CVE-2017-2791: JustSystems Ichitaro 2016 Trial contains a vulnerability that exists when trying to open a specially crafted P

This month

HIGH 7.5DOWNGRADE

CVE-2017-2791 is a high-severity flaw (CVSS 7.5) affecting ichitaro. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

JustSystems Ichitaro 2016 Trial contains a vulnerability that exists when trying to open a specially crafted PowerPoint file. Due to the application incorrectly handling the error case for a function's result, the application will use this result in a pointer calculation for reading file data into. Due to this, the application will read data from the file into an invalid address thus corrupting memory. Under the right conditions, this can lead to

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.2% (top 33%)
CISA exploited list	No
Weakness	CWE-119
Published	2017-02-24
Last modified	2026-06-17

Publisher (CNA): Talos · Vendor: justsystems

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2017-02-24 22:59 UTCPublished CVE record published
2026-06-17 01:16 UTCUpdated Record last modified

justsystems ichitaro DOWNGRADE

Affected: 2016

Fixed in: no fixed release known

Safe to downgrade to: a release before 2016

1. Check installed version

apt-cache policy ichitaro || rpm -q ichitaro || ichitaro --version

2. No fixed release: DOWNGRADE to a release before 2016 (Debian / Ubuntu)

apt-cache madison ichitaro sudo apt install ichitaro=<VERSION_BEFORE_2016> sudo apt-mark hold ichitaro

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list ichitaro sudo dnf downgrade ichitaro-<VERSION_BEFORE_2016> sudo dnf versionlock add ichitaro

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2017-2791?

ichitaro: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2017-2791 being exploited?

CVE-2017-2791 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2017-2791 affect?

CVE-2017-2791 affects ichitaro. Severity is high (CVSS 7.5). JustSystems Ichitaro 2016 Trial contains a vulnerability that exists when trying to open a specially crafted PowerPoint file. Due to the application incorrectly handling the error case for a function's result, the application will use this

How urgent is CVE-2017-2791?

Priority 43/100. High severity

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References

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