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check bounds in readPICFrame

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Fixes #77
This commit is contained in:
David Howden 2020-11-20 06:25:35 +11:00
parent 53ee65d2ae
commit 6b18201aa5
1 changed files with 4 additions and 0 deletions
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4
id3v2frames.go
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@ -564,6 +564,10 @@ func (p Picture) String() string {
// Description <textstring> $00 (00)
// Picture data <binary data>
func readPICFrame(b []byte) (*Picture, error) {
if len(b) < 5 {
return nil, errors.New("invalid PIC frame")
}
enc := b[0]
ext := string(b[1:4])
picType := b[4]