Tag Archives: Patches

Printer Doom Hack – WSWiR Episode 122

Apple Patches, Kindle XSS, and Doom Printer Hack

If you want to stay current with the Internet “threatscape,” our weekly video can help. It summarizes each week’s top information and network security news in one convenient place. Subscribe today!

Today’s episode covers, Apple and Adobe security updates, a cross-site scripting flaw that affects Kindle users, and an interesting printer hack that allowed an attacker to run doom on a printer. Watch the video for details and see the Reference section below for more info.

Enjoy your weekend!

(Episode Runtime: 5:39

Direct YouTube Link: https://www.youtube.com/watch?v=aZ7-LdlMYHc

Episode References:

Extras:

— Corey Nachreiner, CISSP (@SecAdept)

Old Gmail Leak – WSWiR Episode 121

Patch Day, Home Depot Update, and Gmail Leak

Why go searching for all the week’s information security (infosec) news when you can find it in one convenient place. This weekly vlog summarizes the important security updates, hacks, and threats so you can protect yourself.

This week’s episode arrives a bit late due to my business travel in Europe. Today’s show covers the week’s Microsoft and Adobe patches, the latest news on the Home Depot breach, and a story about a potentially new (but likely old) Gmail credential leak. Watch the video for the details, and check the references below for more info and some extra stories.

I will be continuing my business travel next week as well. So my weekly post may arrive earlier or later than normal. Have a great day!

(Episode Runtime: 4:53)

Direct YouTube Link: https://www.youtube.com/watch?v=I1GZpvQV6dQ

Episode References:

Extras:

— Corey Nachreiner, CISSP (@SecAdept)

Microsoft Corrects Lync Server and .NET Framework DoS Flaws

Severity: Medium

Summary:

  • These vulnerabilities affect: Lync Server and .NET Framework
  • How an attacker exploits them: Various, including by sending maliciously crafted packets or launching specially crafted calls
  • Impact: An attacker could slow down or disrupt connections to the server, or stop it from responding at all.
  • What to do: Install the appropriate Microsoft patches as soon as possible, or let Windows Automatic Update do it for you.

Exposure:

Today, Microsoft released two security bulletins that fix a pair of Denial of Service (DoS) vulnerabilities in two of their products; Lync Server and the .NET Framework. If you used either of these products, you should update them as soon as you can. We summarize the two DoS bulletins below:

  • MS13-053: .NET Framework DoS Vulnerability

The .NET Framework is a software framework used by developers to create custom Windows and web applications. Though it only ships by default with Windows Vista, you’ll find it on many Windows computers. It suffers from a DoS vulnerability involving the way it handles communications that are hashed. In short, if a remote attacker sends a small amount of specially crafted packets to a server that uses .NET Framework ASP applications, he can cause the server to slow down, and eventually stop responding. If you have any public servers or web applications that use .NET, you should download and install the update as soon as possible.

Microsoft rating: Important

 Lync is a unified communications tool that combines voice, IM, audio, video, and web-based communication into one interface. It’s essentially the replacement for Microsoft Communicator. It suffers from three vulnerabilities, including a DoS flaw involving the way it handles specially crafted calls. By sending a malicious call to your Lync server, a remote attacker can exploit the DoS flaw to cause the Lync Server to stop responding. If you rely on Lync for communications, you should patch your servers as soon as you can.

Microsoft rating: Important

Solution Path:

Microsoft has released patches that correct both these vulnerabilities. You should download, test, and deploy the appropriate updates throughout your network as soon as possible. If you choose, you can also let Windows Update automatically download and install these updates for you.

The links below point directly to the “Affected and Non-Affected Software” section of each bulletin, where you can find all of Microsoft’s update links:

For All WatchGuard Users:

Though you can use your XTM appliance to block the ports necessary for Lync, or use application control to restrict it, this would prevent you from using it externally at all. Right now, Microsoft’s patch are your best solution to these issues.

Status:

Microsoft has released patches correcting these issues.

References:

This alert was researched and written by Corey Nachreiner, CISSP (@SecAdept).


What did you think of this alert? Let us know at your.opinion.matters@watchguard.com.

Microsoft Black Tuesday: Windows, IE, Lync, and .NET Patches

As you may know, today was Microsoft Patch Day. If you manage a Windows-based network, it’s time to get the latest updates.

According to Microsoft’s summary post, the Redmond-based software company released four security bulletins fixing 41 vulnerabilities in many of their popular products. The affected software includes, Windows, Internet Explorer (IE), Lync Server, and the .NET Framework. Microsoft rates the IE update as Critical, and the rest as Important.

As you might guess from the severity ratings, the IE update is the most important. It fixes over 37 security flaws in the popular browser, many of which attackers could use in drive-by download attacks (where just visiting a web site results in malware on your computer). Furthermore, one of the fixes closes a zero day vulnerability that attackers have exploited in the wild. If you use IE, I recommend you apply its update as quickly as your can. You should also install the other updates as well, however, their mitigating factors lessen their risk, so you can install them at your convenience.

In summary, if you use any of the affected products, download, test, and deploy these updates as quickly as you can or let Windows’ Automatic Update do it for you. For the server related updates, I highly recommend you test them before installing them on production servers, as Microsoft has released a few problem causing updates recently. You can find more information about these bulletins and updates in Microsoft’s September Summary advisory.

Also note today is Adobe’s Patch Day as well, and they released one security update fixing 12 vulnerabilities in Flash Player. If you use Flash, you should update it quickly. Adobe also pre-announced a Reader update earlier this month. However, it appears they have had to delay the update for some reason.

I’ll share more details about today’s patches on the blog throughout the day. However, I am traveling internationally, so the updates may not arrive as regularly as usual. If you are in a hurry to patch, I recommend you visit the links above, and start now.  — Corey Nachreiner, CISSP (@SecAdept).

Celeb Selfie Hack – WSWiR Episode 120

Software Patches, Home Depot Breach, and Celebrity Selfie Hack

If you need a quick source for all your information security (infosec) news, you’ve come to the right place. I summarize the most important infosec news in this weekly video, and provide links to other security stories as well.

Unfortunately, today’s episode includes a pretty creepy hack. The show covers next week’s upcoming software patches, another credit card leak that seems to come from Home Depot, and a gross story about hackers stealing hundreds of celebrities’ most private pictures. Find the details in the video below and see what you can learn from these unfortunate cyber attacks.

As always, check the Reference section if you are interested in other stories that I didn’t cover in the video. Also, I will be traveling the next few weeks, which means I may not be able to post this video as regularly as usual. Expect the video to turn up at irregular times, otherwise I may post a written version of the weekly summary instead. Have a great weekend, and stay safe online!

(Episode Runtime: 13:17)

Direct YouTube Link: https://www.youtube.com/watch?v=-mRjltM-tc0&

Episode References:

Extras:

— Corey Nachreiner, CISSP (@SecAdept)

Blackhat and More – WSWiR Episode 116

Blackhat Summary,Lots of Patches, and MonsterMind

Times have changed. Cyber attacks have increased 10-fold, causing a ton of information security (infosec) news each week. Can’t keep up with it all? Let me help out. In this weekly video summary, I highlight the biggest information and security news every week.

Last week, I had meant to post a Black Hat video summary, but simply couldn’t find the time during my two week travel schedule. I try to make up for it in this week’s episode. In today’s video, I share a bit about Black Hat, cover the latest security patches, comment on the alleged huge password theft, and highlight Snowden’s latest interview and disclosures. Watch the video for the details.

Also, don’t forget to check out the big reference section below for two weeks of security news links, and some videos from Black Hat. Have a great weekend.

(Episode Runtime: 9:09)

Direct YouTube Link: https://www.youtube.com/watch?v=Xv1fUT15AP8

Episode References:

Extras:

— Corey Nachreiner, CISSP (@SecAdept)

Office Patches Mend SharePoint and OneNote

Severity: High

Summary:

  • These vulnerabilities affect: Microsoft Office related products like OneNote and SharePoint Server
  • How an attacker exploits them: Varies. Typically by enticing users to open or interact with maliciously crafted Office documents
  • Impact: Many. In the worst case, an attacker can gain complete control of your Windows computer
  • What to do: Install the appropriate Microsoft patches as soon as possible, or let Windows Automatic Update do it for you

Exposure:

Today, Microsoft released two security bulletins that fix a like number of vulnerabilities in OneNote and SharePoint. We summarize these security bulletins below, in order from highest to lowest severity.

  • MS14-048OneNote Code Execution Vulnerability

OneNote is a collaborative, multiuser note taking application that ships with Office. It suffers from an unspecified vulnerability having to do with how it handles specially crafted OneNote files. If an attacker can lure you into opening such a file, she could exploit this flaw to execute code on your computer, with you privileges. As usual, if you are a local administrator, the attacker gains complete control of your PC.

Microsoft rating: Important

  • MS14-050: SharePoint Elevation of Privilege Vulnerability

SharePoint Server is Microsoft’s web and document collaboration and management platform. It suffers from a privilege escalation vulnerability. SharePoint offers an extensibility model that allows you to create apps that can access and use SharePoint resources. However, SharePoint suffers some unspecified flaw that allows specially crafted apps to bypass permission management. In short, by running a specially crafted application, an attacker may be able to access all the SharePoint resources of the currently logged-in user.

Microsoft rating: Important

Solution Path:

Microsoft has released Office and SharePoint-related patches that correct these vulnerabilities. You should download, test, and deploy the appropriate updates throughout your network as soon as possible. If you choose, you can also let Windows Update automatically download and install these updates for you.

Keep in mind, however, that we highly recommend you test updates before running them in your production environment; especially updates for critical production servers.

The links below point directly to the “Affected and Non-Affected Software” section of each bulletin, where you can find all of Microsoft’s update links:

For All WatchGuard Users:

We recommend you install Microsoft’s updates to completely protect yourself from these flaws.

Status:

Microsoft has released patches correcting these issues.

References:

This alert was researched and written by Corey Nachreiner, CISSP (@SecAdept).


What did you think of this alert? Let us know at your.opinion.matters@watchguard.com.

SQL Server Update Fixes XSS and DoS Vulnerability

Severity: Medium

Summary:

  • These vulnerabilities affect: Most current versions of SQL Server
  • How an attacker exploits it: Various, including enticing someone to click a specially crafted link
  • Impact: In the worst case, an attacker can steal your web cookie, hijack your web session, or essentially take any action you could on the SQL server
  • What to do: Deploy the appropriate SQL Server updates as soon as possible

Exposure:

SQL Server is Microsoft’s popular database server. According to Microsoft’s security bulletin, SQL Server suffers from both a Cross-site Scripting (XSS) and Denial of Service (DoS) vulnerability.

The XSS flaw poses the most risk. The SQL Master Data Services (MDS) component suffers from a Cross-site Scripting (XSS) vulnerability due to its inability to properly encode output. By enticing someone to click a specially crafted link, an attacker could leverage this flaw to inject client-side script into that user’s web browser. This could allow the attacker to steal web cookie, hijack the web session, or essentially take any action that user could on your SQL Server’s associated web site. In some cases, attackers can even leverage XSS attacks to hijack your web browser, and gain unauthorized access to your computer.

The DoS flaw poses less risk, but is worth patching too. Essentially, if an attacker can send specially crafted queries to you SQL server, he could lock it up. However, since most administrator block SQL queries from the Internet, the attacker would have to reside on the local network to launch this attack.

Solution Path:

Microsoft has released SQL Server updates  to correct this vulnerability. You should download, test, and deploy the appropriate update as soon as possible. You can find the updates in the “Affected and Non-Affected Software” section of Microsoft’s SQL Server bulletin.

As an aside, the Cross-site Scripting (XSS) protection mechanisms built into many modern web browsers, like Internet Explorer (IE) 8 and above, can often prevent these sorts of attacks. We recommend you enable these mechanisms, if you haven’t already.

For All WatchGuard Users:

Since attackers might exploit some of these attacks locally, we recommend you download, test, and apply the SQL Server patches as quickly as possible.

Status:

Microsoft has released updates to fix this vulnerability.

References:

This alert was researched and written by Corey Nachreiner, CISSP (@SecAdept).


What did you think of this alert? Let us know at your.opinion.matters@watchguard.com.

Windows Updates for Media Center, .NET, and LRPC

Severity: Medium

Summary:

  • These vulnerabilities affect: All current versions of Windows (and related components like .NET Framework)
  • How an attacker exploits them: Multiple vectors of attack, such as enticing you into opening maliciously crafted Office file.
  • Impact: In the worst case, an remote attacker can gain complete control of your Windows computer
  • What to do: Install the appropriate Microsoft patches as soon as possible, or let Windows Automatic Update do it for you

Exposure:

Today, Microsoft released five security bulletins describing seven vulnerabilities in Windows and related components, such as the .NET Framework. A remote attacker could exploit the worst of these flaws to potentially gain complete control of your Windows PC. We recommend you download, test, and deploy these critical updates as quickly as possible.

The summary below lists the vulnerabilities, in order from highest to lowest severity.

  • MS14-043:  Windows Media Center Code Execution Flaw

Windows Media Center is the media player and Digital Video Recording (DVR) application that ships with the popular operating system. MCplayer.dll, a component Media Center uses for audio and video playback, suffers from a “use after free” vulnerability. By tricking you into running a specially crafted Office file, a remote attacker could leverage this flaw to execute code on your computer, with your privileges. If you’re a local adminstrator, the attacker could gain complete control of your machine. Note, this flaw mostly affects the latest versions of Windows.

Microsoft rating: Critical

  • MS14-045:  Multiple Kernel-Mode Driver Elevation of Privilege Vulnerabilities

The kernel is the core component of any computer operating system. Windows also ships with a kernel-mode device driver (win32k.sys), which handles the OS’s device interactions at a kernel level. The Windows kernel-mode driver suffers from three local code execution flaws. The flaws differ technically, but most have to do with the kernel-mode driver improperly handling certain objects, which can result in memory corruptions. Smart attackers can leverage memory corruption flaws to execute code. In a nutshell, if a local attacker can run a specially crafted application, he could leverage most of these flaws to gain complete control of your Windows computers. However, in order to run his malicious program, the attacker first needs to gain local access to your Windows computer, or needs to trick you into running the program yourself, which somewhat lessens the severity of this vulnerability.

Microsoft rating: Important

  • MS14-046:  .NET Framework ASLR Bypass Flaw

The .NET Framework is software framework used by developers to create new Windows and web applications. Address Space Layout Randomization (ASLR) is a memory obfuscation technique that some operating systems use to make it harder for attackers to find specific things in memory, which in turn makes it harder for them to exploit memory corruption flaws. In short, the .NET framework doesn’t use ASLR protection. This means attackers can leverage .NET to bypass Windows’ ASLR protection features. This flaw alone doesn’t allow an attacker to gain access to your Windows computer. Rather, it can help make other memory corruption vulnerabilities easier to exploit. This update fixes the ASLR bypass hole.

Microsoft rating: Important

Local Remote Procedure Call (LRPC) is a protocol Microsoft Windows uses to allow processes to communicate with each other and execute tasks, whether on the same computer or another computer over the network. It suffers from a ASLR bypass vulnerability that has the same scope and impact as the .NET one described above.

Microsoft rating: Important

  • MS14-049:  Windows Installer Service Elevation of Privilege Flaw

As its name suggests, the Windows Installer services is a component that helps you install and configure stuff in Windows. It suffers from a privilege escalation vulnerability involving the way it improperly handles the repair of a previous application. If a local attacker can log into one of your Windows systems and run a specially crafted application, he could exploit this flaw to gain complete control of the system (even if he started out with only Guest privileges). Of course, the attacker would need valid login credentials, which significantly lowers the severity of this issue.

Microsoft rating: Important

Solution Path:

Microsoft has released various updates that correct all of these vulnerabilities. You should download, test, and deploy the appropriate updates throughout your network immediately. If you choose, you can also let Windows Update automatically download and install them for you. As always, you should test your updates before deploying them.

The links below point directly to the “Affected and Non-Affected Software” section of each bulletin, where you can find links to the various updates:

For All WatchGuard Users:

Though WatchGuard’s XTM appliances offer defenses that can mitigate the risk of some of these flaws (such as blocking Office files), attackers can exploit others locally. Since your gateway XTM appliance can’t protect you against local attacks, we recommend you install Microsoft’s updates to completely protect yourself from these flaws.

Status:

Microsoft has released patches correcting these issues.

References:

This alert was researched and written by Corey Nachreiner, CISSP (@SecAdept).


What did you think of this alert? Let us know at your.opinion.matters@watchguard.com.

Nine Microsoft Security Bulletins Coming Tomorrow; Two Critical

Is it just me, or are the months flying by this year? It’s already time for yet another Microsoft Patch Day. According to their advanced notification post for August, Microsoft will release nine security bulletins tomorrow, two with a Critical severity rating. The bulletins will include updates to fix flaws in Windows, Internet Explorer, Office, the .NET Framework, SQL server, and other Microsoft Server Software. You can find a little more color about the upcoming patches at Microsoft’s Security Response Center blog.

In short, if you are a Microsoft administrator, you should prepare yourself for a busy day of patching. I’ll post more details about these updates tomorrow, as they come out. However, I am traveling this week to attend a show, so my posts may not go live as quickly as normal. Be sure to keep you eye on their summary post tomorrow, if you’d like to get the details early. — Corey Nachreiner, CISSP (@SecAdept)

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