Mattermost Server up to 4.8.1/4.9.3/4.10.0 Link Hang input validation

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Mattermost Server up to 4.8.1/4.9.3/4.10.0. The affected element is an unknown function of the component Link Handler. The manipulation leads to input validation (Hang). This vulnerability is referenced as CVE-2018-21259. Remote exploitation of the attack is possible. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Mattermost Server up to 4.8.1/4.9.3/4.10.0 and classified as problematic. This issue affects an unknown code of the component Link Handler. The manipulation with an unknown input leads to a input validation vulnerability (Hang). Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is availability. The summary by CVE is:

An issue was discovered in Mattermost Server before 4.10.1, 4.9.4, and 4.8.2. It allows attackers to cause a denial of service (application hang) via a malformed link in a channel.

The weakness was published 06/19/2020 (Website). The advisory is shared at mattermost.com. The identification of this vulnerability is CVE-2018-21259 since 06/19/2020. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available.

Upgrading to version 4.8.2, 4.9.4 or 4.10.1 eliminates this vulnerability.

Similar entries are available at VDB-156956, VDB-156957, VDB-156958 and VDB-156959. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Name: Hang
Class: Input validation / Hang
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Mattermost Server 4.8.2/4.9.4/4.10.1

Timelineinfo

06/19/2020 🔍
06/19/2020 +0 days 🔍
06/19/2020 +0 days 🔍
10/25/2020 +128 days 🔍

Sourcesinfo

Advisory: mattermost.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-21259 (🔍)
GCVE (CVE): GCVE-0-2018-21259
GCVE (VulDB): GCVE-100-156965
See also: 🔍

Entryinfo

Created: 06/19/2020 22:09
Updated: 10/25/2020 14:59
Changes: 06/19/2020 22:09 (40), 06/19/2020 22:14 (17), 10/25/2020 14:59 (1)
Complete: 🔍
Cache ID: 216::103

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