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openSUSE:Maintenance:6595
tigervnc.openSUSE_Leap_42.1_Update
U_tigervnc-fix-checkNoWait-logic-in-SSecurityPl...
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File U_tigervnc-fix-checkNoWait-logic-in-SSecurityPlain.patch of Package tigervnc.openSUSE_Leap_42.1_Update
Git-commit: 9801c5efcf8c1774d9c807ebd5d27ac7049ad993 Patch-Mainline: Upstream References: bnc#1031879 From: Michal Srb <michalsrb@gmail.com> Subject: Fix checkNoWait logic in SSecurityPlain. Currently it proceeds only if there aren't enough data in queue and then it blocks waiting. Also the required amount to receive from network is (ulen + plen), not (ulen + plen + 2). This allowed not authenticated clients to deny service to everyone. diff --git a/common/rfb/SSecurityPlain.cxx b/common/rfb/SSecurityPlain.cxx index f5a5cc7..0531549 100644 --- a/common/rfb/SSecurityPlain.cxx +++ b/common/rfb/SSecurityPlain.cxx @@ -92,7 +92,7 @@ bool SSecurityPlain::processMsg(SConnection* sc) } if (state == 1) { - if (is->checkNoWait(ulen + plen + 2)) + if (!is->checkNoWait(ulen + plen)) return false; state = 2; pw = new char[plen + 1];
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