". The Common Vulnerabilities and Exposures list has assigned CVE-2014-0160 for this issue.

The vulnerability is currently being exploited in the wild on a small scale.

The vulnerability is a memory disclosure bug. That is, a malicious user can send a trigger packet to an HTTPS service with a vulnerable OpenSSL instance, and the server will respond with the raw memory contents of the HTTP server (such as Apache) or OpenSSL.

Examples include:

1. Revealing the SSL private key, such as .PEM file.
2. Disclosing cached contents of the HTTP/S server, such as username and password sent over SSL to authentication forms.
3. Data stored within the HTTP/S server, such as source code, database connection strings, and information normally only accessible as an authenticated user logged in to the system.
4. Internal memory addressing and security defence mechanisms.

The issue is not only HTTP/S related, but may include other protocols which implement OpenSSL functions (such as SMTP/S, POP3/S etc).  

Am I vulnerable?

Only OpenSSL versions 1.0.1, 1.0.1a through to 1.0.1f are vulnerable. Version 1.0.1 was released March 2012. Version 1.0.1g was released today and is immune (many distributions have not yet released updates, but they should become available within 24 hours). Versions prior to 1.0.1, such as 1.0.0 and the 0.9.x variants do not include this specific vulnerability.

You can check what version you have by running openssl with the version switch:

# openssl version
OpenSSL 1.0.1f 6 Jan 2014 (vulnerable)

This bug is specific to OpenSSL only. Microsoft products may not be affected, however Windows products which utilise OpenSSL may be affected. Most Linux and unix variants utilise OpenSSL. 

It is worth determining what risks this presents to your organisation. As the private key can be compromised and traffic decrypted, consider whether a new private key should be issued and signed by CA (once the server has been patched).