VDB-255235 · CVE-2024-24988 · GCVE-0-2024-24988

Mattermost Server up to 8.1.8/9.2.4/9.3.0 User Status emoji resource consumption

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.
5.0	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Mattermost Server up to 8.1.8/9.2.4/9.3.0. This affects an unknown part of the component User Status Handler. This manipulation of the argument emoji causes resource consumption. This vulnerability is registered as CVE-2024-24988. Remote exploitation of the attack is possible. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Mattermost Server up to 8.1.8/9.2.4/9.3.0 and classified as problematic. Affected by this vulnerability is an unknown functionality of the component User Status Handler. The manipulation of the argument emoji with an unknown input leads to a resource consumption vulnerability. The CWE definition for the vulnerability is CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. As an impact it is known to affect availability. The summary by CVE is:

Mattermost fails to properly validate the length of the emoji value in the custom user status, allowing an attacker to send multiple times a very long string as an emoji value causing high resource consumption and possibly crashing the server.

The weakness was published 02/29/2024 by Gian Klug. It is possible to read the advisory at mattermost.com. This vulnerability is known as CVE-2024-24988 since 02/26/2024. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

Upgrading to version 8.1.9, 9.2.5, 9.3.1 or 9.4.0 eliminates this vulnerability.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Groupware Software

Vendor

Mattermost

Name

Server

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.0
VulDB Meta Temp Score: 5.0

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CNA Base Score: 4.3
CNA Vector (Mattermost, Inc.): 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Resource consumption
CWE: CWE-400 / 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
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Server 8.1.9/9.2.5/9.3.1/9.4.0

Timelineinfo

02/26/2024 🔍
02/29/2024 +3 days 🔍
02/29/2024 +0 days 🔍
01/10/2025 +316 days 🔍

Sourcesinfo

Advisory: mattermost.com
Researcher: Gian Klug
Status: Confirmed

CVE: CVE-2024-24988 (🔍)
GCVE (CVE): GCVE-0-2024-24988
GCVE (VulDB): GCVE-100-255235

Entryinfo

Created: 02/29/2024 09:49
Updated: 01/10/2025 17:06
Changes: 02/29/2024 09:49 (51), 02/29/2024 09:51 (1), 01/10/2025 17:06 (28)
Complete: 🔍
Cache ID: 216::103