CVE-2023-21687

HTTP.sys Information Disclosure Vulnerability

Severity Score

5.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

HTTP.sys Information Disclosure Vulnerability

*Credits: N/A

CVSS Scores

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Local

Attack Complexity

Low

Authentication

Single

Confidentiality

Complete

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2022-12-13 CVE Reserved
2023-02-14 CVE Published
2025-01-01 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-125: Out-of-bounds Read
CWE-668: Exposure of Resource to Wrong Sphere

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21687	2024-05-29

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Microsoft Search vendor "Microsoft"		Windows 11 21h2 Search vendor "Microsoft" for product "Windows 11 21h2"				< 10.0.22000.1574 Search vendor "Microsoft" for product "Windows 11 21h2" and version " < 10.0.22000.1574"		arm64		Affected
Microsoft Search vendor "Microsoft"		Windows 11 21h2 Search vendor "Microsoft" for product "Windows 11 21h2"				< 10.0.22000.1574 Search vendor "Microsoft" for product "Windows 11 21h2" and version " < 10.0.22000.1574"		x64		Affected
Microsoft Search vendor "Microsoft"		Windows 11 22h2 Search vendor "Microsoft" for product "Windows 11 22h2"				< 10.0.22621.1265 Search vendor "Microsoft" for product "Windows 11 22h2" and version " < 10.0.22621.1265"		arm64		Affected
Microsoft Search vendor "Microsoft"		Windows 11 22h2 Search vendor "Microsoft" for product "Windows 11 22h2"				< 10.0.22621.1265 Search vendor "Microsoft" for product "Windows 11 22h2" and version " < 10.0.22621.1265"		x64		Affected
Microsoft Search vendor "Microsoft"		Windows Server 2022 Search vendor "Microsoft" for product "Windows Server 2022"				-		-		Affected