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home:Alexander_Naumov:SLE-12:Update
LibVNCServer.17331
LibVNCServer-CVE-2019-20788.patch
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File LibVNCServer-CVE-2019-20788.patch of Package LibVNCServer.17331
Index: libvncserver-LibVNCServer-0.9.12/libvncclient/rfbproto.c =================================================================== --- libvncserver-LibVNCServer-0.9.12.orig/libvncclient/rfbproto.c 2019-01-06 20:09:30.000000000 +0100 +++ libvncserver-LibVNCServer-0.9.12/libvncclient/rfbproto.c 2020-04-27 10:32:26.192984242 +0200 @@ -225,6 +225,7 @@ ClearServer2Client(rfbClient* client, in client->supportedMessages.server2client[((messageType & 0xFF)/8)] &= (!(1<<(messageType % 8))); } +#define MAX_TEXTCHAT_SIZE 10485760 /* 10MB */ void DefaultSupportedMessages(rfbClient* client) @@ -2268,6 +2269,8 @@ HandleRFBServerMessage(rfbClient* client client->HandleTextChat(client, (int)rfbTextChatFinished, NULL); break; default: + if(msg.tc.length > MAX_TEXTCHAT_SIZE) + return FALSE; buffer=malloc(msg.tc.length+1); if (!ReadFromRFBServer(client, buffer, msg.tc.length)) {
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