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Advisories

Fraunhofer HHI VVdeC before 3.2.1 Heap Use-After-Free via ALF APS Redefinition

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Severity
medium
Date
Affecting

  • vvdec >= 0, < 3.2.1

CWE
  • CWE-416 Use After Free
CVSS
5.8
CVSS V4 Vector
CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
Credit
Alexander A. Shvedov (sigdevel)
Description
Fraunhofer HHI VVdeC before 3.2.1 contains a heap use-after-free vulnerability that allows attackers to corrupt memory by redefining an ALF adaptation parameter set id still referenced by slices. Attackers can supply a crafted VVC bitstream that, with multithreaded decoding, makes worker threads dereference freed APS objects in CABACReader::readAlf() and AdaptiveLoopFilter::reconstructCoeff(), causing crashes or heap corruption.

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