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Advisories

flatcc through 0.6.4 Out-of-Bounds Read via verifier check_header

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Severity
medium
Date
Affecting

  • flatcc <= 0.6.4

CWE
  • CWE-190 Integer Overflow or Wraparound
CVSS
6.3
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Credit
HaiND from the Post and Telecommunication Institute of Technology, mikkelfj
Description
flatcc through 0.6.4 contains an integer overflow vulnerability in the check_header function of the FlatBuffers verifier because its overflow guard is dead code. On 32-bit builds, attackers can supply a crafted buffer offset that wraps the bounds check, causing an out-of-bounds read before the buffer and crashing the process.

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