Microsoft Internet Explorer 5.0 Offline Browsing Pack access control

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.0$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in Microsoft Internet Explorer 5.0. Affected by this vulnerability is an unknown functionality of the component Offline Browsing Pack. Executing a manipulation can lead to access control. The identification of this vulnerability is CVE-1999-0839. The attack can only be executed locally. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical was found in Microsoft Internet Explorer 5.0 (Web Browser). This vulnerability affects an unknown part of the component Offline Browsing Pack. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Windows NT Task Scheduler installed with Internet Explorer 5 allows a user to gain privileges by modifying the job after it has been scheduled.

The issue has been introduced in 06/02/1998. The weakness was shared 11/29/1999 by Arne Vidstrom with Microsoft as MS99-051 as confirmed bulletin (Technet). The advisory is shared for download at microsoft.com. This vulnerability was named CVE-1999-0839. The exploitation appears to be easy. The attack needs to be approached locally. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068.

The vulnerability was handled as a non-public zero-day exploit for at least 545 days. During that time the estimated underground price was around $25k-$100k.

Upgrading eliminates this vulnerability. Applying the patch MS99-051 is able to eliminate this problem. The bugfix is ready for download at microsoft.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at X-Force (3664), SecurityFocus (BID 828†) and Vulnerability Center (SBV-4033†). Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.4
VulDB Meta Temp Score: 8.0

VulDB Base Score: 8.4
VulDB Temp Score: 8.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: MS99-051

Timelineinfo

06/02/1998 🔍
11/29/1999 +545 days 🔍
11/29/1999 +0 days 🔍
11/29/1999 +0 days 🔍
11/29/1999 +0 days 🔍
03/24/2004 +1577 days 🔍
06/22/2014 +3742 days 🔍
04/19/2026 +4319 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: MS99-051
Researcher: Arne Vidstrom
Organization: Microsoft
Status: Confirmed

CVE: CVE-1999-0839 (🔍)
GCVE (CVE): GCVE-0-1999-0839
GCVE (VulDB): GCVE-100-15004
X-Force: 3664
SecurityFocus: 828
Vulnerability Center: 4033 - [MS99-051] Windows NT Task Scheduler Installed with Internet Explorer 5 Allow Privilege Elevation, Medium

Entryinfo

Created: 06/22/2014 15:11
Updated: 04/19/2026 21:00
Changes: 06/22/2014 15:11 (48), 04/07/2017 12:06 (19), 04/19/2026 21:00 (15)
Complete: 🔍
Cache ID: 216::103

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