Microsoft Internet Explorer 4.0 HTML Library res Link memory corruption

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
9.2$0-$5k0.00

Summaryinfo

A vulnerability was found in Microsoft Internet Explorer 4.0 and classified as critical. This issue affects some unknown processing of the component HTML Library. Such manipulation as part of res Link leads to memory corruption. This vulnerability is listed as CVE-1999-0967. The attack may be performed from remote. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Microsoft Internet Explorer 4.0 (Web Browser) and classified as very critical. Affected by this issue is an unknown code of the component HTML Library. The manipulation as part of a res Link leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Buffer overflow in the HTML library used by Internet Explorer, Outlook Express, and Windows Explorer via the res: local resource protocol.

The issue has been introduced in 04/01/1997. The weakness was presented 11/01/1997 with L0pht (Website). The advisory is available at webproxy.com. This vulnerability is handled as CVE-1999-0967. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 04/17/2026). It is expected to see the exploit prices for this product decreasing in the near future.

The vulnerability was handled as a non-public zero-day exploit for at least 214 days. During that time the estimated underground price was around $25k-$100k.

Upgrading to version 5.0, 5.5 or 6.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (3837) and Vulnerability Center (SBV-2874†). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Microsoft Internet Explorer 4.0
  • Microsoft Outlook Express

Productinfo

Type

Vendor

Name

Version

License

Support

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.6
VulDB Meta Temp Score: 9.2

VulDB Base Score: 9.6
VulDB Temp Score: 9.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Internet Explorer 5.0/5.5/6.0

Timelineinfo

04/01/1997 🔍
11/01/1997 +214 days 🔍
11/01/1997 +0 days 🔍
11/01/1997 +0 days 🔍
11/17/2003 +2207 days 🔍
06/18/2014 +3866 days 🔍
04/17/2026 +4321 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: webproxy.com
Organization: L0pht
Status: Confirmed
Confirmation: 🔍

CVE: CVE-1999-0967 (🔍)
GCVE (CVE): GCVE-0-1999-0967
GCVE (VulDB): GCVE-100-14018
X-Force: 3837
Vulnerability Center: 2874 - Buffer Overflow in HTML Library Used by Internet Explorer, Outlook Express and Windows Explorer, Medium

Entryinfo

Created: 06/18/2014 17:21
Updated: 04/17/2026 03:22
Changes: 06/18/2014 17:21 (47), 04/07/2017 12:05 (16), 04/17/2026 03:22 (18)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Interested in the pricing of exploits?

See the underground prices here!