JustSystems Ichitaro any version

When copying filedata into a buffer, JustSystems Ichitaro Office 2016 Trial will calculate two values to determine how much data to copy from the document. If both of these values are larger than the size of the buffer, the application will choose the smaller of the two and trust it to copy data from the file. This value is larger than the buffer size, which leads to a heap-based buffer overflow. This overflow corrupts an offset in the heap used in pointer arithmetic for writing data and can lead to code execution under the context of the application.

When processing a record type of 0x3c from a Workbook stream from an Excel file (.xls), JustSystems Ichitaro Office trusts that the size is greater than zero, subtracts one from the length, and uses this result as the size for a memcpy. This results in a heap-based buffer overflow and can lead to code execution under the context of the application.

Unspecified vulnerability in JustSystems Ichitaro and Ichitaro Government allows remote attackers to execute arbitrary code via a crafted document, a different vulnerability than CVE-2010-3916.

Unspecified vulnerability in JustSystems Ichitaro and Ichitaro Government allows remote attackers to execute arbitrary code via a crafted document, a different vulnerability than CVE-2010-3915.

Unspecified vulnerability in multiple JustSystems Ichitaro products allows remote attackers to execute arbitrary code via a crafted JTD document, as exploited in the wild in August 2008.

JustSystems JUST Online Update, as used in Ichitaro through 2014 and other products, does not properly validate signatures of update modules, which allows remote attackers to spoof modules and execute arbitrary code via a crafted signature.