X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=blobdiff_plain;f=sshzlib.c;h=25ccd259b2cd3b14d102691e09ac0990da671cd1;hb=615455a913d5d28c1368406474ae4bb06697bf44;hp=9c80132514f1eb9ea057515ab803edccbfcf5c27;hpb=cd94e3bc3c65e6205867549708c82bec40f55e79;p=PuTTY.git

diff --git a/sshzlib.c b/sshzlib.c
index 9c801325..25ccd259 100644
--- a/sshzlib.c
+++ b/sshzlib.c
@@ -1259,6 +1259,8 @@ int zlib_decompress_block(void *handle, unsigned char *block, int len,
 		goto finished;
 	    nlen = dctx->bits & 0xFFFF;
 	    EATBITS(16);
+	    if (dctx->uncomplen != (nlen ^ 0xFFFF))
+		goto decode_error;
 	    if (dctx->uncomplen == 0)
 		dctx->state = OUTSIDEBLK;	/* block is empty */
 	    else
@@ -1369,6 +1371,7 @@ int main(int argc, char **argv)
 
 const struct ssh_compress ssh_zlib = {
     "zlib",
+    "zlib@openssh.com", /* delayed version */
     zlib_compress_init,
     zlib_compress_cleanup,
     zlib_compress_block,