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05281ec4a6
Source: binutils-gdb.git MR: 76278 Type: Security Fix Disposition: Backport from binutils-2_29 ChangeID: 05de8bcd22d8d0b54badcd3826cd370b3aed81de Description: x86: Guard against corrupted PLT There should be only one entry in PLT for a given symbol. Set howto to NULL after processing a PLT entry to guard against corrupted PLT so that the duplicated PLT entries are skipped. PR binutils/22170 Affects: <= 2.29 (From OE-Core rev: 51fc4c8d86bc7c567794305bcc08e5054e9e204a) Signed-off-by: Thiruvadi Rajaraman <trajaraman@mvista.com> Reviewed-by: Armin Kuster <akuster@mvista.com> Signed-off-by: Armin Kuster <akuster@mvista.com> Signed-off-by: Armin Kuster <akuster808@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
46 lines
1.5 KiB
Diff
46 lines
1.5 KiB
Diff
commit 61e3bf5f83f7e505b6bc51ef65426e5b31e6e360
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Author: H.J. Lu <hjl.tools@gmail.com>
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Date: Fri Sep 22 14:15:40 2017 -0700
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x86: Guard against corrupted PLT
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There should be only one entry in PLT for a given symbol. Set howto to
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NULL after processing a PLT entry to guard against corrupted PLT so that
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the duplicated PLT entries are skipped.
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PR binutils/22170
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Upstream-Status: Backport
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CVE: CVE-2017-14729
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Signed-off-by: Thiruvadi Rajaraman <trajaraman@mvista.com>
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Index: git/bfd/elf-ifunc.c
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===================================================================
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--- git.orig/bfd/elf-ifunc.c 2017-11-08 12:34:22.063320490 +0530
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+++ git/bfd/elf-ifunc.c 2017-11-08 12:34:29.995404891 +0530
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@@ -473,6 +473,10 @@
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memcpy (names, "@plt", sizeof ("@plt"));
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names += sizeof ("@plt");
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++s, ++n;
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+ /* There should be only one entry in PLT for a given
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+ symbol. Set howto to NULL after processing a PLT
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+ entry to guard against corrupted PLT. */
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+ p->howto = NULL;
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}
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free (plt_sym_val);
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Index: git/bfd/ChangeLog
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===================================================================
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--- git.orig/bfd/ChangeLog 2017-11-08 12:34:29.939404297 +0530
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+++ git/bfd/ChangeLog 2017-11-08 12:35:55.660271599 +0530
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@@ -1,3 +1,9 @@
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+2017-09-22 H.J. Lu <hongjiu.lu@intel.com>
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+
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+ PR binutils/22170
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+ * elf-ifunc.c (elf_get_synthetic_symtab): Guard against
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+ corrupted PLT.
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+
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2017-07-27 Nick Clifton <nickc@redhat.com>
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PR 21840
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