CVE-2017-6880: Buffer overflow in Cerberus FTP Server 8.0.10.3 allows remote attackers to cause a denial of service (daemon c

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CRITICAL 9.8REMOTEDOWNGRADE

CVE-2017-6880 is a critical-severity flaw (CVSS 9.8) affecting cerberus ftp server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in Cerberus FTP Server 8.0.10.3 allows remote attackers to cause a denial of service (daemon crash) or possibly have unspecified other impact via a long MLST command.

Why this priority

Critical severity
EPSS top 3%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action

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	14.3% (top 3%)
CISA exploited list	No
Weakness	CWE-119
Published	2017-03-17
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: cerberus

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

Am I affected?

Timeline

2017-03-17 17:59 UTCPublished CVE record published
2026-06-17 01:23 UTCUpdated Record last modified

cerberus cerberus ftp server DOWNGRADE

Affected: 8.0.10.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 8.0.10.3

1. Check installed version

apt-cache policy cerberus-ftp-server || rpm -q cerberus-ftp-server || cerberus-ftp-server --version

2. No fixed release: DOWNGRADE to a release before 8.0.10.3 (Debian / Ubuntu)

apt-cache madison cerberus-ftp-server sudo apt install cerberus-ftp-server=<VERSION_BEFORE_8.0.10.3> sudo apt-mark hold cerberus-ftp-server

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

dnf --showduplicates list cerberus-ftp-server sudo dnf downgrade cerberus-ftp-server-<VERSION_BEFORE_8.0.10.3> sudo dnf versionlock add cerberus-ftp-server

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: Cerberus FTP Server 8.0.10.3 - 'MLST' Buffer Overflow (PoC)

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-2017-6880?

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

Is CVE-2017-6880 being exploited?

CVE-2017-6880 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-2017-6880 affect?

CVE-2017-6880 affects cerberus ftp server. Severity is critical (CVSS 9.8). Buffer overflow in Cerberus FTP Server 8.0.10.3 allows remote attackers to cause a denial of service (daemon crash) or possibly have unspecified other impact via a long MLST command.

How urgent is CVE-2017-6880?

Priority 68/100. Critical severity; EPSS top 3%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

References

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