CVE-2024-33768 in lunasvg
Summary
by MITRE • 05/01/2024
lunasvg v2.3.9 was discovered to contain a segmentation violation via the component composition_solid_source_over.
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Analysis
by VulDB Data Team • 05/01/2024
The vulnerability identified as CVE-2024-33768 affects lunasvg version 2.3.9 and represents a critical segmentation fault occurring within the composition_solid_source_over component. This issue manifests as a memory access violation that can lead to arbitrary code execution or system instability when processing maliciously crafted svg files. The flaw exists in the graphics rendering pipeline where the software fails to properly validate input parameters during solid source over composition operations, creating a potential attack surface for remote exploitation.
This vulnerability falls under the category of memory safety issues and can be classified as a buffer overflow or memory corruption vulnerability according to CWE-125. The composition_solid_source_over function appears to mishandle memory allocation or access patterns when processing specific svg composition operations, leading to unauthorized memory access. The segmentation fault occurs during the rendering process when the software attempts to access memory locations that are either unmapped or protected, resulting in a program crash or potential privilege escalation.
The operational impact of this vulnerability extends beyond simple application crashes as it can be exploited to achieve remote code execution in environments where lunasvg is used for svg rendering. Attackers could craft malicious svg files containing specially formatted composition operations that trigger the segmentation fault when processed by vulnerable applications. This presents significant risks in web applications, content management systems, and any software that relies on svg rendering capabilities, particularly in server-side environments where user-uploaded content is processed.
Organizations utilizing lunasvg v2.3.9 should immediately implement mitigations including updating to the latest patched version of the library, implementing input validation for all svg content, and deploying web application firewalls to filter malicious svg files. Additionally, the vulnerability aligns with ATT&CK technique T1203, where adversaries may leverage memory corruption vulnerabilities to execute arbitrary code. System administrators should also consider implementing sandboxing mechanisms and restricting svg processing capabilities in applications that do not require full svg functionality. The fix typically involves proper bounds checking, memory validation, and input sanitization within the composition_solid_source_over function to prevent unauthorized memory access patterns.