CVE-2018-11034: In 2345 Security Guard 3.7, the driver file (2345NsProtect.sys, X64 version) allows local users to cause a den

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HIGH 7.8DOWNGRADE

CVE-2018-11034 is a high-severity flaw (CVSS 7.8) affecting security guard. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In 2345 Security Guard 3.7, the driver file (2345NsProtect.sys, X64 version) allows local users to cause a denial of service (BSOD) or possibly have unspecified other impact because of not validating input values from IOCTL 0x8000200D.

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	Low
User interaction	None
EPSS exploit chance	1.0% (top 38%)
CISA exploited list	No
Weakness	CWE-20
Published	2018-05-14
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: 2345.cc

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

Am I affected?

Timeline

2018-05-14 01:29 UTCPublished CVE record published
2026-06-17 01:35 UTCUpdated Record last modified

2345.cc security guard DOWNGRADE

Affected: 3.7

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.7

1. Check installed version

apt-cache policy security-guard || rpm -q security-guard || security-guard --version

2. No fixed release: DOWNGRADE to a release before 3.7 (Debian / Ubuntu)

apt-cache madison security-guard sudo apt install security-guard=<VERSION_BEFORE_3.7> sudo apt-mark hold security-guard

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

dnf --showduplicates list security-guard sudo dnf downgrade security-guard-<VERSION_BEFORE_3.7> sudo dnf versionlock add security-guard

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: 2345 Security Guard 3.7 - '2345NsProtect.sys' Denial of Service

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-2018-11034?

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

Is CVE-2018-11034 being exploited?

CVE-2018-11034 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-2018-11034 affect?

CVE-2018-11034 affects security guard. Severity is high (CVSS 7.8). In 2345 Security Guard 3.7, the driver file (2345NsProtect.sys, X64 version) allows local users to cause a denial of service (BSOD) or possibly have unspecified other impact because of not validating input values from IOCTL 0x8000200D.

How urgent is CVE-2018-11034?

Priority 48/100. High severity; Public exploit reference

Related CVEs

CVE-2018-11035 HIGH 7.8 DOWNGRADE In 2345 Security Guard 3.7, the driver file (2345NsProtect.sys, X64 version) allows local users to cause a den
CVE-2018-10977 HIGH 7.8 DOWNGRADE In 2345 Security Guard 3.7, the driver file (2345BdPcSafe.sys, X64 version) allows local users to cause a deni
CVE-2018-10976 HIGH 7.8 DOWNGRADE In 2345 Security Guard 3.7, the driver file (2345BdPcSafe.sys, X64 version) allows local users to cause a deni
CVE-2018-10975 HIGH 7.8 DOWNGRADE In 2345 Security Guard 3.7, the driver file (2345BdPcSafe.sys, X64 version) allows local users to cause a deni
CVE-2018-10974 HIGH 7.8 DOWNGRADE In 2345 Security Guard 3.7, the driver file (2345BdPcSafe.sys, X64 version) allows local users to cause a deni

References

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