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Reject .wem with excess/incorrect data

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This commit is contained in:
bnnm 2022-07-31 15:16:15 +02:00
parent 567c0af18e
commit 6fb54c3429
1 changed files with 8 additions and 0 deletions
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8
src/meta/wwise.c
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@ -767,6 +767,7 @@ static int parse_wwise(STREAMFILE* sf, wwise_header* ww) {
/* parse chunks (reads once linearly) */
{
chunk_t rc = {0};
uint32_t file_size = get_streamfile_size(sf);;
/* chunks are even-aligned and don't need to add padding byte, unlike real RIFFs */
rc.be_size = ww->big_endian;
@ -819,6 +820,13 @@ static int parse_wwise(STREAMFILE* sf, wwise_header* ww) {
/* "JUNK": optional padding for aligment (0-size JUNK exists too) */
/* "akd ": extra info for Wwise? (wave peaks/loudness/HDR envelope?) */
default:
/* mainly for incorrectly ripped wems, but should allow truncated wems
* (could also check that fourcc is ASCII) */
if (rc.offset + rc.size > file_size) {
vgm_logi("WWISE: broken .wem (bad extract?)\n");
goto fail;
}
break;
}
}