This addresses the following security advisories:
+ CVE-2016-3075: Stack overflow in _nss_dns_getnetbyname_r
+ CVE-2016-1234: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
NAME_MAX limit assumption
+ CVE-2016-3706: getaddrinfo: stack overflow in hostent conversion
Patches cherry-picked from glibc's release/2.23/master branch.
The "glob-simplify-interface.patch" was a dependency for
"cve-2016-1234.patch".
The following parameters are now available:
* hardeningDisable
To disable specific hardening flags
* hardeningEnable
To enable specific hardening flags
Only the cc-wrapper supports this right now, but these may be reused by
other wrappers, builders or setup hooks.
cc-wrapper supports the following flags:
* fortify
* stackprotector
* pie (disabled by default)
* pic
* strictoverflow
* format
* relro
* bindnow
The importance of glibc makes it worthwhile to provide debug
symbols. However, this revealed an issue with separateDebugInfo: it
was indiscriminately adding --build-id to all ld invocations, while in
fact it should only do that for final links. Glibc also uses non-final
("relocatable") links, leading to subsequent failure to apply a build
ID ("Cannot create .note.gnu.build-id section, --build-id
ignored"). So now ld-wrapper.sh only passes --build-id for final
links.
The glibc DNS client side resolver is vulnerable to a stack-based buffer
overflow when the getaddrinfo() library function is used. Software using
this function may be exploited with attacker-controlled domain names,
attacker-controlled DNS servers, or through a man-in-the-middle attack.
https://googleonlinesecurity.blogspot.co.uk/2016/02/cve-2015-7547-glibc-getaddrinfo-stack.html
The most complex problems were from dealing with switches reverted in
the meantime (gcc5, gmp6, ncurses6).
It's likely that darwin is (still) broken nontrivially.
Fixes CVE-2014-8121, CVE-2015-1781 and two unnumbered problems (apparently).
All these commits should be contained in the 2.22 release,
but we don't want that yet due to unresolved locale incompatibilites.
Until now, if e.g. the user passed "en_US.UTF-8" instead of "en_US.UTF-8/UTF-8",
the locales would be generated without failing but wouldn't work well.
Now we guard against such mistakes. Real life examples:
https://github.com/fish-shell/fish-shell/issues/1927
It used to be a symlink, but now it is a link script. It's crucial to get
proper linking, specially on amrv5tel, where libgcc contains lot of code
related to the limited instruction set of the platform.
Without this fix, g++ shared lib linking was broken, because a "-lgcc" was
not propagated wherever "-lgcc_s" was required. The g++ spec only mentions
"-lgcc_s" and the "-lgcc" is introduced with the libgcc_s.so link script,
only available in the glibc path after this fix.
As a reminder, we put libgcc* in the glibc output to avoid having a
runtime dependency on the gcc path only because of the everywhere linked
libgcc. This problem was specially visible in platforms like armv5tel,
where most programs end up linked to libgcc. Platforms with a more rich
instruction set may rarely end up requiring a link to libgcc.
Now development stuff is propagated from the first output,
and userEnvPkgs from the one with binaries.
Also don't move *.la files (yet). It causes problems, and they're small.
