CVE-2018-1000043: Security Onion Solutions Squert version 1.0.1 through 1.6.7 contains a CWE-78: Improper Neutralization of Spec

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2018-1000043 is a critical-severity flaw (CVSS 9.8) affecting squert. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Security Onion Solutions Squert version 1.0.1 through 1.6.7 contains a CWE-78: Improper Neutralization of Special Elements used in an OS Command (OS Command Injection) vulnerability in .inc/callback.php that can result in execution of OS Commands. This attack appear to be exploitable via Web request to .inc/callback.php with the payload in the txdata parameter, used in tx()/transcript(), or the catdata parameter, used in cat(). This vulnerability

Why this priority

Critical severity
EPSS top 10%: very likely to be exploited
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	3.9% (top 10%)
CISA exploited list	No
Weakness	CWE-78
Published	2018-02-09
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: securityonion

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

Am I affected?

Timeline

2018-02-09 23:29 UTCPublished CVE record published
2026-06-17 01:32 UTCUpdated Record last modified

securityonion squert UPGRADE

Affected: >= 1.1.1 and <= 1.6.7

Fixed in: newer than 1.6.7

Safe to downgrade to: a release before 1.1.1

1. Check installed version

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

2. UPGRADE to newer than 1.6.7 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade squert

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade squert

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 1.1.1 (Debian / Ubuntu)

apt-cache madison squert sudo apt install squert=<VERSION_BEFORE_1.1.1> sudo apt-mark hold squert

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list squert sudo dnf downgrade squert-<VERSION_BEFORE_1.1.1> sudo dnf versionlock add squert

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-2018-1000043?

squert: upgrade to newer than 1.6.7. Exact commands for each OS are on this page.

Is CVE-2018-1000043 being exploited?

CVE-2018-1000043 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-2018-1000043 affect?

CVE-2018-1000043 affects squert. Severity is critical (CVSS 9.8). Security Onion Solutions Squert version 1.0.1 through 1.6.7 contains a CWE-78: Improper Neutralization of Special Elements used in an OS Command (OS Command Injection) vulnerability in .inc/callback.php that can result in execution of OS Co

How urgent is CVE-2018-1000043?

Priority 62/100. Critical severity; EPSS top 10%: very likely to be exploited; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

Related CVEs

CVE-2018-1000044 CRITICAL 9.8 UPGRADE Security Onion Solutions Squert version 1.1.1 through 1.6.7 contains a SQL Injection vulnerability in .inc/cal
CVE-2018-1000042 CRITICAL 9.8 UPGRADE Security Onion Solutions Squert version 1.3.0 through 1.6.7 contains a CWE-78: Improper Neutralization of Spec

References

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