Severity: High
Summary:
- These vulnerabilities affect: Adobe Flash Player, Shockwave Player, and ColdFusion
- How an attacker exploits them: Multiple vectors of attack, including enticing your users to open malicious files or visit specially crafted web sites
- Impact: Various results; in the worst case, an attacker can gain complete control of your computer
- What to do: Install the appropriate Adobe patches immediately, or let Adobe’s updater do it for you.
Exposure:
Today, Adobe released three security bulletins describing vulnerabilities in Flash Player, Shockwave Player, and ColdFusion. A remote attacker could exploit the worst of these flaws to gain complete control of your computer. The summary below details some of the vulnerabilities in these popular software packages.
- APSB13-17: Three Flash Player Memory Corruption Flaws
Adobe’s bulletin describes three vulnerabilities in Flash Player running on all platforms. More specifically, the flaws consist of various memory corruption flaws, including a buffer overflow and integer overflow flaw. If an attacker can lure you to a web site, or get you to open a document containing specially crafted Flash content, he could exploit these flaws to execute code on your computer, with your privileges. If you have administrative or root privileges, the attacker could gain full control of your computer.
Adobe assigns these flaws their highest severity rating for Windows computers, but a lesser severity for Mac and Linux machines.
Adobe Priority Rating: 1 for Windows (Patch within 72 hours)
- APSB13-18: Shockwave Player Memory Corruption Vulnerability
Adobe Shockwave Player displays interactive, animated web content and movies called Shockwave. According to Adobe, the Shockwave Player is installed on some 450 million PCs.
Adobe’s bulletin describes an unspecified memory corruption vulnerability that affects Shockwave Player running on Windows and Macintosh computers.They don’t share any technical details about the flaw, but do share its scope and impact. If an attacker can entice one of your users into visiting a website containing some sort of malicious Shockwave content, he could exploit the flaw to execute code on that user’s computer, with that user’s privileges. If your Windows users have local administrator privileges, an attacker could exploit this vulnerability to gain full control of their computer.
Adobe Priority Rating: 1 (Patch within 72 hours)
- APSB13-19: Two ColdFusion Vulnerabilities
Adobe ColdFusion is an application server that allows you to develop and deploy web applications. It suffers from two security vulnerabilities that Adobe does not describe in much technical detail. They describe one flaw as a vulnerability that permits an attacker to invoke public methods on ColdFusion Components (CFC) using WebSockets (CVE-2013-3350), and the other as a flaw an attacker could leverage to cause a denial of service (DoS) condition. Other than that, the bulletin shares very little about the scope or impact of these flaws, so we’re unsure how easy or hard it is for attackers to leverage them. They rate the issues as Priority 1 for ColdFusion 10 and Priority 2 for version 9.
Adobe Priority Rating: 1 for version 10 (Patch within 72 hours)
Solution Path:
Adobe has released updates for all their affected software. If you use any of the software below, we recommend you download and deploy the corresponding updates as soon as possible, or let Adobe’s automatic updater do it for you:
- APSB13-17: Upgrade to the latest Flash Player (11.8.800.94 for Windows)
- APSB13-18: Upgrade to the latest Shockwave Player (12.0.3.133)
- APSB13-19: Apply the corresponding ColdFusion hotfix. More details in this Adobe technote.
For All WatchGuard Users:
Attackers can exploit these flaws using diverse exploitation methods. However, WatchGuard’s XTM appliances can help in many ways. First, our IPS and AV services are often capable of detecting the malicious Flash or Shockwave files attackers are actually using in the wild. If you’d like, you can also configure our proxies to block Shockwave or Flash content. This, however, blocks both legitimate and malicious content. If you do want to block this Flash or Shockwave via the Web or email, see our manual for more details on how to configure our proxy policies’ content-filtering.
Status:
Adobe has released patches correcting these issues.
References:
This alert was researched and written by Corey Nachreiner, CISSP (@SecAdept)
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