Posts Tagged: Adobe Flash Player zero-day


12
Jun 18

Microsoft Patch Tuesday, June 2018 Edition

Microsoft today pushed out a bevy of software updates to fix more than four dozen security holes in Windows and related software. Almost a quarter of the vulnerabilities addressed in this month’s patch batch earned Microsoft’s “critical” rating, meaning malware or miscreants can exploit the flaws to break into vulnerable systems without any help from users.

Most of the critical fixes are in Microsoft browsers or browser components. One of the flaws, CVE-2018-8267, was publicly disclosed prior to today’s patch release, meaning attackers may have had a head start figuring out how to exploit the bug to attack Internet Explorer users.

According to Recorded Future, the most important patched vulnerability is a remote code execution vulnerability in the Windows Domain Name System (DNS), which is present in all versions of supported versions of Windows from Windows 7 to Windows 10 as well as all versions of Windows Server from 2008 to 2016.

“The vulnerability allows an attacker to send a maliciously crafted DNS packet to the victim machine from a DNS server, or even send spoofed DNS responses from attack box,” wrote Allan Liska, a threat intelligence analyst at Recorded Future. “Successful exploitation of this vulnerability could allow an attacker to take control of the target machine.”

Security vendor Qualys says mobile workstations that may connect to untrusted Wi-Fi networks are at high risk and this DNS patch should be a priority for them. Qualys also notes that Microsoft this month is shipping updates to mitigate another variant of the Spectre vulnerability in Intel machines.

And of course there are updates available to address the Adobe Flash Player vulnerability that is already being exploited in active attacks. Read more on that here. Continue reading →


7
Jun 18

Adobe Patches Zero-Day Flash Flaw

Adobe has released an emergency update to address a critical security hole in its Flash Player browser plugin that is being actively exploited to deploy malicious software. If you’ve got Flash installed — and if you’re using Google Chrome or a recent version of Microsoft Windows you do — it’s time once again to make sure your copy of Flash is either patched, hobbled or removed.

In an advisory published today, Adobe said it is aware of a report that an exploit for the previously unknown Flash flaw — CVE-2018-5002 — exists in the wild, and “is being used in limited, targeted attacks against Windows users. These attacks leverage Microsoft Office documents with embedded malicious Flash Player content distributed via email.”

The vulnerable versions of Flash include v. 29.0.0.171 and earlier. The version of Flash released today brings the program to v. 30.0.0.113 for Windows, Mac, Linux and Chrome OS. Check out this link to detect the presence of Flash in your browser and the version number installed.

Both Internet Explorer/Edge on Windows 10 and Chrome should automatically prompt users to update Flash when newer versions are available. At the moment, however, I can’t see any signs yet that either Microsoft or Google has pushed out new updates to address the Flash flaw. I’ll update this post if that changes. (Update: June 8, 11:01 a.m. ET: Looks like the browser makers are starting to push this out. You may still need to restart your browser for the update to take effect.)

Adobe credits Chinese security firm Qihoo 360 with reporting the zero-day Flash flaw. Qihoo said in a blog post that the exploit was seen being used to target individuals and companies in Doha, Qatar, and is believed to be related to a nation-state backed cyber-espionage campaign that uses booby-trapped Office documents to deploy malware.

In February 2018, Adobe patched another zero-day Flash flaw that was tied to cyber espionage attacks launched by North Korean hackers. Continue reading →


28
Dec 15

Flash Player Patch Fixes 0-Day, 18 Other Flaws

Adobe has shipped a new version of its Flash Player browser plugin to close at least 19 security holes in the program, including one that is already being exploited in active attacks.

brokenflash-aThe new Flash version, v. 20.0.0.267 for most Mac and Windows users, includes a fix for a vulnerability (CVE-2015-8651) that Adobe says is being used in “limited, targeted attacks.” If you have Flash installed, please update it.

Better yet, get rid of Flash altogether, or at least disable it until and unless you need it. Doing without Flash just makes good security sense, and it isn’t as difficult as you might think: See my post, A Month Without Adobe Flash Player, for tips on how to minimize the risks of having Flash installed.

The most recent versions of Flash should be available from the Flash home page. Windows users who browse the Web with anything other than Internet Explorer may need to apply this patch twice, once with IE and again using the alternative browser (Firefox, Opera, e.g.). This link should tell you whether your system has Flash and if so which version of Flash is installed in your browser.


13
Jul 15

Third Hacking Team Flash Zero-Day Found

For the third time in a week, researchers have discovered a zero-day vulnerability in Adobe’s Flash Player browser plugin. Like the previous two discoveries, this one came to light only after hackers dumped online huge troves of documents stolen from Hacking Team — an Italian security firm that sells software exploits to governments around the world.

News of the latest Flash flaw comes from Trend Micro, which said it reported the bug (CVE-2015-5123) to Adobe’s Security Team. Adobe confirmed that it is working on a patch for the two outstanding zero-day vulnerabilities exposed in the Hacking Team breach.

We are likely to continue to see additional Flash zero day bugs surface as a result of this breach. Instead of waiting for Adobe to fix yet another flaw in Flash, please consider removing or at least hobbling this program.

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Continue reading →


13
Jul 15

Hacking Team Used Spammer Tricks to Resurrect Spy Network

Last week, hacktivists posted online 400 GB worth of internal emails, documents and other data stolen from Hacking Team, an Italian security firm that has earned the ire of privacy and civil liberties groups for selling spy software to governments worldwide. New analysis of the leaked Hacking Team emails suggests that in 2013 the company used techniques perfected by spammers to hijack Internet address space from a spammer-friendly Internet service provider in a bid to regain control over a spy network it apparently had set up for the Italian National Military Police.

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Hacking Team is in the business of selling exploits that allow clients to secretly deploy spyware on targeted systems. In just the past week since the Hacking Team data was leaked, for example, Adobe has fixed two previously undocumented zero-day vulnerabilities in its Flash Player software that Hacking Team had sold to clients as spyware delivery mechanisms.

The spyware deployed by Hacking Team’s exploits are essentially remote-access Trojan horse programs designed to hoover up stored data, recorded communications, keystrokes, etc. from infected devices, giving the malware’s operator full control over victim machines.

Systems infested with Hacking Team’s malware are configured to periodically check for new instructions or updates at a server controlled by Hacking Team and/or its clients. This type of setup is very similar to the way spammers and cybercriminals design “botnets,” huge collections of hacked PCs that are harvested for valuable data and used for a variety of nefarious purposes.

No surprise, then, that Hacking Team placed its control servers in this case at an ISP that was heavily favored by spammers. Leaked Hacking Team emails show that in 2013, the company set up a malware control server for the Special Operations Group of the Italian National Military Police — also known as the “Carabinieri” — an entity focused on investigating organized crime and terrorism. One or both of these organizations chose to position that control at Santrex, a notorious Web hosting provider that at the time served as a virtual haven for spammers and malicious software downloads.

But that decision backfired. As I documented in October 2013, Santrex unexpectedly shut down all of its servers, following a series of internal network issues and extensive downtime. Santrex made that decision after several months of incessant attacks, hacks and equipment failures at its facilities caused massive and costly problems for the ISP and its customers. The company’s connectivity problems essentially made it impossible for either Hacking Team or the Carabinieri to maintain control over the machines infected with the spyware.

According to research published Sunday by OpenDNS Security Labs, around that same time the Carabinieri and Hacking Team cooked up a plan to regain control over the Internet addresses abandoned by Santrex. The plan centered around a traffic redirection technique known as “BGP hijacking,” which involves one ISP fraudulently “announcing” to the rest of the world’s ISPs that it is in fact the rightful custodian of a dormant range of Internet addresses that it doesn’t actually have the right to control.

IP address hijacking is hardly a new phenomenon. Spammers sometimes hijack Internet address ranges that go unused for periods of time (see this story from 2014 and this piece I wrote in 2008 for The Washington Post for examples of spammers hijacking Internet space). Dormant or “unannounced” address ranges are ripe for abuse partly because of the way the global routing system works: Miscreants can “announce” to the rest of the Internet that their hosting facilities are the authorized location for given Internet addresses. If nothing or nobody objects to the change, the Internet address ranges fall into the hands of the hijacker. Continue reading →