undefined/exif_9286_user_comment.go: Validate for minimum user-notes size

2020-05-02 16:24:00 -04:00 · 2020-05-02 16:24:00 -04:00 · 80e3b12b98
parent 45986dbda3
commit 80e3b12b98
1 changed files with 4 additions and 0 deletions
--- a/v2/undefined/exif_9286_user_comment.go
+++ b/v2/undefined/exif_9286_user_comment.go
@ -105,6 +105,10 @@ func (Codec9286UserComment) Decode(valueContext *exifcommon.ValueContext) (value
    valueBytes, err := valueContext.ReadBytes()
    log.PanicIf(err)

+    if len(valueBytes) < 8 {
+        return nil, ErrUnparseableValue
+    }
+
    unknownUc := Tag9286UserComment{
        EncodingType:  TagUndefinedType_9286_UserComment_Encoding_UNDEFINED,
        EncodingBytes: []byte{},