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Forgot to check for windows-style path seperator in precaution against directory traversal abuse.
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@ -1445,7 +1445,7 @@ void CL_NextDownload(void) {
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s = localName + strlen(localName); // point at the nul byte
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// Make sure the server cannot make us write to non-quake3 directories.
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if(strstr(localName, "../"))
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if(strstr(localName, "../") || strstr(localName, "..\\"))
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{
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Com_Error(ERR_DROP, "CL_NextDownload: Invalid download name %s", localName);
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return;
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