Microsoft Windows up to Server 2025 SPNEGO Extended Negotiation use after free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.4$25k-$100k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Microsoft Windows. This impacts an unknown function of the component SPNEGO Extended Negotiation. Such manipulation leads to use after free. This vulnerability is referenced as CVE-2025-21295. It is possible to launch the attack remotely. No exploit is available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability was found in Microsoft Windows and classified as critical. Affected by this issue is an unknown functionality of the component SPNEGO Extended Negotiation. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is confidentiality, integrity, and availability. CVE summarizes:

SPNEGO Extended Negotiation (NEGOEX) Security Mechanism Remote Code Execution Vulnerability

The weakness was published 01/14/2025 as confirmed security update guide (Website). The advisory is shared for download at msrc.microsoft.com. This vulnerability is handled as CVE-2025-21295. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $25k-$100k (estimation calculated on 01/25/2025).

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.1
VulDB Meta Temp Score: 7.4

VulDB Base Score: 8.1
VulDB Temp Score: 7.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

Vendor Base Score (Microsoft): 8.1
Vendor Vector (Microsoft): 🔍

CNA Base Score: 8.1
CNA Vector (Microsoft): 🔍

CVSSv2info

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

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfo

01/14/2025 🔍
01/14/2025 +0 days 🔍
01/14/2025 +0 days 🔍
01/25/2025 +11 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: msrc.microsoft.com
Status: Confirmed

CVE: CVE-2025-21295 (🔍)
GCVE (CVE): GCVE-0-2025-21295
GCVE (VulDB): GCVE-100-291740
scip Labs: https://www.scip.ch/en/?labs.20161215

Entryinfo

Created: 01/14/2025 19:51
Updated: 01/25/2025 09:36
Changes: 01/14/2025 19:51 (35), 01/14/2025 19:55 (34), 01/25/2025 09:36 (12)
Complete: 🔍
Cache ID: 216::103

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