CVE-2024-39839: Github.com/mattermost/mattermost/server/v8 Mattermost Allows A User On Vulnerability
MODERATECVE-2024-39839 is a MODERATE (CVSS 4.3) mattermost allows a user on vulnerability (CWE-284: Improper Access Control) affecting Github.com/mattermost/mattermost/server/v8 libraries in the Go ecosystem. The issue involves mattermost allows a user on a remote to set their remote username prop to an arbitrary string. Remediation is available by upgrading affected packages to version 9.5.7, 9.7.6, 9.8.2, 9.9.1.
CVE-2024-39839 at a Glance
Security Impact
CVSS: 4.3
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N).
How to Fix CVE-2024-39839
To remediate this vulnerability, upgrade all affected Github.com/mattermost/mattermost/server/v8 dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Upgrade github.com/mattermost/mattermost/server/v8 to 9.5.7Upgrade github.com/mattermost/mattermost/server/v8 to 9.7.6Upgrade github.com/mattermost/mattermost/server/v8 to 9.8.2Upgrade github.com/mattermost/mattermost/server/v8 to 9.9.1Run the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for github.com/mattermost/mattermost/server/v8How to Check if You Are Affected
To determine whether your application is affected by CVE-2024-39839, inspect your project dependencies for Github.com/mattermost/mattermost/server/v8:
inspect dependencies for github.com/mattermost/mattermost/server/v8Analyze the terminal output to locate any version of Github.com/mattermost/mattermost/server/v8 in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 9.5.7), your application is affected.
Note: Verify declared build manifests and deployed runtime container environments.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-284: Improper Access Control, where the product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. In Github.com/mattermost/mattermost/server/v8, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2024-39839 Affected Github.com/mattermost/mattermost/server/v8 Versions
4 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
github.com/mattermost/mattermost/server/v8
|
Go |
≥ 9.5.0
< 9.5.7
|
9.5.7
|
|
github.com/mattermost/mattermost/server/v8
|
Go |
≥ 9.7.0
< 9.7.6
|
9.7.6
|
|
github.com/mattermost/mattermost/server/v8
|
Go |
≥ 9.8.0
< 9.8.2
|
9.8.2
|
|
github.com/mattermost/mattermost/server/v8
|
Go |
≥ 9.9.0
< 9.9.1
All 1 versions
9.9.0
|
9.9.1
|
References
Frequently Asked Questions
What is CVE-2024-39839?
Which Github.com/mattermost/mattermost/server/v8 versions are affected?
What version fixes CVE-2024-39839?
Is github.com/mattermost/mattermost/server/v8 affected?
What is the CVSS score of CVE-2024-39839?
What CWE is associated with CVE-2024-39839?
How can I check Go dependencies for CVE-2024-39839?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-vg6q-84p8-qvqh",
"modified" : "2024-08-07T19:33:19Z",
"published" : "2024-08-01T15:32:23Z",
"aliases" : [ "CVE-2024-39839" ],
"summary" : "Mattermost allows a user on a remote to set their remote username prop to an arbitrary string",
"details" : "Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6, 9.7.x <= 9.7.5, 9.8.x <= 9.8.1 fail to disallow users to set their own remote username, when shared channels were enabled, which allows a user on a remote to set their remote username prop to an arbitrary string, which would be then synced to the local server as long as the user hadn't been synced before.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"
}, {
"type" : "CVSS_V4",
"score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost/server/v8"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "9.5.0"
}, {
"fixed" : "9.5.7"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost/server/v8"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "9.7.0"
}, {
"fixed" : "9.7.6"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost/server/v8"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "9.8.0"
}, {
"fixed" : "9.8.2"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost/server/v8"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "9.9.0"
}, {
"fixed" : "9.9.1"
} ]
} ],
"versions" : [ "9.9.0" ]
} ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-39839"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/mattermost/mattermost"
}, {
"type" : "WEB",
"url" : "https://mattermost.com/security-updates"
}, {
"type" : "WEB",
"url" : "https://pkg.go.dev/vuln/GO-2024-3024"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-284" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2024-08-02T01:18:32Z",
"nvd_published_at" : "2024-08-01T15:15:12Z"
}
}