CVE-2025-53011
MaterialX Null Pointer Dereference in MaterialXCore Shader Generation due to Unchecked implGraphOutput
描述
### Summary When parsing shader nodes in a MTLX file, the MaterialXCore code accesses a potentially null pointer, which can lead to crashes with maliciously crafted files. ### Details In `source/MaterialXCore/Material.cpp`, the following code extracts the output nodes for a given implementation graph: ```cpp InterfaceElementPtr impl = materialNodeDef->getImplementation(); if (impl && impl->isA<NodeGraph>()) { NodeGraphPtr implGraph = impl->asA<NodeGraph>(); for (OutputPtr defOutput : materialNodeDef->getOutputs()) { if (defOutput->getType() == MATERIAL_TYPE_STRING) { OutputPtr implGraphOutput = implGraph->getOutput(defOutput->getName()); for (GraphIterator it = implGraphOutput->traverseGraph().begin(); it != GraphIterator::end(); ++it) { ElementPtr upstreamElem = it.getUpstreamElement(); if (!upstreamElem) { it.setPruneSubgraph(true); continue; } NodePtr upstreamNode = upstreamElem->asA<Node>(); if (upstreamNode && upstream ``` However, when defining the `implGraphOutput` variable by getting the output node, the code doesn't check whether its value is null before accessing its iterator `traverseGraph()`. This leads to a potential null pointer dereference. ### PoC Please download `nullptr_implgraph.mtlx` from the following link: https://github.com/ShielderSec/poc/tree/main/CVE-2025-53011 `build/bin/MaterialXView --material nullptr_implgraph.mtlx` ### Impact An attacker could intentionally crash a target program that uses MaterialX by sending a malicious MTLX file.
如何修補 CVE-2025-53011
要修補 CVE-2025-53011,請將受影響套件升級到下列已修補版本。
- —升級至 1.39.3 或更新版本
- —升級至 1.39.3 或更新版本
CVE-2025-53011 正在被利用嗎?
低 — EPSS 為 0.5%,目前沒有觀察到大規模利用活動。