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A zero-day vulnerability affecting Adobe Flash, labeled as CVE-2018-4878, was publicly disclosed on January 31st. If successfully exploited, the vulnerability allows for remote code execution. Adobe stated that a security patch will be made available on February 5, 2018. Attacks exploiting this vulnerability have been seen in the wild, targeting specific individuals in South Korea with specially crafted phishing emails. It is probable that other threat actors will attempt to incorporate this vulnerability into their attacks. Due to the complexity and lack of available technical details, rapid adaption of CVE-2018-4878 is unlikely. This vulnerability garners special focus as it has been publicly disclosed and actively exploited prior to patching.
The eSentire Threat Intelligence team is actively monitoring the situation for changes.
To exploit this vulnerability, attackers embed malicious SWF files into Excel and Word documents which can be delivered through conventional malware delivery tactics such as phishing or malicious webpages. Further technical details are not available at this time.