avcodec/ffv1dec: check global header version

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
12 years ago · 20b965a1a4
parent 259292f9d4
commit 20b965a1a4
1 changed files with 4 additions and 0 deletions
--- a/libavcodec/ffv1dec.c
+++ b/libavcodec/ffv1dec.c
@ -483,6 +483,10 @@ static int read_extra_header(FFV1Context *f)
    ff_build_rac_states(c, 0.05 * (1LL << 32), 256 - 8);

    f->version = get_symbol(c, state, 0);
+    if (f->version < 2) {
+        av_log(f->avctx, AV_LOG_ERROR, "Invalid version in global header\n");
+        return AVERROR_INVALIDDATA;
+    }
    if (f->version > 2) {
        c->bytestream_end -= 4;
        f->micro_version = get_symbol(c, state, 0);