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Diffstat (limited to 'ui/vnc.c')
-rw-r--r--ui/vnc.c13
1 files changed, 10 insertions, 3 deletions
diff --git a/ui/vnc.c b/ui/vnc.c
index 14a86c36ce..19ce988f55 100644
--- a/ui/vnc.c
+++ b/ui/vnc.c
@@ -2165,13 +2165,20 @@ static int protocol_client_msg(VncState *vs, uint8_t *data, size_t len)
pointer_event(vs, read_u8(data, 1), read_u16(data, 2), read_u16(data, 4));
break;
case VNC_MSG_CLIENT_CUT_TEXT:
- if (len == 1)
+ if (len == 1) {
return 8;
-
+ }
if (len == 8) {
uint32_t dlen = read_u32(data, 4);
- if (dlen > 0)
+ if (dlen > (1 << 20)) {
+ error_report("vnc: client_cut_text msg payload has %u bytes"
+ " which exceeds our limit of 1MB.", dlen);
+ vnc_client_error(vs);
+ break;
+ }
+ if (dlen > 0) {
return 8 + dlen;
+ }
}
client_cut_text(vs, read_u32(data, 4), data + 8);