CVE-2005-2387: Multiple stack-based buffer overflows in GoodTech SMTP server 5.16 allow remote attackers to execute arbitrary

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HIGH 7.5DOWNGRADE

CVE-2005-2387 is a high-severity flaw (CVSS 7.5) affecting goodtech smtp server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple stack-based buffer overflows in GoodTech SMTP server 5.16 allow remote attackers to execute arbitrary code via (1) a RCPT TO command with a long DNS name, or (2) a large number of RCPT TO commands with a long e-mail name arugment in the last command.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	3.1% (top 12%)
CISA exploited list	No
Published	2005-07-27
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: goodtech systems

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2005-07-27 04:00 UTCPublished CVE record published
2026-06-16 22:14 UTCUpdated Record last modified

goodtech systems goodtech smtp server DOWNGRADE

Affected: 5.16

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.16

1. Check installed version

apt-cache policy goodtech-smtp-server || rpm -q goodtech-smtp-server || goodtech-smtp-server --version

2. No fixed release: DOWNGRADE to a release before 5.16 (Debian / Ubuntu)

apt-cache madison goodtech-smtp-server sudo apt install goodtech-smtp-server=<VERSION_BEFORE_5.16> sudo apt-mark hold goodtech-smtp-server

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

dnf --showduplicates list goodtech-smtp-server sudo dnf downgrade goodtech-smtp-server-<VERSION_BEFORE_5.16> sudo dnf versionlock add goodtech-smtp-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.

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-2005-2387?

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

Is CVE-2005-2387 being exploited?

CVE-2005-2387 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-2005-2387 affect?

CVE-2005-2387 affects goodtech smtp server. Severity is high (CVSS 7.5). Multiple stack-based buffer overflows in GoodTech SMTP server 5.16 allow remote attackers to execute arbitrary code via (1) a RCPT TO command with a long DNS name, or (2) a large number of RCPT TO commands with a long e-mail name arugment i

How urgent is CVE-2005-2387?

Priority 53/100. High severity; Public exploit reference

Related CVEs

CVE-2005-1931 MEDIUM 5.0 DOWNGRADE GoodTech SMTP Server 5.14 allows remote attackers to cause a denial of service (application crash) via a RCPT

References

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