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Disable LD_BIND_NOT for setugid processes.

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Requested by:	jilles
Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks
This commit is contained in:
Konstantin Belousov 2017-03-15 23:47:19 +00:00
parent c05cc0d6c8
commit 018865f8e8
1 changed files with 3 additions and 3 deletions
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6
libexec/rtld-elf/rtld.c
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@ -417,8 +417,6 @@ _rtld(Elf_Addr *sp, func_ptr_type *exit_proc, Obj_Entry **objp)
md_abi_variant_hook(aux_info);
ld_bind_now = getenv(_LD("BIND_NOW"));
if (ld_bind_now == NULL)
ld_bind_not = getenv(_LD("BIND_NOT")) != NULL;
/*
* If the process is tainted, then we un-set the dangerous environment
@ -429,7 +427,7 @@ _rtld(Elf_Addr *sp, func_ptr_type *exit_proc, Obj_Entry **objp)
if (!trust) {
if (unsetenv(_LD("PRELOAD")) || unsetenv(_LD("LIBMAP")) ||
unsetenv(_LD("LIBRARY_PATH")) || unsetenv(_LD("LIBRARY_PATH_FDS")) ||
unsetenv(_LD("LIBMAP_DISABLE")) ||
unsetenv(_LD("LIBMAP_DISABLE")) || unsetenv(_LD("BIND_NOT")) ||
unsetenv(_LD("DEBUG")) || unsetenv(_LD("ELF_HINTS_PATH")) ||
unsetenv(_LD("LOADFLTR")) || unsetenv(_LD("LIBRARY_PATH_RPATH"))) {
_rtld_error("environment corrupt; aborting");
@ -437,6 +435,8 @@ _rtld(Elf_Addr *sp, func_ptr_type *exit_proc, Obj_Entry **objp)
}
}
ld_debug = getenv(_LD("DEBUG"));
if (ld_bind_now == NULL)
ld_bind_not = getenv(_LD("BIND_NOT")) != NULL;
libmap_disable = getenv(_LD("LIBMAP_DISABLE")) != NULL;
libmap_override = getenv(_LD("LIBMAP"));
ld_library_path = getenv(_LD("LIBRARY_PATH"));