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Commit34e9173

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Force certain "pljava" custom GUCs to be PGC_SUSET.
Future PL/Java versions will closeCVE-2016-0766 by making these GUCsPGC_SUSET. This PostgreSQL change independently mitigates that PL/Javavulnerability, helping sites that update PostgreSQL more frequently thanPL/Java. Back-patch to 9.1 (all supported versions).
1 parent9a3475b commit34e9173

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‎src/backend/utils/misc/guc.c

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@@ -6461,6 +6461,17 @@ init_custom_variable(const char *name,
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!process_shared_preload_libraries_in_progress)
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elog(FATAL,"cannot create PGC_POSTMASTER variables after startup");
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/*
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* Before pljava commit 398f3b876ed402bdaec8bc804f29e2be95c75139
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* (2015-12-15), two of that module's PGC_USERSET variables facilitated
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* trivial escalation to superuser privileges. Restrict the variables to
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* protect sites that have yet to upgrade pljava.
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*/
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if (context==PGC_USERSET&&
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(strcmp(name,"pljava.classpath")==0||
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strcmp(name,"pljava.vmoptions")==0))
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context=PGC_SUSET;
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gen= (structconfig_generic*)guc_malloc(ERROR,sz);
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memset(gen,0,sz);
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