CIS CYBERSECURITY ADVISORIES
MS-ISAC ADVISORY NUMBER:
Vulnerability In Adobe Flash Player Could Allow Remote Code Execution
A zero-day vulnerability has been discovered in Adobe Flash Player, which could allow remote code execution. Adobe Flash Player is a widely distributed multimedia and application player used to enhance the user experience when visiting web pages or reading email messages. Successful exploitation could result in an attacker compromising data security, potentially allowing access to confidential data, or could compromise processing resources in a user's computer. Failed exploit attempts will likely cause denial-of-service conditions. CIS will continue to monitor this vulnerability and update accordingly.
This exploit has been confirmed to be in use in the wild as part of malvertising attacks and appears to be part of the Angler Exploit Kit.
- Adobe Flash Player 184.108.40.2066 and earlier versions for Windows and Macintosh
- Adobe Flash Player 220.127.116.114 and earlier 13.x versions
- Adobe Flash Player 18.104.22.1680 and earlier versions for Linux
- Large and medium government entities: High
- Small government entities: High
- Large and medium business entities: High
- Small business entities: High
Home users: High
An Adobe Flash Player zero-day vulnerability has been discovered by Trend Micro, which could allow for remote code execution. Adobe has acknowledged this vulnerability and plans to release a patch during the week.
Trend Micro reports that this vulnerability is being observed in the wild in malvertising attacks. One affected domain,dailymotion[.]com,is a popular video sharing site which, after a series of redirects, takes the user to www.retilio[.]com/skillt.swf. Due to the similarities in obfuscation techniques and infection chains, it is believed that this vulnerability is included in the Angler Exploit Kit.
Successful exploitation could result in an attacker compromising data security, potentially allowing access to confidential data, or could compromise processing resources in a user's computer.
We recommend the following actions be taken:
- Patch to the latest version once released and after appropriate testing.
- Consider blocking the domains reported by Trend Micro.
- Remind users not to visit websites or follow links provided by unknown or untrusted sources.
- Do not open email attachments from unknown or untrusted sources.
- Limit user account privileges to those required only.