Magento Filter extension bypass via crafted store configuration keys
The advisory, in context
A file upload filter bypass exists in Magento 2.1 prior to 2.1.18, Magento 2.2 prior to 2.2.9, Magento 2.3 prior to 2.3.2. This can be exploited by an authenticated user with admin privileges to edit configuration keys to remove file extension filters, potentially resulting in the malicious upload and execution of malicious files on the server.
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 2.1 before 2.1.18
Fixed in 2.1.18
21 explicitly affected versions
2.1.0, 2.1.0-rc1, 2.1.0-rc2, 2.1.0-rc3, 2.1.1, 2.1.10, 2.1.11, 2.1.12, 2.1.13, 2.1.14, 2.1.15, 2.1.16, 2.1.17, 2.1.2, 2.1.3, 2.1.4, 2.1.5, 2.1.6, 2.1.7, 2.1.8, 2.1.9
View affected-version evidence
{
"ranges": [
{
"events": [
{
"introduced": "2.1"
},
{
"fixed": "2.1.18"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.1.0",
"2.1.0-rc1",
"2.1.0-rc2",
"2.1.0-rc3",
"2.1.1",
"2.1.10",
"2.1.11",
"2.1.12",
"2.1.13",
"2.1.14",
"2.1.15",
"2.1.16",
"2.1.17",
"2.1.2",
"2.1.3",
"2.1.4",
"2.1.5",
"2.1.6",
"2.1.7",
"2.1.8",
"2.1.9"
]
}From 2.2 before 2.2.9
Fixed in 2.2.9
9 explicitly affected versions
2.2.0, 2.2.1, 2.2.2, 2.2.3, 2.2.4, 2.2.5, 2.2.6, 2.2.7, 2.2.8
View affected-version evidence
{
"ranges": [
{
"events": [
{
"introduced": "2.2"
},
{
"fixed": "2.2.9"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.2.0",
"2.2.1",
"2.2.2",
"2.2.3",
"2.2.4",
"2.2.5",
"2.2.6",
"2.2.7",
"2.2.8"
]
}From 2.3 before 2.3.2
Fixed in 2.3.2
2 explicitly affected versions
2.3.0, 2.3.1
View affected-version evidence
{
"ranges": [
{
"events": [
{
"introduced": "2.3"
},
{
"fixed": "2.3.2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.3.0",
"2.3.1"
]
}References
- https://nvd.nist.gov/vuln/detail/CVE-2019-7912
- https://github.com/FriendsOfPHP/security-advisories/blob/master/magento/product-community-edition/CVE-2019-7912.yaml
- https://github.com/magento/magento2
- https://web.archive.org/web/20201220124205/https://magento.com/security/patches/magento-2.3.2-2.2.9-and-2.1.18-security-update-33