CVE-2024-47540: gstreamer Use of Uninitialized Variable

Vulnerability summary

CVE-2024-47540 is a critical (CVSS 9.8) Use of Uninitialized Variable vulnerability in gstreamer. EPSS estimates a 1.01% chance of exploitation in the next 30 days, higher than 62.3% of scored vulnerabilities.

Timeline

1. 11-12-2024
   PublishedVulnerability first disclosed.
2. 03-11-2025
   Last modifiedVulnerability information updated.

Description

GStreamer is a library for constructing graphs of media-handling components. An uninitialized stack variable vulnerability has been identified in the gst_matroska_demux_add_wvpk_header function within matroska-demux.c. When size < 4, the program calls gst_buffer_unmap with an uninitialized map variable. Then, in the gst_memory_unmap function, the program will attempt to unmap the buffer using the uninitialized map variable, causing a function pointer hijack, as it will jump to mem->allocator->mem_unmap_full or mem->allocator->mem_unmap. This vulnerability could allow an attacker to hijack the execution flow, potentially leading to code execution. This vulnerability is fixed in 1.24.10.

• CWE-457Use of Uninitialized VariableThe code uses a variable that has not been initialized, leading to unpredictable or unintended results.
• CWE-908Use of Uninitialized ResourceThe product uses or accesses a resource that has not been initialized.