CVE-2024-24584: Libigl Buffer Overflow Vulnerability

CVE-2024-24584 Overview

CVE-2024-24584 is an out-of-bounds read vulnerability in the readMSH function of libigl v2.5.0, a C++ geometry processing library. The flaw occurs while the parser processes MshLoader::ELEMENT_TET elements within .msh files. An attacker who convinces a user to open a specially crafted .msh file can trigger a read past the intended buffer boundary. The issue was reported by Cisco Talos and tracked as TALOS-2024-1928.

Critical Impact
Processing a malicious .msh file causes an out-of-bounds read in readMSH, potentially leaking process memory or crashing applications that embed libigl.

Affected Products

libigl v2.5.0
Applications embedding the libigl MshLoader component
Downstream geometry processing tools that call readMSH

Discovery Timeline

2024-05-28 - CVE-2024-24584 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-24584

Vulnerability Analysis

The vulnerability resides in libigl's readMSH routine, which parses Gmsh .msh mesh files. When the loader encounters tetrahedral elements identified as MshLoader::ELEMENT_TET, it reads element data without adequately validating that the underlying buffer contains enough bytes to satisfy the read. A crafted .msh file can therefore cause the parser to read beyond the allocated buffer.

The weakness is classified as [CWE-125] Out-of-Bounds Read. Exploitation requires user interaction, since the target must open or import the malicious mesh file, but no privileges are needed on the target system. Impact is limited to confidentiality (potential memory disclosure) with no direct integrity or availability effect reported.

Root Cause

The root cause is missing bounds validation in the MshLoader element-parsing path. The loader trusts element counts and offsets declared in the file header when reading tetrahedron element data. Because file-supplied values are used to index into internal buffers without cross-checking against actual buffer size, malformed files can steer reads outside allocated memory.

Attack Vector

An attacker crafts a .msh file that declares malformed tetrahedral element metadata and delivers it through email, a download link, or an application feature that imports mesh assets. When a victim opens the file with software linking libigl 2.5.0, the readMSH code path performs the out-of-bounds read. Depending on process memory layout, the read can leak adjacent heap contents or terminate the process.

No public proof-of-concept exploit code is available for this issue. Technical details are documented in the Talos Intelligence Vulnerability Report.

Detection Methods for CVE-2024-24584

Indicators of Compromise

Unexpected crashes or segmentation faults in processes that load .msh files through libigl
Presence of .msh files from untrusted sources in user download or project directories
Anomalous memory-read faults logged by AddressSanitizer or similar runtime tooling when parsing mesh assets

Detection Strategies

Inventory applications and build pipelines to identify components linking libigl 2.5.0 or earlier MshLoader code
Instrument development and QA builds with AddressSanitizer to catch out-of-bounds reads in readMSH during file ingestion tests
Alert on process crashes originating from geometry processing binaries handling user-supplied mesh files

Monitoring Recommendations

Monitor endpoint telemetry for repeated crashes of CAD, 3D modeling, or research tooling that consumes .msh input
Log and review inbound .msh files delivered through mail gateways, file shares, or collaboration platforms
Track software bill of materials (SBOM) entries for libigl to flag vulnerable versions across the estate

How to Mitigate CVE-2024-24584

Immediate Actions Required

Identify all internal and third-party software that bundles libigl 2.5.0 and prioritize remediation
Restrict opening of .msh files from untrusted sources until affected components are updated
Rebuild affected applications with sanitizer-enabled QA runs to confirm the parser no longer faults on crafted inputs

Patch Information

No fixed release is referenced in the NVD entry for this CVE. Consult the Talos Intelligence Vulnerability Report and the upstream libigl repository for the latest guidance and any subsequent patches to MshLoader::ELEMENT_TET handling.

Workarounds

Disable or remove .msh import functionality in applications that do not require it
Validate .msh files with a hardened, sandboxed pre-parser before passing them to libigl
Execute mesh processing tools in a low-privilege, isolated environment to limit the impact of memory disclosure

bash

# Configuration example: run mesh import in a restricted sandbox
firejail --noprofile --private --net=none --read-only=/usr \
  ./mesh_tool --import /tmp/untrusted_input.msh