Microsoft SharePoint Server 2016/2019/Subscription Edition code injection

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 (≈)
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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.
6.8$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in Microsoft SharePoint Server 2016/2019/Subscription Edition. This vulnerability affects unknown code. The manipulation results in an unknown weakness. This vulnerability is reported as CVE-2023-24955. The attack can be launched remotely. Moreover, an exploit is present. It is best practice to apply a patch to resolve this issue.

Detailsinfo

A vulnerability was found in Microsoft SharePoint Server 2016/2019/Subscription Edition (Groupware Software). It has been classified as critical. CWE is classifying the issue as CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was disclosed 05/09/2023 as confirmed security guidance (Website). The advisory is available at portal.msrc.microsoft.com. This vulnerability is traded as CVE-2023-24955. Technical details are unknown but a public exploit is available. This vulnerability is assigned to T1059 by the MITRE ATT&CK project.

A public exploit has been developed by Valentin Lobstein (Chocapikk) in Python and been published 5 months after the advisory. The exploit is shared for download at github.com. It is declared as attacked. As 0-day the estimated underground price was around $5k-$25k. This issue was added on 03/26/2024 to the CISA Known Exploited Vulnerabilities Catalog with a due date of 04/16/2024:

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

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

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Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.2
VulDB Meta Temp Score: 6.8

VulDB Base Score: 7.2
VulDB Temp Score: 6.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

Vendor Base Score (Microsoft): 7.2
Vendor Vector (Microsoft): 🔍

CNA Base Score: 7.2
CNA Vector (Microsoft): 🔍

CVSSv2info

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

Exploitinginfo

Class: Code injection
CWE: CWE-94 / CWE-74 / CWE-707
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Attacked
Author: Valentin Lobstein (Chocapikk)
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍
KEV Notice: 🔍

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: 🔍
Exploit Delay Time: 🔍

Timelineinfo

01/31/2023 🔍
05/09/2023 +98 days 🔍
05/09/2023 +0 days 🔍
05/09/2023 +0 days 🔍
09/26/2023 +139 days 🔍
09/29/2024 +369 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: portal.msrc.microsoft.com
Status: Confirmed

CVE: CVE-2023-24955 (🔍)
GCVE (CVE): GCVE-0-2023-24955
GCVE (VulDB): GCVE-100-228462
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 05/09/2023 20:17
Updated: 09/29/2024 16:58
Changes: 05/09/2023 20:17 (34), 05/09/2023 20:20 (19), 06/01/2023 14:08 (2), 09/27/2023 15:16 (9), 09/27/2023 15:20 (5), 04/30/2024 16:24 (28), 06/10/2024 17:55 (11), 09/29/2024 16:58 (2)
Complete: 🔍
Committer: misc
Cache ID: 216::103

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