8.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
0.001 Low
EPSS
Percentile
29.6%
Graylog is a free and open log management platform. Starting in version 2.0.0 and prior to versions 5.1.11 and 5.2.4, arbitrary classes can be loaded and instantiated using a HTTP PUT request to the /api/system/cluster_config/
endpoint. Graylog’s cluster config system uses fully qualified class names as config keys. To validate the existence of the requested class before using them, Graylog loads the class using the class loader. If a user with the appropriate permissions performs the request, arbitrary classes with 1-arg String constructors can be instantiated. This will execute arbitrary code that is run during class instantiation. In the specific use case of java.io.File
, the behavior of the internal web-server stack will lead to information exposure by including the entire file content in the response to the REST request. Versions 5.1.11 and 5.2.4 contain a fix for this issue.
[
{
"vendor": "Graylog2",
"product": "graylog2-server",
"versions": [
{
"version": ">= 2.0.0, < 5.1.11",
"status": "affected"
},
{
"version": ">= 5.2.0, < 5.2.4",
"status": "affected"
}
]
}
]
github.com/Graylog2/graylog2-server/blob/e458db8bf4f789d4d19f1b37f0263f910c8d036c/graylog2-server/src/main/java/org/graylog2/rest/resources/system/ClusterConfigResource.java#L208-L214
github.com/Graylog2/graylog2-server/commit/75ef2b8d60e7d67f859b79fe712c8ae7b2e861d8
github.com/Graylog2/graylog2-server/commit/7f8ef7fa8edf493106d5ef6f777d4da02c5194d9
github.com/Graylog2/graylog2-server/security/advisories/GHSA-p6gg-5hf4-4rgj