The TYPO3 CMS Backend has Broken Authentication in Backend MFA
The advisory, in context
Problem
The multifactor authentication (MFA) dialog presented during backend login can be bypassed due to insufficient enforcement of access restrictions on all backend routes.
Successful exploitation requires valid backend user credentials, as MFA can only be bypassed after successful authentication.
Solution
Update to TYPO3 versions 12.4.31 LTS, 13.4.12 LTS that fix the problem described.
Credits
Thanks to Jens Jacobsen and Y. Kahveci for reporting this issue, and to TYPO3 security team member Torben Hansen for fixing it.
Affected packages
Start with the recorded fix for your release branch. Check your installed version and test compatibility before upgrading. Fixing this advisory does not rule out other vulnerabilities in the release.
From 12.0.0 before 12.4.31
Fixed in 12.4.31
38 explicitly affected versions
v12.0.0, v12.1.0, v12.1.1, v12.1.2, v12.1.3, v12.2.0, v12.3.0, v12.4.0, v12.4.1, v12.4.10, v12.4.11, v12.4.12, v12.4.13, v12.4.14, v12.4.15, v12.4.16, v12.4.17, v12.4.18, v12.4.19, v12.4.2, v12.4.20, v12.4.21, v12.4.22, v12.4.23, v12.4.24, v12.4.25, v12.4.26, v12.4.27, v12.4.28, v12.4.29, v12.4.3, v12.4.30, v12.4.4, v12.4.5, v12.4.6, v12.4.7, v12.4.8, v12.4.9
View affected-version evidence
{
"ranges": [
{
"events": [
{
"introduced": "12.0.0"
},
{
"fixed": "12.4.31"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"v12.0.0",
"v12.1.0",
"v12.1.1",
"v12.1.2",
"v12.1.3",
"v12.2.0",
"v12.3.0",
"v12.4.0",
"v12.4.1",
"v12.4.10",
"v12.4.11",
"v12.4.12",
"v12.4.13",
"v12.4.14",
"v12.4.15",
"v12.4.16",
"v12.4.17",
"v12.4.18",
"v12.4.19",
"v12.4.2",
"v12.4.20",
"v12.4.21",
"v12.4.22",
"v12.4.23",
"v12.4.24",
"v12.4.25",
"v12.4.26",
"v12.4.27",
"v12.4.28",
"v12.4.29",
"v12.4.3",
"v12.4.30",
"v12.4.4",
"v12.4.5",
"v12.4.6",
"v12.4.7",
"v12.4.8",
"v12.4.9"
]
}From 13.0.0 before 13.4.12
Fixed in 13.4.12
19 explicitly affected versions
v13.0.0, v13.0.1, v13.1.0, v13.1.1, v13.2.1, v13.3.0, v13.3.1, v13.4.0, v13.4.1, v13.4.10, v13.4.11, v13.4.2, v13.4.3, v13.4.4, v13.4.5, v13.4.6, v13.4.7, v13.4.8, v13.4.9
View affected-version evidence
{
"ranges": [
{
"events": [
{
"introduced": "13.0.0"
},
{
"fixed": "13.4.12"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"v13.0.0",
"v13.0.1",
"v13.1.0",
"v13.1.1",
"v13.2.1",
"v13.3.0",
"v13.3.1",
"v13.4.0",
"v13.4.1",
"v13.4.10",
"v13.4.11",
"v13.4.2",
"v13.4.3",
"v13.4.4",
"v13.4.5",
"v13.4.6",
"v13.4.7",
"v13.4.8",
"v13.4.9"
]
}