Buffer overflows on Libvpx when decoding WebM video

Buffer overflows on Libvpx when decoding WebM video

Announced

August 11, 2015

Reporter

Abhishek Arya

Impact

Critical

Products

Firefox, Firefox ESR, Firefox OS, SeaMonkey

Fixed in

• Firefox 40
• Firefox ESR 38.2
• Firefox OS 2.5
• SeaMonkey 2.35

Description

Security researcher Abhishek Arya (Inferno) of the Google Chrome Security Team used the Address Sanitizer tool to discover two buffer overflow issues in the Libvpx library used for WebM video when decoding a malformed WebM video file. These buffer overflows result in potentially exploitable crashes.

References

• Heap-buffer-overflow WRITE in resize_context_buffers (CVE-2015-4485)
• Out of bounds read in decrease_ref_count (CVE-2015-4486)