CVE-2025-59734
Description
A flaw was found in FFmpeg. This vulnerability allows a use-after-free write and read via a carefully crafted animation file during SANM (Scaleable Adaptive Network Management) decoding.
Statement
The highest threat of this use-after-free vulnerability in FFmpeg's SANM decoding is to system availability. An attacker on the same network segment could trigger a denial of service by providing a specially crafted animation file, potentially corrupting memory allocator metadata.
Understanding the Weakness (CWE)
Integrity
Technical Impact: Modify Memory
The use of previously freed memory may corrupt valid data, if the memory area in question has been allocated and used properly elsewhere.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
If chunk consolidation occurs after the use of previously freed data, the process may crash when invalid data is used as chunk information.
Confidentiality
Technical Impact: Read Memory
Read operations on freed memory can sometimes leak sensitive information instead of causing a crash
Integrity,Confidentiality,Availability
Technical Impact: Execute Unauthorized Code or Commands
If malicious data is entered before chunk consolidation can take place, it may be possible to take advantage of a write-what-where primitive to execute arbitrary code. If the newly allocated data happens to hold a class, in C++ for example, various function pointers may be scattered within the heap data. If one of these function pointers is overwritten with an address to valid shellcode, execution of arbitrary code can be achieved.
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