During the last few months, FortiGuard Labs discovered and reported multiple use-after-free (UAF) vulnerabilities found in different versions of Microsoft Word. These vulnerabilities were patched in the January and March security updates, respectively. These patches are rated as critical/important, and as always, we urge users update Microsoft Office as soon as possible.
Only a few days after FortiGuard Labs published an article about a spam campaign exploiting an RTF document, we found another spam campaign using an even more recent document vulnerability, CVE-2017-11882.
Recently, FortiGuard Labs found an interesting malware campaign using the recently documented vulnerability CVE-2017-11826 that was patched by Microsoft in October of this year. A detailed analysis of this exploit is also included in this article.
Early last week, FortiGuard Labs came across several malicious documents that exploit the vulnerability CVE-2012-0158. To evade suspicion from the victim, these RTF files drop decoy documents containing politically themed texts about a variety of Vietnamese government-related information.