CVE-2024-2021: A vulnerability was found in Netentsec NS-ASG Application Security Gateway 6.3

This month

MEDIUM 6.3DOWNGRADE

CVE-2024-2021 is a medium-severity flaw (CVSS 6.3) affecting application security gateway. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability was found in Netentsec NS-ASG Application Security Gateway 6.3. It has been classified as critical. Affected is an unknown function of the file /admin/list_localuser.php. The manipulation of the argument ResId leads to sql injection. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-255300. NOTE: The vendor was contacted early abo

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.7% (top 45%)
CISA exploited list	No
Weakness	CWE-89
Published	2024-03-01
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: netentsec

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

Am I affected?

Timeline

2024-03-01 00:15 UTCPublished CVE record published
2026-06-17 07:23 UTCUpdated Record last modified

netentsec application security gateway DOWNGRADE

Affected: 6.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.3

1. Check installed version

apt-cache policy application-security-gateway || rpm -q application-security-gateway || application-security-gateway --version

2. No fixed release: DOWNGRADE to a release before 6.3 (Debian / Ubuntu)

apt-cache madison application-security-gateway sudo apt install application-security-gateway=<VERSION_BEFORE_6.3> sudo apt-mark hold application-security-gateway

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

dnf --showduplicates list application-security-gateway sudo dnf downgrade application-security-gateway-<VERSION_BEFORE_6.3> sudo dnf versionlock add application-security-gateway

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-2024-2021?

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

Is CVE-2024-2021 being exploited?

CVE-2024-2021 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-2024-2021 affect?

CVE-2024-2021 affects application security gateway. Severity is medium (CVSS 6.3). A vulnerability was found in Netentsec NS-ASG Application Security Gateway 6.3. It has been classified as critical. Affected is an unknown function of the file /admin/list_localuser.php. The manipulation of the argument ResId leads to sql i

How urgent is CVE-2024-2021?

Priority 41/100. Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2024-6007 MEDIUM 6.3 DOWNGRADE A vulnerability classified as critical has been found in Netentsec NS-ASG Application Security Gateway 6.3
CVE-2024-5773 MEDIUM 6.3 DOWNGRADE A vulnerability, which was classified as critical, was found in Netentsec NS-ASG Application Security Gateway
CVE-2024-5772 MEDIUM 6.3 DOWNGRADE A vulnerability, which was classified as critical, has been found in Netentsec NS-ASG Application Security Gat
CVE-2024-5590 MEDIUM 6.3 DOWNGRADE A vulnerability was found in Netentsec NS-ASG Application Security Gateway 6.3
CVE-2024-5589 MEDIUM 6.3 DOWNGRADE A vulnerability was found in Netentsec NS-ASG Application Security Gateway 6.3

References

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