Microsoft Windows NT 4.0 RRAS/RAS Client credentials management

CVSS Meta Temp Score
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CTI Interest Score
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4.8$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Microsoft Windows NT 4.0. The affected element is an unknown function of the component RRAS/RAS Client. The manipulation leads to credentials management. This vulnerability is traded as CVE-1999-0755. Furthermore, there is an exploit available. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability was found in Microsoft Windows NT 4.0 (Operating System). It has been rated as critical. This issue affects an unknown code of the component RRAS/RAS Client. The manipulation with an unknown input leads to a credentials management vulnerability. Using CWE to declare the problem leads to CWE-255. Impacted is confidentiality. The summary by CVE is:

Windows NT RRAS and RAS clients cache a user's password even if the user has not selected the "Save password" option.

The weakness was shared 05/27/1999 by Martin as MS99-017 as confirmed bulletin (Technet). The advisory is shared at microsoft.com. The identification of this vulnerability is CVE-1999-0755. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are unknown but a public exploit is available. MITRE ATT&CK project uses the attack technique T1552 for this issue.

The exploit is available at exploit-db.com. It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $25k-$100k.

Applying the patch MS99-017 is able to eliminate this problem. The bugfix is ready for download at microsoft.com.

The vulnerability is also documented in the databases at X-Force (2362), Exploit-DB (19196), SecurityFocus (BID 232†) and Vulnerability Center (SBV-2586†). support.microsoft.com is providing further details. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Credentials management
CWE: CWE-255
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: MS99-017

Timelineinfo

03/19/1998 🔍
03/19/1998 +0 days 🔍
05/27/1999 +434 days 🔍
05/27/1999 +0 days 🔍
10/19/2003 +1606 days 🔍
06/20/2014 +3897 days 🔍
04/19/2026 +4321 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: MS99-017
Researcher: Martin
Status: Confirmed

CVE: CVE-1999-0755 (🔍)
GCVE (CVE): GCVE-0-1999-0755
GCVE (VulDB): GCVE-100-14669
X-Force: 2362
SecurityFocus: 232 - NT RAS Dial-up Networking "Save Password" Vulnerability
Vulnerability Center: 2586 - [MS99-017] RRAS Caches Passwords When Using Dial-up Networking Client, Low

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

Entryinfo

Created: 06/21/2014 00:36
Updated: 04/19/2026 03:22
Changes: 06/21/2014 00:36 (63), 05/16/2019 09:33 (2), 01/29/2025 19:51 (25), 04/19/2026 03:22 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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