Mattermost fails to check if a custom emoji reaction exists when sending it to a post and to limit the amount of custom emojis allowed to be added in a post, allowing an attacker sending a huge amount of non-existent custom emojis in a post to crash the mobile app of a user seeing the post and to crash the server due to overloading when clients attempt to retrive the aforementioned post.
{
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/1xxx/CVE-2024-1402.json",
"cwe_ids": [
"CWE-400"
],
"cna_assigner": "Mattermost",
"unresolved_ranges": [
{
"source": "AFFECTED_FIELD",
"extracted_events": [
{
"last_affected": "8.1.7"
},
{
"last_affected": "9.1.4"
},
{
"last_affected": "9.2.3"
}
]
}
]
}{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"source": "CPE_RANGE",
"extracted_events": [
{
"introduced": "0"
},
{
"last_affected": "8.1.7"
},
{
"introduced": "9.0.0"
},
{
"last_affected": "9.1.4"
},
{
"introduced": "9.2.0"
},
{
"last_affected": "9.2.3"
}
]
}