CIS CYBER SECURITY ADVISORIES
MS-ISAC CYBER SECURITY ADVISORY NUMBER:
Vulnerability in Adobe Reader and Acrobat Could Allow For Remote Code Execution (APSB13-25)
A vulnerability has been discovered in Adobe Reader and Adobe Acrobat that could allow an attacker to take control of the affected system. Adobe Reader allows users to view Portable Document Format (PDF) files, while Adobe Acrobat offers users additional features such as the ability to create PDF files. Successful exploitation could result in an attacker gaining the same privileges as the logged on user. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Failed exploit attempts will likely cause denial-of-service conditions.
- Adobe Reader XI (11.0.04) and earlier 11.x versions for Windows and Macintosh
- Adobe Acrobat XI (11.0.04) and earlier 11.x versions for Windows and Macintosh
- Large and medium government entities: High
- Small government entities: High
- Large and medium business entities: High
- Small business entities: High
Home users: High
Adobe Reader and Acrobat are prone to a vulnerability that could allow for remote code execution. Although specific details are not available, description of this vulnerabilities is as follows:
- Regression that permits the launch of javacript scheme URIs when viewing a PDF in a browser (CVE-2013-5325)
We recommend the following actions be taken:
- Install the updates provided by Adobe immediately after appropriate testing.
- Users of Adobe Reader XI (11.0.04) for Windows and Macintosh should update to Adobe Reader XI (11.0.05).
- Users of Adobe Acrobat XI (11.0.04) for Windows and Macintosh should update to Adobe Acrobat XI (11.0.05).
- Run all software as a non-privileged user (one without administrative privileges) to diminish the effects of a successful attack.
- Remind users not to visit untrusted websites or follow links provided by unknown or untrusted sources.
- Do not open email attachments from unknown or untrusted sources.