CVE-2020-23679: Buffer overflow vulnerability in Renleilei1992 Linux_Network_Project 1.0, allows attackers to execute arbitrar

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CRITICAL 9.8REMOTEWATCHLISTDOWNGRADE

CVE-2020-23679 is a critical-severity flaw (CVSS 9.8) affecting linux network project. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow vulnerability in Renleilei1992 Linux_Network_Project 1.0, allows attackers to execute arbitrary code, via the password field.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action
On your watchlist

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

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.9% (top 21%)
CISA exploited list	No
Weakness	CWE-120
Published	2021-11-03
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: linux network project

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

Am I affected?

Timeline

2021-11-03 17:15 UTCPublished CVE record published
2026-06-17 03:04 UTCUpdated Record last modified

linux network project linux network project DOWNGRADE

Affected: 1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0

1. Check installed version

apt-cache policy linux-network-project || rpm -q linux-network-project || linux-network-project --version

2. No fixed release: DOWNGRADE to a release before 1.0 (Debian / Ubuntu)

apt-cache madison linux-network-project sudo apt install linux-network-project=<VERSION_BEFORE_1.0> sudo apt-mark hold linux-network-project

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

dnf --showduplicates list linux-network-project sudo dnf downgrade linux-network-project-<VERSION_BEFORE_1.0> sudo dnf versionlock add linux-network-project

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-2020-23679?

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

Is CVE-2020-23679 being exploited?

CVE-2020-23679 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-2020-23679 affect?

CVE-2020-23679 affects linux network project. Severity is critical (CVSS 9.8). Buffer overflow vulnerability in Renleilei1992 Linux_Network_Project 1.0, allows attackers to execute arbitrary code, via the password field.

How urgent is CVE-2020-23679?

Priority 69/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action; On your watchlist

References

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