Adminer PHP Object Injection issue leads to Denial of Service
The advisory, in context
Adminer 4.8.1, when using Monolog for logging, allows a Denial of Service (memory consumption) via a crafted serialized payload (e.g., using s:1000000000), leading to a PHP Object Injection issue. Remote, unauthenticated attackers can trigger this by sending a malicious serialized object, which forces excessive memory usage, rendering Adminer’s interface unresponsive and causing a server-level DoS. While the server may recover after several minutes, multiple simultaneous requests can cause a complete crash requiring manual intervention.
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.
Earlier releases through 4.8.1 (inclusive)
No fix recorded for this interval.
26 explicitly affected versions
v4.2.0, v4.2.1, v4.2.2, v4.2.3, v4.2.4, v4.2.5, v4.3.0, v4.3.1, v4.4.0, v4.5.0, v4.6.0, v4.6.1, v4.6.2, v4.6.3, v4.7.0, v4.7.1, v4.7.2, v4.7.3, v4.7.4, v4.7.5, v4.7.6, v4.7.7, v4.7.8, v4.7.9, v4.8.0, v4.8.1
View affected-version evidence
{
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "4.8.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"v4.2.0",
"v4.2.1",
"v4.2.2",
"v4.2.3",
"v4.2.4",
"v4.2.5",
"v4.3.0",
"v4.3.1",
"v4.4.0",
"v4.5.0",
"v4.6.0",
"v4.6.1",
"v4.6.2",
"v4.6.3",
"v4.7.0",
"v4.7.1",
"v4.7.2",
"v4.7.3",
"v4.7.4",
"v4.7.5",
"v4.7.6",
"v4.7.7",
"v4.7.8",
"v4.7.9",
"v4.8.0",
"v4.8.1"
]
}