From 0f0fbc07d9be31f5e83ec5328d7311fdfd8328b1 Mon Sep 17 00:00:00 2001 From: Tor Andersson Date: Tue, 19 Sep 2017 16:33:38 +0200 Subject: [PATCH] Fix 698540: Check name, comment and meta size field signs. --- source/fitz/unzip.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/source/fitz/unzip.c b/source/fitz/unzip.c index f2d4f32..0bcce0f 100644 --- a/source/fitz/unzip.c +++ b/source/fitz/unzip.c @@ -141,6 +141,9 @@ static void read_zip_dir_imp(fz_context *ctx, fz_zip_archive *zip, int start_off (void) fz_read_int32_le(ctx, file); /* ext file atts */ offset = fz_read_int32_le(ctx, file); + if (namesize < 0 || metasize < 0 || commentsize < 0) + fz_throw(ctx, FZ_ERROR_GENERIC, "invalid size in zip entry"); + name = fz_malloc(ctx, namesize + 1); n = fz_read(ctx, file, (unsigned char*)name, namesize); if (n < (size_t)namesize) -- 2.9.1