Package: dash
Version: 0.5.7-3
Severity: important
Tags: patch
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
Dear Maintainer,
Please consider enabling hardening flags which are a release goal
for wheezy. For more information please have a look at [1], [2]
and [3].
The attached patch enables the hardening flags and fixes a format
string vulnerability detected by -Wformat-security. -g and -O2 is
automatically set by dpkg-buildflags (noopt is respected). I've
been using the patched version for some time now and it works
fine for me.
To check if all flags were correctly enabled you can use
`hardening-check` from the hardening-includes package:
$ hardening-check /bin/dash
/bin/dash:
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!
(Position Independent Executable and Immediate binding is not
enabled by default.)
Regards,
Simon
[1]: https://wiki.debian.org/ReleaseGoals/SecurityHardeningBuildFlags
[2]: https://wiki.debian.org/HardeningWalkthrough
[3]: https://wiki.debian.org/Hardening
- -- System Information:
Debian Release: wheezy/sid
APT prefers unstable
APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)
Kernel: Linux 3.2.0-1-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages dash depends on:
ii debianutils 4.2.1
ii dpkg 1.16.1.2
ii libc6 2.13-27
dash recommends no packages.
dash suggests no packages.
- -- debconf information excluded
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diff -u dash-0.5.7/debian/control dash-0.5.7/debian/control
--- dash-0.5.7/debian/control
+++ dash-0.5.7/debian/control
@@ -2,7 +2,7 @@
Section: shells
Priority: optional
Maintainer: Gerrit Pape <p...@smarden.org>
-Build-Depends: po-debconf
+Build-Depends: po-debconf, dpkg-dev (>= 1.16.1)
Standards-Version: 3.9.3.0
Homepage: http://gondor.apana.org.au/~herbert/dash/
Vcs-Git: http://smarden.org/git/dash.git/
diff -u dash-0.5.7/debian/rules dash-0.5.7/debian/rules
--- dash-0.5.7/debian/rules
+++ dash-0.5.7/debian/rules
@@ -1,7 +1,10 @@
#!/usr/bin/make -f
+DPKG_EXPORT_BUILDFLAGS = 1
+include /usr/share/dpkg/buildflags.mk
+
CC =gcc
-CFLAGS =-g -O2 -Wall
+CFLAGS +=-Wall
STRIP =strip
DEB_HOST_GNU_TYPE =$(shell dpkg-architecture -qDEB_HOST_GNU_TYPE)
only in patch2:
unchanged:
--- dash-0.5.7.orig/src/jobs.c
+++ dash-0.5.7/src/jobs.c
@@ -427,7 +427,7 @@
goto out;
#endif
}
- col = fmtstr(s, 32, strsignal(st));
+ col = fmtstr(s, 32, "%s", strsignal(st));
#ifdef WCOREDUMP
if (WCOREDUMP(status)) {
col += fmtstr(s + col, 16, " (core dumped)");
