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Advisories

FFmpeg through 9.0.2 Infinite Loop Denial of Service via IMC/IAC Decoder

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Severity
medium
Date
Affecting

  • FFmpeg <= 9.0.2

CWE
  • CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')
CVSS
6.8
CVSS V4 Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Credit
Joshua Rogers (AISLE Research), Michael Niedermayer
Description
FFmpeg through 9.0.2 contains an infinite loop vulnerability in bit_allocation() in libavcodec/imc.c that allows attackers to hang decoding by supplying audio blocks with a negative bit budget. Attackers can craft IMC or IAC audio files that drive freebits negative, causing the reduction loop to never terminate and consuming 100% CPU.

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