Monday, August 6, 2018

The Spectre Looms Over Us Still

The Spectre attack has been an unexpected danger to our security since January of this year. It’s an attack on most modern processors that use speculative execution to leak sensitive information to a potential attacker. Speculative execution allows processors to execute instructions in parallel, and in cases where instructions are dependent upon the results of other instructions, tries to predict which instructions are likely to take place. When there are hundreds of instructions to run, predictions provide a significant gain in performance. The Spectre attack starts by miss training the processor with processes that will cause erroneous speculative executions which also create covert side channels for exfiltration. Then the attacker has the victim perform an action that usually is allowed and requests sensitive information. Permissions are not checked until the instructions are committed so it has no problem reading the sensitive information and modifying the cache state in a vulnerable way. The attacker then retrieves that information despite the erroneous instructions being discarded.

Researchers at University of California, Riverside (UCR) have discovered a new form of the attack named SpectreRSB that uses the Return Stack Buffer (RSB) instead of the Branch target Buffer to acquire and smuggle sensitive information. Instead of causing the Branch Predictor to miss speculate onto a poisoned branch, SpectreRSB poisons the return address of the RSB. 

Intel already has a patch but only on the Core-i7 Skylake and later processors. The patch is called RSB refilling and it fills the RSB with a benign address whenever there is a switch to the Kernel. Some of the proposed attacks in the UCR paper can bypass RSB refilling, but the researchers believe their proof of concept attacks are unlikely to be practical because of the difficulty in implementing the gadget that smuggles the return address to a recoverable cache. 
Sources: 
https://securityaffairs.co/wordpress/74698/hacking/spectrersb-attack.htmlhttps://arxiv.org/pdf/1807.07940.pdfhttps://www.bleepingcomputer.com/news/security/researchers-detail-newcpu-side-channel-attack-named-spectrersb/

More Vulnerabilities in the Smart Home

Researchers at Cisco Talos recently spent some time probing the Samsung SmartThings Hub, a device designed to be the center of your smart home. They discovered a number of vulnerabilities that allow remote information leakage up to arbitrary remote code execution. The device is designed to communicate with a range of devices over Ethernet, Z-Wave, Bluetooth, and Zigbee. These devices could be smart locks, IP cameras, alarm systems, thermostats and more.

The researchers found a total of 20 vulnerabilities in the hub. They noted that while each of the vulnerabilities by themselves might not have a great impact on the security of the device, in many cases the vulnerabilities can be chained together to form a complete exploit. Three vulnerability chains were identified that allows an attacker to have complete control over the device.

The first chain allows for remote code execution on the hub. By using a vulnerability that allows for the execution of arbitrary SQL queries an attacker would be able to trigger a different vulnerability that allows for memory corruption. Specially crafted queries would allow the attacker to execute arbitrary code via this attack vector. The second chain allows the attacker to get a glance inside the ‘hubCore’ process of the device, leaking sensitive information. This is accomplished via a vulnerability that allows an empty file to be created anywhere on the device. While at first glance this vulnerability doesn’t seem impactful, the researchers learned that creating this empty file in a specific location causes the ‘hubCore’ process to crash and create a memory dump.
 
The third vulnerability in this chain allows for the capture of this information over the network. The last of the 3 chains allows for remote code execution with no prior authentication. This chain relies on sending specially crafted queries to the ‘video-core’ process running on the device. A vulnerability in the HTTP pipeline allows the requests to reach the vulnerable service with an arbitrary payload that triggers a buffer overflow, allowing for remote code execution. While the third exploit chain requires no authentication, the first two have varying requirements depending on a number of factors. In some cases anyone holding a valid OAuth bearer token can talk to the remote servers in order to trigger some of the vulnerabilities. Malicious apps designed for the hub can also be used to trigger the exploits.
Cisco Talos reported all the found vulnerabilities to Samsung. Samsung responded by fixing the bugs and pushing a firmware update to all connected SmartThings Hubs. While the hubs are designed to update automatically, it is always a good idea to verify the firmware version currently running and update manually if necessary.

Sources: 

https://blog.talosintelligence.com/2018/07/samsung-smartthings-vulns.htmlhttps://www.csoonline.com/article/3292942/security/researchers-reveal-20vulnerabilities-in-samsung-smartthings-hub.html

 https://www.securityweek.com/samsung-patches-critical-vulnerabilitiessmartthings-hub 

Tuesday, July 31, 2018

Idaho prison officials: Inmates hacked system to get credits

BOISE, Idaho (AP) — Idaho prison officials say 364 inmates exploited vulnerable software in the JPay tablets they use for email, music and games to collectively transfer nearly a quarter million dollars into their own accounts.

Here the link to the story https://apnews.com/dfd5dccdf75c4b5dbc97ff5ecf3f3d5b, this show where this a way people will find it and use it to their own  ends

Wednesday, July 25, 2018

Ransomware


No More Ransomware Web Site
https://www.nomoreransom.org/en/index.html is a site you should save in your favorite.

This site has lost of resources to help you deal with ransomware.

Ransomware is malware that locks your computer and mobile devices or encrypts your electronic files. When this happens, you can’t get to the data unless you pay a ransom. However, this is not guaranteed, and you should try this site for a solution 1st.

The site has Crypto Sheriff an upload page where you can submit a file and the site may give you a solution on how to remove the ransomware Part of the site has solution for many types of ransomware.

How to prevent a ransomware attack?

1. Back-up! Back-up! Back-up! Have a recovery system in place so a ransomware infection can’t destroy your personal data forever. It’s best to create two back-up copies: one to be stored in the cloud (remember to use a service that makes an automatic backup of your files) and one to store physically (portable hard drive, thumb drive, extra laptop, etc.). Disconnect these from your computer when you are done. Your back up copies will also come in handy should you accidentally delete a critical file or experience a hard drive failure.

2. Use robust antivirus software to protect your system from ransomware. Do not switch off the ‘heuristic functions’ as these help the solution to catch samples of ransomware that have not yet been formally detected.

3. Keep all the software on your computer up to date. When your operating system (OS) or applications release a new version, install it. And if the software offers the option of automatic updating, take it.

4. Trust no one. Literally. Any account can be compromised, and malicious links can be sent from the accounts of friends on social media, colleagues or an online gaming partner. Never open attachments in emails from someone you don’t know. Cybercriminals often distribute fake email messages that look very much like email notifications from an online store, a bank, the police, a court or a tax collection agency, luring recipients into clicking on a malicious link and releasing the malware into their system.

5. Enable the ‘Show file extensions’ option in the Windows settings on your computer. This will make it much easier to spot potentially malicious files. Stay away from file extensions like ‘.exe’, ‘.vbs’ and ‘.scr’. Scammers can use several extensions to disguise a malicious file as a video, photo, or document (like hot-chics.avi.exe or doc.scr).

6. If you discover a rogue or unknown process on your machine, disconnect it immediately from the internet or other network connections (such as home Wi-Fi) — this will prevent the infection from spreading.

Other resources

If you are a member of InfraGard look at the resource here as well.



 

Tuesday, July 24, 2018

Apache Releases Security Updates for Apache Tomcat

The Apache Software Foundation has released security updates to address vulnerabilities in Apache Tomcat versions 9.0.0.M9 to 9.0.9, 8.5.0 to 8.5.31, 8.0.0.RC1 to 8.0.51, and 7.0.28 to 7.0.86. A remote attacker could exploit one of these vulnerabilities to obtain sensitive information.

NCCIC encourages users and administrators to review the Apache security advisories for CVE-2018-8037 and CVE-2018-1336 and apply the necessary updates

Bluetooth Vulnerability

  Bluetooth implementations may not sufficiently validate elliptic curve parameters during Diffie-Hellman key exchange.

Overview


Bluetooth firmware or operating system software drivers may not sufficiently validate elliptic curve parameters used to generate public keys during a Diffie-Hellman key exchange, which may allow a remote attacker to obtain the encryption key used by the device.

Description


CWE-325: Missing Required Cryptographic Step - CVE-2018-5383
Bluetooth utilizes a device pairing mechanism based on elliptic-curve Diffie-Hellman (ECDH) key exchange to allow encrypted communication between devices. The ECDH key pair consists of a private and a public key, and the public keys are exchanged to produce a shared pairing key. The devices must also agree on the elliptic curve parameters being used. Previous work on the "Invalid Curve Attack" showed that the ECDH parameters are not always validated before being used in computing the resulted shared key, which reduces attacker effort to obtain the private key of the device under attack if the implementation does not validate all of the parameters before computing the shared key.

In some implementations, the elliptic curve parameters are not all validated by the cryptographic algorithm implementation, which may allow a remote attacker within wireless range to inject an invalid public key to determine the session key with high probability. Such an attacker can then passively intercept and decrypt all device messages, and/or forge and inject malicious messages.

Both Bluetooth low energy (LE) implementations of Secure Connections Pairing in operating system software and BR/EDR implementations of Secure Simple Pairing in device firmware may be affected. Bluetooth device users are encouraged to consult with their device vendor for further information.

Since the vulnerability was identified, the Bluetooth SIG has updated the Bluetooth specifications to require validation of any public key received as
part of public key-based security procedures, thereby providing a remedy to the vulnerability from a specification perspective. In addition, the Bluetooth SIG has added testing for this vulnerability within its Bluetooth Qualification Program.  The Bluetooth SIG has also released a public statement regarding the vulnerability.

Impact

An unauthenticated, remote attacker within range may be able to utilize a man-in-the-middle network position to determine the cryptographic keys used by the device. The attacker can then intercept and decrypt and/or forge and inject device messages.

Solution


Apply an update

Both software and firmware updates are expected over the coming weeks. Affected users should check with their device vendor for availability of updates.

Vendor Information


VendorStatusDate NotifiedDate Updated
AppleAffected18 Jan 201823 Jul 2018
BroadcomAffected18 Jan 201819 Jun 2018
IntelAffected18 Jan 201823 Jul 2018
QUALCOMM IncorporatedAffected18 Jan 201806 Feb 2018
MicrosoftNot Affected06 Feb 201820 Jul 2018
Android Open Source ProjectUnknown18 Jan 201818 Jan 2018
Bluetooth SIGUnknown06 Feb 201806 Feb 2018
GoogleUnknown19 Mar 201819 Mar 2018
Linux KernelUnknown05 Mar 201805 Mar 2018

Saturday, July 14, 2018

Another type of phishing attack

Phishing is the attempt to acquire sensitive information such as usernames, passwords, and credit card details (and sometimes, indirectly, money), often for malicious reasons, by masquerading as a trustworthy entity in an electronic communication.

Here a new one that has started to circulate.
__________________________________________

You don't know me and you're thinking why you received this e mail, right?

Well, I actually placed a malware on the porn website and guess what, you visited this web site to have fun (you know what I mean). While you were watching the video, your web browser acted as a RDP (Remote Desktop) and a keylogger which provided me access to your display screen and webcam. Right after that, my software gathered all your contacts from your Messenger, Facebook account, and email account.

What exactly did I do?

I made a split-screen video. First part recorded the video you were viewing (you've got a fine taste haha), and next part recorded your webcam (Yep! It's you doing nasty things!).

What should you do?

Well, I believe, $1900 is a fair price for our little secret. You'll make the payment via Bitcoin to the below address (if you don't know this, search "how to buy bitcoin" in Google).

BTC Address: XXXXXXXXXXXXX
(It is cAsE sensitive, so copy and paste it)

Important:

You have 24 hours in order to make the payment. (I have an unique pixel within this email message, and right now I know that you have read this email). If I don't get the payment, I will send your video to all of your contacts including relatives, coworkers, and so forth. Nonetheless, if I do get paid, I will erase the video immidiately. If you want evidence, reply with "Yes!" and I will send your video recording to your 5 friends. This is a non-negotiable offer, so don't waste my time and yours by replying to this email.
 
______________________________________________
 
FYI i wish they would learn to use a spell checker..
 
ONCE AGAIN,  IF YOU DO NOT KNOW THE SENDER DO NOT OPEN UP
THINK BERFORE YOU CLICK