VDB-14703 · CVE-1999-1164 · XFDB 8356

Microsoft Outlook 97/98/2000 X-UIDL Header denial of service

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-$5k	0.00

Summaryinfo

A vulnerability has been found in Microsoft Outlook 97/98/2000 and classified as problematic. The impacted element is an unknown function of the component X-UIDL Header Handler. Performing a manipulation results in denial of service. This vulnerability was named CVE-1999-1164. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Microsoft Outlook 97/98/2000 (Groupware Software). It has been classified as problematic. This affects an unknown part of the component X-UIDL Header Handler. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. The summary by CVE is:

Microsoft Outlook client allows remote attackers to cause a denial of service by sending multiple email messages with the same X-UIDL headers, which causes Outlook to hang.

The weakness was presented 06/25/1999 as not defined posting (Bugtraq). It is possible to read the advisory at marc.theaimsgroup.com. This vulnerability is uniquely identified as CVE-1999-1164. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (8356) and Vulnerability Center (SBV-2720†). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Groupware Software

Vendor

Microsoft

Name

Outlook

Version

License

commercial

Website

Vendor: https://www.microsoft.com/

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

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

06/25/1999 🔍
06/25/1999 +0 days 🔍
06/25/1999 +0 days 🔍
10/28/2003 +1586 days 🔍
06/21/2014 +3889 days 🔍
04/19/2026 +4320 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: marc.theaimsgroup.com
Status: Confirmed

CVE: CVE-1999-1164 (🔍)
GCVE (CVE): GCVE-0-1999-1164
GCVE (VulDB): GCVE-100-14703
X-Force: 8356
Vulnerability Center: 2720 - Microsoft Outlook Client DoS, Medium

Entryinfo

Created: 06/21/2014 11:52
Updated: 04/19/2026 05:36
Changes: 06/21/2014 11:52 (39), 05/16/2019 12:06 (16), 04/19/2026 05:36 (18)
Complete: 🔍
Cache ID: 216::103