CVE-2024-29977 Malicious remote can create arbitrary reactions on arbitrary posts

2024-08-0114:05:00

CWE-284

Mattermost

github.com

cve-2024-29977

mattermost

remote reactions

synced reactions

shared channels

CVSS3

2.7

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N

AI Score

7.1

Confidence

High

EPSS

Percentile

14.7%

SSVC

Exploitation

none

Automatable

Technical Impact

partial

JSON

Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6 fail to properly validate synced reactions, when shared channels are enabled, which allows a malicious remote to create arbitrary reactions on arbitrary posts

CNA Affected

[
  {
    "vendor": "Mattermost",
    "product": "Mattermost",
    "versions": [
      {
        "status": "affected",
        "version": "9.9.0"
      },
      {
        "status": "affected",
        "version": "9.5.0",
        "versionType": "semver",
        "lessThanOrEqual": "9.5.6"
      },
      {
        "status": "unaffected",
        "version": "9.10.0"
      },
      {
        "status": "unaffected",
        "version": "9.9.1"
      },
      {
        "status": "unaffected",
        "version": "9.5.7"
      }
    ],
    "defaultStatus": "unaffected"
  }
]