Use-after-free vulnerability in libwebm through 2018-02-02

CVE-2018-6548 · HIGH Severity

AV:N/AC:L/AU:N/C:P/I:P/A:P

A use-after-free issue was discovered in libwebm through 2018-02-02. If a Vp9HeaderParser was initialized once before, its property frame_ would not be changed because of code in vp9parser::Vp9HeaderParser::SetFrame. Its frame_ could be freed while the corresponding pointer would not be updated, leading to a dangling pointer. This is related to the function OutputCluster in webm_info.cc.

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