Microsoft IIS 3.0/4.0 PKCS #1 information disclosure

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.
5.1$0-$5k0.00

Summaryinfo

A vulnerability has been found in Microsoft IIS 3.0/4.0 and classified as problematic. Affected by this vulnerability is an unknown functionality of the component PKCS #1 Handler. Performing a manipulation results in information disclosure. This vulnerability is reported as CVE-1999-0007. No exploit exists. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability classified as problematic has been found in Microsoft IIS 3.0/4.0 (Web Server). This affects an unknown part of the component PKCS #1 Handler. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. The summary by CVE is:

Information from SSL-encrypted sessions via PKCS #1.

The issue has been introduced in 05/15/1997. The weakness was disclosed 06/26/1998 by Daniel Bleichenbacher as MS98-002 as confirmed security bulletin (Website). The advisory is shared at microsoft.com. This vulnerability is uniquely identified as CVE-1999-0007. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

The vulnerability was handled as a non-public zero-day exploit for at least 407 days. During that time the estimated underground price was around $5k-$25k.

Applying the patch MS98-002 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 (1232), SecurityFocus (BID 676†) and Vulnerability Center (SBV-539†). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

  • C2net Stonghold Web Server 2.0.1/2.2/2.3
  • Microsoft Exchange Server 5.5
  • Microsoft IIS 3.0/4.0
  • Netscape Enterprise Server up to 3.5.1
  • Ssleay up to 0.9

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

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

NVD Base Score: 🔍

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
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: Patch
Status: 🔍

0-Day Time: 🔍

Patch: MS98-002

Timelineinfo

05/15/1997 🔍
06/26/1998 +407 days 🔍
06/26/1998 +0 days 🔍
06/26/1998 +0 days 🔍
06/26/1998 +0 days 🔍
12/26/2002 +1644 days 🔍
06/19/2014 +4193 days 🔍
04/17/2026 +4320 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: MS98-002
Researcher: Daniel Bleichenbacher
Status: Confirmed

CVE: CVE-1999-0007 (🔍)
GCVE (CVE): GCVE-0-1999-0007
GCVE (VulDB): GCVE-100-14157
X-Force: 1232
SecurityFocus: 676 - Multiple Vendor PKCS#1 Vulnerability
Vulnerability Center: 539 - [MS98-002] Multiple Vendor PKCS#1 Vulnerability, Medium

Entryinfo

Created: 06/19/2014 15:58
Updated: 04/17/2026 13:21
Changes: 06/19/2014 15:58 (64), 05/07/2019 10:25 (3), 04/17/2026 13:21 (16)
Complete: 🔍
Cache ID: 216::103

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

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to know what is going to be exploited?

We predict KEV entries!