CVE-2017-2789 Memory corruption in Ichitaro
A heap-based buffer overflow in JustSystems Ichitaro Office allows attackers to execute arbitrary code via a crafted document.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2017-2789?
CVE-2017-2789 is a high-severity memory corruption vulnerability in JustSystems Ichitaro, published on 24 Feb 2017. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-119
Which versions are affected by CVE-2017-2789?
It affects 1 product.
Products include Justsystems Ichitaro.
How do I fix CVE-2017-2789?
No fix has been published for CVE-2017-2789 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2017-2789 being exploited?
There is no known exploitation of CVE-2017-2789 in the wild and no public exploit code.
Other vulnerabilities in JustSystems Ichitaro
Sources
Also known as GHSA-74fv-pcxw-cvhx.