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23 lines
927 B
Diff
23 lines
927 B
Diff
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Fix CVE-2019-19126:
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https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19126
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https://sourceware.org/bugzilla/show_bug.cgi?id=25204
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Taken from upstream:
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https://sourceware.org/git/?p=glibc.git;a=commit;h=37c90e117310728a4ad1eb998c0bbe7d79c4a398
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diff --git a/sysdeps/unix/sysv/linux/x86_64/64/dl-librecon.h b/sysdeps/unix/sysv/linux/x86_64/64/dl-librecon.h
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index 975cbe2..df2cdfd 100644
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--- a/sysdeps/unix/sysv/linux/x86_64/64/dl-librecon.h
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+++ b/sysdeps/unix/sysv/linux/x86_64/64/dl-librecon.h
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@@ -31,7 +31,8 @@
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environment variable, LD_PREFER_MAP_32BIT_EXEC. */
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#define EXTRA_LD_ENVVARS \
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case 21: \
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- if (memcmp (envline, "PREFER_MAP_32BIT_EXEC", 21) == 0) \
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+ if (!__libc_enable_secure \
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+ && memcmp (envline, "PREFER_MAP_32BIT_EXEC", 21) == 0) \
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GLRO(dl_x86_cpu_features).feature[index_arch_Prefer_MAP_32BIT_EXEC] \
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|= bit_arch_Prefer_MAP_32BIT_EXEC; \
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break;
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