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GHSA-59x6-g4jr-4hxc
No affected components available
GeoServer 2, in some configurations, allows remote attackers to execute arbitrary code via java.lang.Runtime.getRuntime().exec in wps:LiteralData within a wps:Execute request, as exploited in the wild in June 2023.
RCE in Jiffle
The Jiffle map algebra language, provided by jai-ext, allows efficiently execute map algebra over large images. A vulnerability CVE-2022-24816 has been recently found in Jiffle, that allows a Code Injection to be performed by properly crafting a Jiffle invocation.
In the case of GeoServer, the injection can be performed from a remote request.
Assessment
GeoTools includes the Jiffle language as part of the gt-process-raster-<version> module, applications using it should check whether it’s possible to provide a Jiffle script from remote, and if so, upgrade or remove the functionality (see also the GeoServer mitigation, below).
The issue is of particular interest for GeoServer users, as GeoServer embeds Jiffle in the base WAR package. Jiffle is available as a OGC function, for usage in SLD rendering transformations.
This allows for a Remote Code Execution in properly crafted OGC requests, as well as from the administration console, when editing SLD files.
Mitigations
In case you cannot upgrade at once, then the following mitigation is strongly recommended:
- Stop GeoServer
- Open the war file, get into
WEB-INF/liband remove thejanino-<version>.jar - Restart GeoServer.
This effectively removes the Jiffle ability to compile scripts in Java code, from any of the potential attack vectors (Janino is the library used to turn the Java code generated from the Jiffle script, into executable bytecode).
GeoServer should still work properly after the removal, but any attempt to use Jiffle will result in an exception.
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information. There is a high impact on the integrity of the data. There is a high impact on the availability of the system.
Active exploitation in the wild has been confirmed. Immediate patching or mitigation is required.
Probability that this vulnerability will be exploited in the wild within the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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