Bug#672465: shapelib: Hardening flags missing
Simon Ruderich
simon at ruderich.org
Fri May 11 09:32:53 UTC 2012
Package: shapelib
Version: 1.2.10-6
Severity: normal
Tags: patch
Dear Maintainer,
The hardening flags are missing because they are ignored by the
build system. For more hardening information please have a look
at [1], [2] and [3].
The attached patches which are revised versions of existing
patches in debian/rules/patches fix the issue.
CPPFLAGS, CFLAGS and LDFLAGS were missing in a few places. The
flag fixes (CPPFLAGS, CFLAGS for compiler commands; CFLAGS,
LDFLAGS for linker commands) should be sent to upstream if
possible.
To check if all flags were correctly enabled you can use
`hardening-check` from the hardening-includes package and check
the build log (for example with blhc [4]) (hardening-check
doesn't catch everything):
$ hardening-check /usr/bin/shptest /usr/bin/shprewind /usr/bin/shpdump ...
/usr/bin/shptest:
Position Independent Executable: no, normal executable!
Stack protected: no, not found!
Fortify Source functions: yes
Read-only relocations: yes
Immediate binding: no not found!
/usr/bin/shprewind:
Position Independent Executable: no, normal executable!
Stack protected: no, not found!
Fortify Source functions: yes
Read-only relocations: yes
Immediate binding: no not found!
/usr/bin/shpdump:
Position Independent Executable: no, normal executable!
Stack protected: no, not found!
Fortify Source functions: yes
Read-only relocations: yes
Immediate binding: no not found!
...
(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
[4]: http://ruderich.org/simon/blhc/
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