CVE-2017-2790

Severity: critical (CVSS 9.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-02-24 · updated 2026-06-17
Weakness: CWE-119

Description

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.

Affected products

JustSystems Ichitaro: all versions

References

http://www.securityfocus.com/bid/96442
http://www.talosintelligence.com/reports/TALOS-2016-0197/
http://www.securityfocus.com/bid/96442
http://www.talosintelligence.com/reports/TALOS-2016-0197/

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