CVE-2017-2840: A buffer overflow vulnerability exists in the ISO parsing functionality of EZB Systems UltraISO 9.6.6.3300

This month

HIGH 7.8DOWNGRADE

CVE-2017-2840 is a high-severity flaw (CVSS 7.8) affecting ultraiso. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A buffer overflow vulnerability exists in the ISO parsing functionality of EZB Systems UltraISO 9.6.6.3300. A specially crafted .ISO file can cause a vulnerability resulting in potential code execution. An attacker can provide a specific .ISO file to trigger this vulnerability.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.7% (top 23%)
CISA exploited list	No
Weakness	CWE-120
Published	2018-04-24
Last modified	2026-06-17

Publisher (CNA): Talos · Vendor: ezbsystems

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

Am I affected?

Timeline

2018-04-24 19:29 UTCPublished CVE record published
2026-06-17 01:16 UTCUpdated Record last modified

ezbsystems ultraiso DOWNGRADE

Affected: 9.6.6.3300

Fixed in: no fixed release known

Safe to downgrade to: a release before 9.6.6.3300

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 9.6.6.3300 (Debian / Ubuntu)

apt-cache madison ultraiso sudo apt install ultraiso=<VERSION_BEFORE_9.6.6.3300> sudo apt-mark hold ultraiso

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

dnf --showduplicates list ultraiso sudo dnf downgrade ultraiso-<VERSION_BEFORE_9.6.6.3300> sudo dnf versionlock add ultraiso

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-2017-2840?

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

Is CVE-2017-2840 being exploited?

CVE-2017-2840 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-2017-2840 affect?

CVE-2017-2840 affects ultraiso. Severity is high (CVSS 7.8). A buffer overflow vulnerability exists in the ISO parsing functionality of EZB Systems UltraISO 9.6.6.3300. A specially crafted .ISO file can cause a vulnerability resulting in potential code execution. An attacker can provide a specific .I

How urgent is CVE-2017-2840?

Priority 52/100. High severity; Public exploit reference

Related CVEs

CVE-2018-25267 MEDIUM 6.2 DOWNGRADE UltraISO 9.7.1.3519 contains a local buffer overflow vulnerability in the Output FileName field of the Make CD
CVE-2010-5255 MEDIUM 6.9 DOWNGRADE Untrusted search path vulnerability in UltraISO 9.3.6.2750 allows local users to gain privileges via a Trojan
CVE-2009-1260 HIGH 9.3 UPGRADE Multiple stack-based buffer overflows in UltraISO 9.3.3.2685 and earlier allow remote attackers to cause a den
CVE-2008-4825 HIGH 9.3 DOWNGRADE Multiple buffer overflows in UltraISO 9.3.1.2633, and possibly other versions before 9.3.3.2685, allow user-as
CVE-2008-3871 HIGH 9.3 DOWNGRADE Multiple format string vulnerabilities in UltraISO 9.3.1.2633, and possibly other versions before 9.3.3.2685,

References

← Back to latest CVEs