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1c1243b6fc
The LD_HWCAP_MASK environment variable may alter the selection of function variants for some architectures. For AT_SECURE process it means that if an outdated routine has a bug that would otherwise not affect newer platforms by default, LD_HWCAP_MASK will allow that bug to be exploited. To be on the safe side, ignore and disable LD_HWCAP_MASK for setuid binaries. [BZ #21209] * elf/rtld.c (process_envvars): Ignore LD_HWCAP_MASK for AT_SECURE processes. * sysdeps/generic/unsecvars.h: Add LD_HWCAP_MASK. * elf/tst-env-setuid.c (test_parent): Test LD_HWCAP_MASK. (test_child): Likewise. * elf/Makefile (tst-env-setuid-ENV): Add LD_HWCAP_MASK.
35 lines
1.1 KiB
C
35 lines
1.1 KiB
C
#if !HAVE_TUNABLES
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# define GLIBC_TUNABLES_ENVVAR "GLIBC_TUNABLES\0"
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#else
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# define GLIBC_TUNABLES_ENVVAR
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#endif
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/* Environment variable to be removed for SUID programs. The names are
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all stuffed in a single string which means they have to be terminated
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with a '\0' explicitly. */
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#define UNSECURE_ENVVARS \
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"GCONV_PATH\0" \
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"GETCONF_DIR\0" \
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GLIBC_TUNABLES_ENVVAR \
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"HOSTALIASES\0" \
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"LD_AUDIT\0" \
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"LD_DEBUG\0" \
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"LD_DEBUG_OUTPUT\0" \
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"LD_DYNAMIC_WEAK\0" \
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"LD_HWCAP_MASK\0" \
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"LD_LIBRARY_PATH\0" \
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"LD_ORIGIN_PATH\0" \
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"LD_PRELOAD\0" \
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"LD_PROFILE\0" \
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"LD_SHOW_AUXV\0" \
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"LD_USE_LOAD_BIAS\0" \
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"LOCALDOMAIN\0" \
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"LOCPATH\0" \
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"MALLOC_TRACE\0" \
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"NIS_PATH\0" \
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"NLSPATH\0" \
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"RESOLV_HOST_CONF\0" \
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"RES_OPTIONS\0" \
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"TMPDIR\0" \
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"TZDIR\0"
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