Package: unar Version: 1.2-1 Severity: normal Tags: patch Dear Maintainer,
The CPPFLAGS hardening flags are missing for .m and .cpp files
because they are not enabled for all *FLAGS in the Makefile. For
more hardening information please have a look at [1], [2] and
[3].
The attached patch is an updated version of
pass-cppflags-for-fortify-functions.patch which fixes the issue.
The revised version should be sent to upstream.
CPPFLAGS are preprocessor flags and should be used for all source
files which use a preprocessor, this includes .m and .cpp files.
To check if all flags were correctly enabled you can use
`hardening-check` from the hardening-includes package and check
the build log with `blhc` (hardening-check doesn't catch
everything):
$ hardening-check /usr/bin/unar /usr/bin/lsar
/usr/bin/unar:
Position Independent Executable: no, normal executable!
Stack protected: yes
Fortify Source functions: yes (some protected functions found)
Read-only relocations: yes
Immediate binding: no not found!
/usr/bin/lsar:
Position Independent Executable: no, normal executable!
Stack protected: yes
Fortify Source functions: yes (some protected functions found)
Read-only relocations: yes
Immediate binding: no not found!
You can see the difference if you add --verbose and check it
without and with the patch.
(Position Independent Executable and Immediate binding is not
enabled by default.)
Use find -type f \( -executable -o -name \*.so\* \) -exec
hardening-check {} + on the build result to check all files.
Regards,
Simon
[1]: https://wiki.debian.org/ReleaseGoals/SecurityHardeningBuildFlags
[2]: https://wiki.debian.org/HardeningWalkthrough
[3]: https://wiki.debian.org/Hardening
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Description: Pass CPPFLAGS to use hardening flags, fortify functions. Forwarded: http://code.google.com/p/theunarchiver/issues/detail?id=529 Author: Julián Moreno Patiño <[email protected]> Last-Update: 2012-09-08 Index: unar-1.2/UniversalDetector/Makefile.linux =================================================================== --- unar-1.2.orig/UniversalDetector/Makefile.linux 2012-09-06 14:02:39.000000000 +0200 +++ unar-1.2/UniversalDetector/Makefile.linux 2012-09-13 12:47:53.051756723 +0200 @@ -31,9 +31,9 @@ AUTODEPENDENCY_CFLAGS=-MMD -MF$(@:.o=.d) -MT$@ -ALL_OBJCFLAGS = $(OBJC_OPTS) $(GCC_OPTS) $(GNUSTEP_OPTS) $(OBJCFLAGS) -ALL_CFLAGS = $(C_OPTS) $(GCC_OPTS) $(CFLAGS) -ALL_CXXFLAGS = $(CXX_OPTS) $(GCC_OPTS) $(CXXFLAGS) +ALL_OBJCFLAGS = $(OBJC_OPTS) $(GCC_OPTS) $(GNUSTEP_OPTS) $(OBJCFLAGS) $(CPPFLAGS) +ALL_CFLAGS = $(C_OPTS) $(GCC_OPTS) $(CFLAGS) $(CPPFLAGS) +ALL_CXXFLAGS = $(CXX_OPTS) $(GCC_OPTS) $(CXXFLAGS) $(CPPFLAGS) # Options for linking Index: unar-1.2/XADMaster/Makefile.linux =================================================================== --- unar-1.2.orig/XADMaster/Makefile.linux 2012-09-13 12:40:06.000000000 +0200 +++ unar-1.2/XADMaster/Makefile.linux 2012-09-13 12:44:03.639747990 +0200 @@ -31,9 +31,9 @@ AUTODEPENDENCY_CFLAGS=-MMD -MF$(@:.o=.d) -MT$@ -ALL_OBJCFLAGS = $(OBJC_OPTS) $(GCC_OPTS) $(GNUSTEP_OPTS) $(OBJCFLAGS) -ALL_CFLAGS = $(C_OPTS) $(GCC_OPTS) $(CFLAGS) -ALL_CXXFLAGS = $(CXX_OPTS) $(GCC_OPTS) $(CXXFLAGS) +ALL_OBJCFLAGS = $(OBJC_OPTS) $(GCC_OPTS) $(GNUSTEP_OPTS) $(OBJCFLAGS) $(CPPFLAGS) +ALL_CFLAGS = $(C_OPTS) $(GCC_OPTS) $(CFLAGS) $(CPPFLAGS) +ALL_CXXFLAGS = $(CXX_OPTS) $(GCC_OPTS) $(CXXFLAGS) $(CPPFLAGS) # Options for linking
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