Microsoft IIS 3.0/4.0 Asian Language Double Byte Code config

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability was found in Microsoft IIS 3.0/4.0. It has been classified as critical. Affected is an unknown function of the component Asian Language Handler. The manipulation as part of Double Byte Code leads to config. This vulnerability is traded as CVE-1999-0725. Furthermore, there is an exploit available. It is recommended to upgrade the affected component. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Detailsinfo

A vulnerability was found in Microsoft IIS 3.0/4.0 (Web Server) and classified as critical. This issue affects some unknown processing of the component Asian Language Handler. The manipulation as part of a Double Byte Code leads to a config vulnerability. Using CWE to declare the problem leads to CWE-16. Impacted is confidentiality. The summary by CVE is:

When IIS is run with a default language of Chinese, Korean, or Japanese, it allows a remote attacker to view the source code of certain files, a.k.a. "Double Byte Code Page".

The issue has been introduced in 05/15/1997. The weakness was presented 08/19/1999 with Microsoft (Website). It is possible to read the advisory at support.microsoft.com. The identification of this vulnerability is CVE-1999-0725. 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. The attack technique deployed by this issue is T1592.004 according to MITRE ATT&CK.

The exploit is available at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 826 days. During that time the estimated underground price was around $25k-$100k.

Upgrading to version 5.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (2302), Exploit-DB (19361), SecurityFocus (BID 477†) and Vulnerability Center (SBV-3055†). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Not Affected

  • Microsoft IIS 2.0

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 6.7

VulDB Base Score: 7.5
VulDB Temp Score: 6.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Config
CWE: CWE-16
CAPEC: 🔍
ATT&CK: 🔍

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: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: IIS 5.0
ISS Proventia IPS: 🔍

Timelineinfo

05/15/1997 🔍
06/24/1999 +770 days 🔍
06/24/1999 +0 days 🔍
08/19/1999 +56 days 🔍
08/19/1999 +0 days 🔍
12/01/2003 +1565 days 🔍
06/21/2014 +3855 days 🔍
02/11/2025 +3888 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: support.microsoft.com
Organization: Microsoft
Status: Confirmed

CVE: CVE-1999-0725 (🔍)
GCVE (CVE): GCVE-0-1999-0725
GCVE (VulDB): GCVE-100-14783
X-Force: 2302 - Microsoft IIS using double-byte code pages could allow remote attackers to retrieve source code
SecurityFocus: 477 - NT IIS Double Byte Code Page Vulnerability
Vulnerability Center: 3055 - [MS99-022] Microsoft IIS Source Code Disclosure in Chinese, Korean and Japanese Default Languages, Low

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

Entryinfo

Created: 06/21/2014 07:27 PM
Updated: 02/11/2025 04:03 AM
Changes: 06/21/2014 07:27 PM (45), 05/17/2019 12:06 PM (23), 02/11/2025 04:03 AM (27)
Complete: 🔍
Cache ID: 18:176:40

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