Description

Heap-based buffer overflow vulnerability in Samsung Opensource rlottie allows Buffer Overflow via Environment Variables. This issue affects rlottie: e57b094f03c39a751a1fded6f7d6c13f1ed95ec9.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "5.5",
  "pubDate": "2026-10-11T22:16:50.787Z",
  "pubdate": "2026-10-11T22:16:50.787Z",
  "executiveSummary": "A heap-based buffer overflow vulnerability exists in Samsung's rlottie library, specifically within commit e57b094f03c39a751a1fded6f7d6c13f1ed95ec9.\nThe vulnerability is triggered via the improper handling of environment variables, which can lead to memory corruption.\nThe primary risk involves unauthorized memory modification, which may lead to application crashes or arbitrary code execution depending on the execution context of the rlottie process.\nThe vulnerability is exploitable by an attacker capable of manipulating the environment variables associated with the application utilizing the affected library.\nGiven the nature of heap-based overflows, the potential for reliable exploitation exists, necessitating urgent remediation for any software integrating this version of rlottie.",
  "technicalDetails": "The vulnerability originates from unsafe interaction with environment variables during the initialization or runtime execution of the rlottie library. In C/C++ environments, reading environment variables into fixed-size heap buffers without adequate bounds checking or length validation facilitates an out-of-bounds write condition.\nThe root cause is identified as an insufficient validation mechanism during the processing of system environment variables. When the library attempts to read a specific environment variable, it does not perform a secure check on the length of the input data relative to the destination buffer allocated on the heap.\nThe exploitation flow begins with an attacker successfully influencing the environment configuration of the target process. This is often achieved through local access or via an application that inherits the environment from a compromised process. Upon reaching the vulnerable code path where the environment variable is fetched and copied into the heap buffer, the excess data overflows the designated memory region.\nThis overflow overwrites adjacent heap metadata or adjacent heap objects. By carefully crafting the contents of the environment variable, an attacker can manipulate heap structures to gain control over pointers or function pointers stored within the heap. This corruption effectively subverts the control flow of the application when the corrupted pointers are subsequently dereferenced or invoked by the library.\nThis vulnerability affects commit hash e57b094f03c39a751a1fded6f7d6c13f1ed95ec9 of rlottie. Exploitation does not require prior authentication if the application utilizing the library is accessible in a way that allows environment variable manipulation, although privilege requirements depend entirely on the execution context of the parent application. The post-exploitation impact includes the ability to execute arbitrary code within the security context of the affected process, potentially leading to privilege escalation or unauthorized data access.\nBecause the heap is a dynamic memory area, successful exploitation typically involves bypassing heap layout randomization (ASLR) and leveraging memory primitives to redirect instruction pointers. The lack of strict bounds checking on data derived from external sources—in this case, environment variables—represents a critical oversight in the memory management logic of the affected component."
}