MS-ISAC CYBERSECURITY ADVISORIES
MS-ISAC ADVISORY NUMBER:
Vulnerability in Microsoft Windows Journal Could Allow Remote Code Execution (MS15-114)
A heap overflow vulnerability has been discovered in Microsoft Windows Journal that could allow remote code execution. This vulnerability is triggered if a user opens a specially crafted Microsoft Journal (.jnt) file. Successful exploitation of this vulnerability 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.
There are no reports of this vulnerability being exploited in the wild.
Windows Vista Windows 7 Windows Server 2008Windows Server 2008 R2
Large and medium government entities: High
Small government entities: High
Large and medium business entities: High
Small business entities: High
Home users: High
A heap overflow vulnerability has been discovered in Microsoft Windows Journal, which could allow for remote code execution when handling specially crafted Journal (.jnt) files. In an email attack scenario, an attacker could exploit this vulnerability by sending an email enticing a user to open an attached specially crafted Journal file. Successful exploitation of this vulnerability could result in the attacker gaining the same rights 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. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. (CVE-2015-6097)
We recommend the following actions be taken:
Apply appropriate patches provided by Microsoft to vulnerable systems immediately after appropriate testing.If patching is not possible immediately, multiple workarounds are listed in the Microsoft reference below.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 un-trusted websites or follow links provided by unknown or un-trusted sources.Inform and educate users regarding the threats posed by hypertext links contained in emails or attachments especially from un-trusted sources.