Host SMTP Server Relay privileges management

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.0$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in Host. This impacts an unknown function of the component SMTP Server. Performing a manipulation results in privileges management (Relay). This vulnerability is identified as CVE-1999-0512. The attack can be initiated remotely. Additionally, an exploit exists. This vulnerability is considered historic because of its background and reception. You should change the configuration settings.

Detailsinfo

A vulnerability, which was classified as critical, was found in Host (affected version not known). This affects some unknown functionality of the component SMTP Server. The manipulation with an unknown input leads to a privileges management vulnerability (Relay). CWE is classifying the issue as CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. This is going to have an impact on integrity, and availability. The summary by CVE is:

A mail server is explicitly configured to allow SMTP mail relay, which allows abuse by spammers.

The weakness was released 01/01/1999. This vulnerability is uniquely identified as CVE-1999-0512. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are unknown but a public exploit is available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/17/2026). The attack technique deployed by this issue is T1068 according to MITRE ATT&CK. Due to its background and reception, this vulnerability has a historic impact.

It is declared as highly functional. We expect the 0-day to have been worth approximately $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 10262 (MTA Open Mail Relaying Allowed), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SMTP problems and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 74037 (Possible Mail Relay).

It is possible to mitigate the problem by applying the configuration setting .It is possible to mitigate the weakness by firewalling tcp/25 (smtp). The best possible mitigation is suggested to be the change of configuration settings.

The vulnerability is also documented in the databases at X-Force (6806), Tenable (10262), SecurityFocus (BID 6118†) and Vulnerability Center (SBV-491†). Entries connected to this vulnerability are available at VDB-16963, VDB-19154 and VDB-20531. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.5
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Name: Relay
Class: Privileges management / Relay
CWE: CWE-269 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Highly functional

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 10262
Nessus Name: MTA Open Mail Relaying Allowed
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 11852
OpenVAS Name: this_host_name(
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Config
Status: 🔍

0-Day Time: 🔍

Firewalling: 🔍
McAfee IPS: 🔍
McAfee IPS Version: 🔍

ISS Proventia IPS: 🔍

Timelineinfo

01/01/1999 🔍
01/01/1999 +0 days 🔍
01/01/1999 +0 days 🔍
06/22/1999 +172 days 🔍
11/06/2002 +1233 days 🔍
12/23/2002 +47 days 🔍
06/19/2014 +4196 days 🔍
04/17/2026 +4320 days 🔍

Sourcesinfo

Status: Not defined

CVE: CVE-1999-0512 (🔍)
GCVE (CVE): GCVE-0-1999-0512
GCVE (VulDB): GCVE-100-14331
X-Force: 6806
SecurityFocus: 6118 - Linuxconf mailconf Module Mail Relay Vulnerability
Vulnerability Center: 491 - Spam Abuse is Allowed since Mail relay is Enabled, Critical

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 06/20/2014 00:39
Updated: 04/17/2026 22:15
Changes: 06/20/2014 00:39 (66), 05/07/2019 09:16 (10), 04/17/2026 22:15 (19)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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