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2482f8b8dc
Security fixes for: * CVE-2019-8287 * CVE-2019-15678 * CVE-2019-15679 * CVE-2019-15680 mostly adapted from patches fixing similar issues in the actively maintained libvnc (#73970)
19 lines
651 B
Diff
19 lines
651 B
Diff
Adapted from https://github.com/LibVNC/libvncserver/commit/c5ba3fee85a7ecbbca1df5ffd46d32b92757bc2a
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diff --git a/vncviewer/rfbproto.c b/vncviewer/rfbproto.c
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index 04b0230..47a6863 100644
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--- a/vncviewer/rfbproto.c
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+++ b/vncviewer/rfbproto.c
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@@ -1217,6 +1217,12 @@ HandleRFBServerMessage()
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if (serverCutText)
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free(serverCutText);
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+ if (msg.sct.length > 1<<20) {
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+ fprintf(stderr,"Ignoring too big cut text length sent by server: %u B > 1 MB\n",
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+ (unsigned int)msg.sct.length);
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+ return False;
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+ }
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+
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serverCutText = malloc(msg.sct.length+1);
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if (!ReadFromRFBServer(serverCutText, msg.sct.length))
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