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bash: Fix for CVE-2014-6277 

Follow up bash42-049 to parse properly function definitions in the
values of environment variables, to not allow remote attackers to
execute arbitrary code or to cause a denial of service.

See: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-6277

(From OE-Core daisy rev: 85961bcf81650992259cebb0ef1f1c6cdef3fefa)

(From OE-Core rev: 5a802295d1f40af6f21dd3ed7e4549fe033f03a0)

Signed-off-by: Catalin Popeanga <Catalin.Popeanga@enea.com>
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Catalin Popeanga 2014-10-09 14:24:53 +02:00 committed by Holger Hans Peter Freyther
parent 38c91c440f
commit 731c201426
4 changed files with 90 additions and 0 deletions
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44
meta/recipes-extended/bash/bash-3.2.48/cve-2014-6277.patch Normal file
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@ -0,0 +1,44 @@
bash: Fix CVE-2014-6277 (shellshock)
Upstream-status: backport
Downloaded from:
ftp://ftp.gnu.org/pub/bash/bash-3.2-patches/bash32-056
Author: Chet Ramey <chet.ramey@case.edu>
Signed-off-by: Catalin Popeanga <catalin.popeanga@enea.com>
BASH PATCH REPORT
=================
Bash-Release: 3.2
Patch-ID: bash32-056
Bug-Reported-by: Michal Zalewski <lcamtuf@coredump.cx>
Bug-Reference-ID:
Bug-Reference-URL:
Bug-Description:
When bash is parsing a function definition that contains a here-document
delimited by end-of-file (or end-of-string), it leaves the closing delimiter
uninitialized. This can result in an invalid memory access when the parsed
function is later copied.
---
--- a/make_cmd.c 2006-09-12 09:21:22.000000000 -0400
+++ b/make_cmd.c 2014-10-02 11:41:40.000000000 -0400
@@ -677,4 +677,5 @@
temp->redirector = source;
temp->redirectee = dest_and_filename;
+ temp->here_doc_eof = 0;
temp->instruction = instruction;
temp->flags = 0;
--- a/copy_cmd.c 2003-10-07 11:43:44.000000000 -0400
+++ b/copy_cmd.c 2014-10-02 11:41:40.000000000 -0400
@@ -117,5 +117,5 @@
case r_reading_until:
case r_deblank_reading_until:
- new_redirect->here_doc_eof = savestring (redirect->here_doc_eof);
+ new_redirect->here_doc_eof = redirect->here_doc_eof ? savestring (redirect->here_doc_eof) : 0;
/*FALLTHROUGH*/
case r_reading_string:

44
meta/recipes-extended/bash/bash-4.2/cve-2014-6277.patch Normal file
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@ -0,0 +1,44 @@
bash: Fix CVE-2014-6277 (shellshock)
Upstream-status: backport
Downloaded from:
ftp://ftp.gnu.org/pub/bash/bash-4.3-patches/bash43-029
Author: Chet Ramey <chet.ramey@case.edu>
Signed-off-by: Catalin Popeanga <catalin.popeanga@enea.com>
BASH PATCH REPORT
=================
Bash-Release: 4.3
Patch-ID: bash43-029
Bug-Reported-by: Michal Zalewski <lcamtuf@coredump.cx>
Bug-Reference-ID:
Bug-Reference-URL:
Bug-Description:
When bash is parsing a function definition that contains a here-document
delimited by end-of-file (or end-of-string), it leaves the closing delimiter
uninitialized. This can result in an invalid memory access when the parsed
function is later copied.
---
--- a/make_cmd.c 2011-12-16 08:08:01.000000000 -0500
+++ b/make_cmd.c 2014-10-02 11:24:23.000000000 -0400
@@ -693,4 +693,5 @@
temp->redirector = source;
temp->redirectee = dest_and_filename;
+ temp->here_doc_eof = 0;
temp->instruction = instruction;
temp->flags = 0;
--- a/copy_cmd.c 2009-09-11 16:28:02.000000000 -0400
+++ b/copy_cmd.c 2014-10-02 11:24:23.000000000 -0400
@@ -127,5 +127,5 @@
case r_reading_until:
case r_deblank_reading_until:
- new_redirect->here_doc_eof = savestring (redirect->here_doc_eof);
+ new_redirect->here_doc_eof = redirect->here_doc_eof ? savestring (redirect->here_doc_eof) : 0;
/*FALLTHROUGH*/
case r_reading_string:

1
meta/recipes-extended/bash/bash_3.2.48.bb
View File

@ -16,6 +16,7 @@ SRC_URI = "${GNU_MIRROR}/bash/bash-${PV}.tar.gz;name=tarball \
file://cve-2014-7169.patch \
file://Fix-for-bash-exported-function-namespace-change.patch \
file://cve-2014-7186_cve-2014-7187.patch \
file://cve-2014-6277.patch \
file://run-ptest \
"

1
meta/recipes-extended/bash/bash_4.2.bb
View File

@ -25,6 +25,7 @@ SRC_URI = "${GNU_MIRROR}/bash/${BPN}-${PV}.tar.gz;name=tarball \
file://cve-2014-7169.patch \
file://Fix-for-bash-exported-function-namespace-change.patch;striplevel=0 \
file://cve-2014-7186_cve-2014-7187.patch;striplevel=0 \
file://cve-2014-6277.patch \
file://run-ptest \
"