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muxread: fix out of bounds read

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ChunkVerifyAndAssign() expects to have at least 8 bytes to work with,
but was only checking for the presence of 4.

Change-Id: I8456b15d872de24a90c1e8fbfba463391ced5c7f
This commit is contained in:
James Zern 2014-06-17 19:50:12 +00:00
parent 8b0f6a4802
commit 6e93317f5b
1 changed files with 1 additions and 1 deletions
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2
src/mux/muxread.c
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@ -57,7 +57,7 @@ static WebPMuxError ChunkVerifyAndAssign(WebPChunk* chunk,
WebPData chunk_data; WebPData chunk_data;
// Sanity checks. // Sanity checks.
if (data_size < TAG_SIZE) return WEBP_MUX_NOT_ENOUGH_DATA; if (data_size < CHUNK_HEADER_SIZE) return WEBP_MUX_NOT_ENOUGH_DATA;
chunk_size = GetLE32(data + TAG_SIZE); chunk_size = GetLE32(data + TAG_SIZE);
{ {