US Robotics Modem 33.6 ATH Command privileges management

CVSS Meta Temp Score
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CTI Interest Score
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7.3$0-$5k0.00

Summaryinfo

A vulnerability has been found in US Robotics Modem 33.6 and classified as critical. This issue affects some unknown processing of the component ATH Command Handler. This manipulation with the input +++ causes privileges management. This vulnerability is tracked as CVE-1999-1228. No exploit exists. This vulnerability is considered historic because of its background and reception.

Detailsinfo

A vulnerability was found in US Robotics Modem 33.6. It has been declared as critical. Affected by this vulnerability is an unknown part of the component ATH Command Handler. The manipulation with the input value +++ leads to a privileges management vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Various modems that do not implement a guard time, or are configured with a guard time of 0, can allow remote attackers to execute arbitrary modem commands such as ATH, ATH0, etc., via a "+++" sequence that appears in ICMP packets, the subject of an e-mail message, IRC commands, and others.

The weakness was disclosed 09/27/1998 as not defined posting (Bugtraq). It is possible to read the advisory at marc.theaimsgroup.com. This vulnerability is known as CVE-1999-1228. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD 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.

The vulnerability scanner Nessus provides a plugin with the ID 10020 (+ + + ATH0 Modem Hang Up String Remote DoS), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Denial of Service and running in the context r.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Attack attempts may be identified with Snort ID 274. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 1474.

The vulnerability is also documented in the databases at X-Force (3320), Tenable (10020) and Vulnerability Center (SBV-460†). Additional details are provided at macintouch.com. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

  • Diamond Supra
  • Logicode Quicktel
  • US Robotics Modem

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.3
VulDB Temp Score: 7.3
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

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

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 10020
Nessus Name: + + + ATH0 Modem Hang Up String Remote DoS
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍
Snort ID: 274
Snort Message: PROTOCOL-ICMP ath
Snort Class: 🔍
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

SourceFire IPS: 🔍
ISS Proventia IPS: 🔍
PaloAlto IPS: 🔍

Timelineinfo

09/27/1998 🔍
09/27/1998 +0 days 🔍
09/27/1998 +0 days 🔍
07/29/1999 +305 days 🔍
12/22/2002 +1242 days 🔍
06/19/2014 +4197 days 🔍
04/17/2026 +4320 days 🔍

Sourcesinfo

Advisory: marc.theaimsgroup.com
Status: Not defined

CVE: CVE-1999-1228 (🔍)
GCVE (CVE): GCVE-0-1999-1228
GCVE (VulDB): GCVE-100-14227
X-Force: 3320 - Global Village modem denial of service
Vulnerability Center: 460 - Various Modems \, Medium

Misc.: 🔍

Entryinfo

Created: 06/19/2014 17:36
Updated: 04/17/2026 16:04
Changes: 06/19/2014 17:36 (73), 05/06/2019 21:04 (2), 04/17/2026 16:04 (16)
Complete: 🔍
Cache ID: 216::103

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

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