Description

Integer Overflow to Buffer Overflow vulnerability in Samsung Open Source rlottie allows Overflow Buffers.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "6.5",
  "pubDate": "2026-08-12T03:16:43.083Z",
  "pubdate": "2026-08-12T03:16:43.083Z",
  "executiveSummary": "An Integer Overflow to Buffer Overflow vulnerability has been identified within the Samsung Open Source rlottie library. This memory corruption flaw arises when arithmetic operations on untrusted integer values result in an overflow, subsequently leading to the allocation of an undersized memory buffer. When data is subsequently written to this buffer, a classic buffer overflow condition is triggered.\nThe primary impact of this vulnerability includes memory corruption, potential application crashes, and the theoretical risk of arbitrary code execution within the context of the running process parsing maliciously crafted graphics or animation files. The affected system is Samsung Open Source rlottie across unspecified vulnerable versions.\nThe risk implications are significant for applications utilizing rlottie to render untrusted Lottie animation files, as successful exploitation could lead to denial of service or compromise of the host application integrity. The attacker capabilities involve crafting a malicious input file containing specially manipulated dimension or frame count values designed to trigger the integer overflow during parsing. Exploitation typically requires tricking a user or application into processing the malicious input file, meaning network exposure and exploitation requirements depend heavily on how the vulnerable library is integrated into downstream software products.",
  "technicalDetails": "The vulnerability resides in the Samsung Open Source rlottie parsing engine, specifically within components responsible for handling memory allocation sizes derived from file headers or structural metadata of Lottie animations.\nThe root cause is an unchecked arithmetic operation where input values defining dimensions, frame counts, or structural lengths are multiplied or added. Due to the lack of proper bounds checking and integer overflow validation, the resulting value wraps around to a small integer. This wrapped value is then passed directly as the size argument to a memory allocation function (such as malloc or similar heap allocators).\nConsequently, the system allocates a heap buffer that is significantly smaller than required to hold the subsequent data payload. When the parsing routine proceeds to read and copy input data into this undersized buffer, a heap-based buffer overflow occurs. This overwrites adjacent heap memory structures, corrupting critical metadata used by the memory allocator or overwriting adjacent program variables and function pointers.\nThe attack flow proceeds as follows: 1) The attacker constructs a malicious Lottie file containing carefully manipulated integer values in the header or metadata fields. 2) The victim application utilizes the rlottie library to load and parse the malicious file. 3) The parsing logic performs arithmetic calculations on the malicious integers, causing an integer overflow. 4) An undersized heap buffer is allocated based on the overflowed size. 5) The parsing engine writes data into the buffer, exceeding its boundaries and triggering a buffer overflow. 6) The application experiences abnormal termination resulting in a denial of service, or potentially achieves arbitrary code execution if control data on the heap is successfully manipulated.\nAuthentication requirements, privilege requirements, and network exposure are entirely dependent on the specific implementation and context in which the rlottie library is deployed, as the library itself operates locally within the address space of the calling application."
}