It was discovered that the Mumble client supported websites for public servers with arbitrary URL schemes. If a user were tricked into visiting a malicious website from the public server list, a remote attacker could possibly execute arbitrary code.
{
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "mumble",
"binary_version": "1.2.12-1ubuntu1+esm1"
},
{
"binary_name": "mumble-server",
"binary_version": "1.2.12-1ubuntu1+esm1"
}
]
}
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5195-2.json"
{
"cves": [
{
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"id": "CVE-2021-27229"
}
],
"ecosystem": "Ubuntu:Pro:16.04:LTS"
}