Posts Tagged: adobe reader


13
May 14

Adobe, Microsoft Issue Critical Security Fixes

Adobe and Microsoft today each released software updates to plug dangerous security holes in their products. Adobe pushed patches to fix holes in Adobe Acrobat/Reader as well as Flash Player. Microsoft issued eight update bundles to nix at least 13 security vulnerabilities in Windows and software that runs on top of the operating system.

A majority of the patches released by Microsoft are fixes for products that run in enterprise environments. Chief among the consumer-facing Microsoft updates is cumulative patch for Internet Explorer that fixes a pair of flaws in all supported versions of IE. This patch also includes the emergency update that Microsoft released earlier this month to address a zero-day vulnerability in IE. Microsoft also issued fixes for several Office vulnerabilities. This month’s batch also includes a .NET fix, which in my experience is best installed separately.

Adobe released a fix for its Flash Player software that corrects at least six security flaws. The Flash update brings the media player to v. 13.0.0.214 on Windows and Mac systems, and v. 11.2.202.359 for Linux users. To see which version of Flash you have installed, check this linkContinue reading →


14
May 13

Microsoft, Adobe Push Critical Security Updates

Microsoft and Adobe today each released updates to fix critical security holes in their software. Microsoft’s patch batch tackles at least 33 vulnerabilities in Windows and other products, including a fix for a zero-day vulnerability in Internet Explorer 8 that attackers have been exploiting. Separately, Adobe pushed security updates for Flash Player, Adobe Reader, Acrobat and Adobe AIR.

crackedwinMicrosoft’s Patch Tuesday bundle includes two separate updates for Internet Explorer; the first (MS13-037) is a cumulative update for Internet Explorer. The second is a fix (MS13-038) specifically for a critical bug in IE 8 that miscreants and malware have been using to break into Windows computers. Other, slightly less severe holes were fixed in Microsoft Publisher, Word, Visio and Windows Essentials.

Last week, Microsoft released a stopgap “Fix-it” tool to help blunt the threat from the IE8 zero-day flaw. If you installed that interim fix, Microsoft recommends taking a moment to disable it before applying today’s patches.

<soapbox>On a side note..Dear Microsoft: Please stop asking people to install Silverlight every time they visit a Microsoft.com property. I realize that Silverlight is a Microsoft product, but it really is not needed to view information about security updates. In keeping with the principle of reducing the attack surface of an operating system, you should not be foisting additional software on visitors who are coming to you for information on how to fix bugs and vulnerabilities in Microsoft products that they already have installed. </soapbox>

Silverlight required? C'mon, Microsoft!

Silverlight required? C’mon, Microsoft!

As it usually does on Microsoft’s Patch Tuesday, Adobe used the occasion to push its own security updates. A new version of Flash (v. 11.7.700.202 for Mac and Windows systems) fixes 13 vulnerabilities.  IE 10 and Google Chrome automatically update themselves to fix Flash flaws. This link should tell you which version of Flash your browser has installed. If your version of Chrome is not yet updated to v. 11.7.700.202, you may need to just restart the browser.

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8
Apr 13

Phoenix Exploit Kit Author Arrested In Russia?

The creator of a popular crimeware package known as the Phoenix Exploit Kit was arrested in his native Russia for distributing malicious software and for illegally possessing multiple firearms, according to underground forum posts from the malware author himself.

The last version of the Phoenix Exploit Kit. Source: Xylibox.com

The last version of the Phoenix Exploit Kit. Source: Xylibox.com

The Phoenix Exploit Kit is a commercial crimeware tool that until fairly recently was sold by its maker in the underground for a base price of $2,200. It is designed to booby-trap hacked and malicious Web sites so that they foist drive-by downloads on visitors.

Like other exploit packs, Phoenix probes the visitor’s browser for the presence of outdated and insecure versions of browser plugins like Java, and Adobe Flash and Reader. If the visitor is unlucky enough to have fallen behind in applying updates, the exploit kit will silently install malware of the attacker’s choosing on the victim’s PC (Phoenix targets only Microsoft Windows computers).

The author of Phoenix — a hacker who uses the nickname AlexUdakov on several forums — does not appear to have been overly concerned about covering his tracks or hiding his identity. And as we’ll see in a moment, his online persona has been all-too-willing to discuss his current legal situation with former clients and fellow underground denizens.

Exploit.in forum member AlexUdakov selling his Phoenix Exploit Kit.

Exploit.in forum member AlexUdakov selling his Phoenix Exploit Kit.

For example, AlexUdakov was a member of Darkode.com, a fairly exclusive English-language cybercrime forum that I profiled last week. That post revealed that the administrator accounts for Darkode had been compromised in a recent break-in, and that the intruders were able to gain access to private communications of the administrators. That access included authority to view full profiles of Darkode members, as well as the private email addresses of Darkode members.

AlexUdakov registered at Darkode using the address “nrew89@gmail.com”. That email is tied to a profile at Vkontakte.ru (a Russian version of Facebook) for one Andrey Alexandrov, a 23-year-old male (born May 20, 1989) from Yoshkar-Ola, a historic city of about a quarter-million residents situated on the banks of the Malaya Kokshaga river in Russia, about 450 miles east of Moscow.

ASK-74u rifles. Source: Wikimedia Commons.

AKS-74u rifles. Source: Wikimedia Commons.

That nrew89@gmail.com address also is connected to accounts at several Russian-language forums and Web sites dedicated to discussing guns, including talk.guns.ru and popgun.ru. This is interesting because, as I was searching AlexUdakov’s Phoenix Exploit kit sales postings on various cybercrime forums, I came across him discussing guns on one of his sales threads at exploit.in, a semi-exclusive underground forum. There, a user with the nickname AlexUdakov had been selling Phoenix Exploit Kit for many months, until around July 2012, when customers on exploit.in began complaining that he was no longer responding to sales and support requests. Meanwhile, AlexUdakov account remained silent for many months.

Then, in February 2013, AlexUdakov began posting again, explaining his absence by detailing his arrest by the Federal Security Service (FSB), the Russian equivalent of the FBI. The Phoenix Exploit Kit author explained that he was arrested by FSB officers for distributing malware and the illegal possession of firearms, including two AKS-74U assault rifles, a Glock, a TT (Russian-made pistol), and a PM (also known as a Makarov).

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8
Jan 13

Adobe, Microsoft Ship Critical Security Updates

Adobe and Microsoft today separately issued updates to fix critical security vulnerabilities in their products. Adobe pushed out fixes for security issues in Acrobat, Adobe Reader and its Flash Player plugin. Microsoft released seven patches addressing at least a dozen security holes in Windows and other software, although it failed to issue an official patch for a dangerous flaw in its Internet Explorer Web browser that attackers are now actively exploiting.

Two of the patches that Microsoft issued today earned a “critical” rating, signifying that these vulnerabilities could be exploited to fully compromise vulnerable Windows systems without any help from users. Microsoft called special attention to two critical bugs in its XML Core Services component; the company said it is likely that malware or miscreants will figure out a way to exploit these flaws in active attacks sometime within the next 30 days.

Unfortunately, Microsoft did not offer an official fix for a critical Windows flaw that malware and miscreants are already exploiting. In late December, Microsoft acknowledged that attackers were using a previously undocumented security hole in Internet Explorer versions 6 through 8 to break into Windows PCs. Microsoft later issued a stopgap “FixIt” tool to help lessen the vulnerability on affected systems, but researchers last week demonstrated that the FixIt tool only blocked some methods of attacking the flaw, leaving other ways unguarded. Meanwhile, a working copy of the exploit has been folded into Metasploit, a free penetration testing tool.

Wolfgang Kandek, chief technology officer at vulnerability management firm Qualys, said the zero-day IE vulnerability affects 90% of the IE install base at this time.

“Microsoft is not providing a patch today, though they have provided a Fix-It for the issue,” Kandek wrote in a blog post. “The vulnerability should be tracked closely, as a large percentage of enterprises still run the affected versions.”

Users who wish to continue browsing the Web with IE should upgrade to IE9 if possible (IE10 on Windows 8 also is not vulnerable). Users still on Windows XP will not be able to update to IE9, but may be able to derive some protection from the FixIt tool and by using Microsoft’s EMET tool. XP users may be better off, however, browsing with Firefox or Chrome with some type of script blocking and/or sandbox in place. More information on how to use EMET and script blocking options is available in my Tools for a Safer PC primer. More details about today’s updates from Microsoft can be found at the Microsoft Security Response Center blog and in the security bulletin summaries for each patch.

The Adobe Flash patch fixes at least one critical vulnerability in the media player plugin. Updates are available for all supported versions of Flash, including for Windows, Mac, Linux and Android. See the chart below for the latest version number broken down by operating system.

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13
Aug 12

Inside a ‘Reveton’ Ransomware Operation

The U.S Federal Bureau of Investigation is warning about an uptick in online extortion scams that impersonate the FBI and frighten people into paying fines to avoid prosecution for supposedly downloading child pornography and pirated content. This post offers an inside look at one malware gang responsible for orchestrating such scams.

Reveton ransomware scam impersonating FBI

Reveton ransomware scam page impersonating the FBI

In an alert published last week, the FBI said that The Internet Crime Complaint Center — a partnership between the FBI and the National White Collar Crime Center — was “getting inundated with complaints” from consumers targeted or victimized by the scam, which uses drive-by downloads to hijack host machines. The downloaded malware displays a threatening message (see image to the right) and blocks the user from doing anything else unless he pays the fine or finds a way to remove the program.

The FBI alert said the attacks have surged with the help of a “new drive-by virus” called Reveton; in fact, Reveton and its ilk are hardly new. These types of attacks have been around for years, but traditionally have targeted European users. The scam pages used in the attacks mimic official notices from various national police or investigatory agencies, corresponding to the country in which the victim resides. For a breakdown of these Reveton-related ransomware scam pages by country, see this comprehensive gallery set up at botnets.fr.

Reveton.A is blamed in these most recent attacks, and the FBI said it appears Reveton is being distributed in conjunction with Citadel, an offshoot of the ZeuS Trojan that I have written about on several occasions. It is certainly possible that crooks are using Citadel to deploy Reveton, but as I’ll illustrate below, it seems more likely that the attackers in these cases are using exploit kits like BlackHole to plant both threats on victim PCs.

INSIDE A REVETON MALWARE GANG

Operations of one Reveton crime group. Source: ‘Kafeine,’ from botnets.fr.

At least that’s the behavior that’s been observed by a ragtag group of researchers that has been tracking Reveton activity for many months. Some of the researchers are associated with botnets.fr, but they’ve asked to remain nameless because of the sensitivity of their work. One of them, who goes by the screen name “Kafeine,” said much of the Reveton activity traces back to a group that is controlling the operation using reverse proxies at dozens of servers scattered across data centers globally (see this PDF for a more detailed look at the image above).

Kafeine said the groups involved in spreading Reveton are constantly fine-tuning all aspects of their operations, from the scam pages to solidifying their back-end hosting infrastructure. The latest versions of Reveton, for example, serve the scam pages from an encrypted (https://) connection, and only cough up the pages when an infected machine visits and sends a special request. Continue reading →


10
Jan 12

Adobe, Microsoft Issue Critical Security Fixes

Adobe and Microsoft today each issued software fixes to tackle dangerous security flaws in their  products. If you use Acrobat, Adobe Reader or Windows, it’s time to patch.

Microsoft released seven security bulletins addressing at least eight vulnerabilities in Windows. The lone “critical” Microsoft patch addresses a pair of bugs in Windows Media Player. Microsoft warns that attackers could exploit these flaws to break into Windows systems without any help from users; the vulnerability could be triggered just by browsing to a site that hosts specially crafted video content.

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29
Nov 11

Attempted Malvertising on KrebsOnSecurity.com

Members of an exclusive underground hacker forum recently sought to plant malware on KrebsOnSecurity.com, by paying to run tainted advertisements through the site’s advertising network — Federated Media. The attack was unsuccessful thanks to a variety of safeguards, but it highlights the challenges that many organizations face in combating the growing scourge of “malvertising.”

Last week, I listed the various ways this blog and its author has been “honored” over the past few years by the cybercrime community, but I neglected to mention one recent incident: On May 27, 2011, several hackers who belong to a closely guarded English-language criminal forum called Darkode.com sought to fraudulently place a rogue ad on KrebsOnSecurity.com. The ad was made to appear as though it was advertising BitDefender antivirus software. Instead, it was designed to load a malicious domain: sophakevans. co. cc, a site that has been associated with pushing fake antivirus or “scareware.”

The miscreants agreed to pay at least $272 for up to 10,000 impressions of the ad to be run on my site. Fortunately, I have the opportunity to review ads that come through Federated’s system. What’s more, Federated blocked the ad before it was even tagged for approval.

Darkode members plot to purchase a rogue ad on KrebsOnSecurity.com. They failed.

I learned about this little stunt roughly at the same time it was being planned; Much to the constant annoyance of the site administrators, I secretly had gained access to Darkode and was able to take this screen shot of the discussion. The incident came just a few weeks after I Tweeted evidence of my presence on Darkode by posting screenshots of the forum. The main administrator of Darkode, a hacker who uses the nickname “Mafi,” didn’t appreciate that, and promised he and his friends had something fun planned for me. I guess this was it. Interestingly, Mafi also is admin at malwareview.com and is the developer of the Crimepack exploit kit.

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5
Aug 11

Is That a Virus in Your Shopping Cart?

Six million Web pages have been booby-trapped with malware, using security vulnerabilities in software that hundreds of thousands of e-commerce Web sites use to process credit and debit card transactions.

Web security firm Armorize said it has detected more than six million Web pages that were seeded with attack kits designed to exploit Web browser vulnerabilities and plant malicious software. The company said the hacked sites appear to be running outdated and insecure versions of osCommerce, an e-commerce shopping cart program that is popular with online stores.

Armorize said the compromised pages hammer a visitor’s browser with exploits that target at least five Web browser plug-in vulnerabilities, including two flaws in Java, a pair of Windows bugs, and a security weakness in Adobe‘s PDF Reader. Patches are available for all of the targeted browser vulnerabilities.

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14
Jun 11

Adobe Ships Security Patches, Auto-Update Feature

Adobe today issued more than a dozen security updates for its Acrobat and PDF Reader programs, including a feature update that will install future Reader security updates automatically. In addition, Adobe has shipped yet another version of its Flash Player software to fix a critical security flaw.

No doubt some will quibble with Adobe’s move toward auto-updating Reader: There is always a contingent in the user community who fear automatic updates will at some point force a faulty patch. But for better or worse, Adobe’s Reader software is the PDF reader software of choice for a majority of Windows computers in use today. Faced with incessant malware attacks against outdated versions of these programs, it seems irresponsible for Adobe to do anything other than offer auto-update capability to to Reader users more aggressively.

Adobe debuted this feature in April 2010, but at that the time Adobe decided to continue to honor whatever update option users had selected (the default has always been “download all updates automatically and notify me when they are ready to be installed”). With this latest update, Adobe will again prompt users to approve an auto-update choice, except this time the option pre-selected will be “Install Updates Automatically.”

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15
Apr 11

Time to Patch Your Flash

If it seems like you just updated your Flash Player software to plug a security hole that attackers were using to break into computers, you’re probably not imagining things: Three weeks ago, Adobe rushed out a new version to sew up a critical new security flaw. Today, Adobe issued a critical Flash update to eliminate another dangerous security hole that criminals are actively exploiting.

This new update addresses a vulnerability first detailed here at KrebsOnSecurity.com on Tuesday, and Adobe deserves credit for responding quickly with a patch. But there are few things that are simple about updating Flash, which ships in a dizzying array of version numbers and for many users must be deployed at least twice to cover all browsers. In addition, users may have to uninstall the existing version before updating to guarantee a trouble-free install. Also, Adobe Air will need to be updated if that software also is already installed. Finally, fixing this same vulnerability in Adobe Reader and Acrobat will require installing another patch, which won’t be out for at least another 10 days.

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