The release files are signed but verifying the signatures cannot
catch certain types of attacks:
1. A malicious maintainer could make more than one variant of
a package. One could be for general distribution. Another
with malicious content could be targeted to specific users,
for example, distributing the malicious version on a mirror
controlled by the attacker.
2. If the signing key of an honest maintainer was compromised
without being detected, a similar situation as described
above could occur.
SHA256SUMS could be put on the project website but having it in
the Git repository makes it obvious that old lines aren't modified
when the file is updated.
Hashes of uncompressed files are included too. This way tarballs
can be recompressed and the hashes can still be verified.
One of the reasons to have this file in the xz repository was to
show vulnerability reporting info in the Security section on GitHub.
On 2024-11-25, I added SECURITY.md to the tukaani-project organization
on GitHub:
https://github.com/tukaani-project/.github/blob/main/SECURITY.md
GitHub shows that file in all projects in the organization unless
overridden by a project-specific SECURITY.md. Thus, removing
the file from the xz repo makes GitHub show the organization-wide
text instead.
Maintaining a single copy for the whole GitHub organization makes
things simpler. It's also nicer to have fewer GitHub-specific files
in the xz repo. Information how to report bugs (including security
issues) is available in README and on the home page too.
The OpenSSF Scorecard tool didn't find .github/SECURITY.md from the
xz repository. There was a suggestion to move the file to the top-level
directory where Scorecard should find it. However, Scorecard does find
the organization-wide SECURITY.md. Thus, the file isn't needed in the
xz repository to score points in the Scorecard game:
https://scorecard.dev/viewer/?uri=github.com/tukaani-project/xz
Closes: https://github.com/tukaani-project/xz/issues/148
Closes: https://github.com/tukaani-project/xz/pull/149
IMPORTANT: This includes a security fix to command line tool
argument handling.
Some toolchains embed an application manifest by default to declare
UAC-compliance. Some also declare compatibility with Vista/8/8.1/10/11
to let the app access features newer than those of Vista.
We want all the above but also two more things:
- Declare that the app is long path aware to support paths longer
than 259 characters (this may also require a registry change).
- Force the code page to UTF-8. This allows the command line tools
to access files whose names contain characters that don't exist
in the current legacy code page (except unpaired surrogates).
The UTF-8 code page also fixes security issues in command line
argument handling which can be exploited with malicious filenames.
See the new file w32_application.manifest.comments.txt.
Thanks to Orange Tsai and splitline from DEVCORE Research Team
for discovering this issue.
Thanks to Vijay Sarvepalli for reporting the issue to me.
Thanks to Kelvin Lee for testing with MSVC and helping with
the required build system fixes.
Now the information in the "Details" tab in the file properties
dialog matches the naming convention of Cygwin and MSYS2. This
is only a cosmetic change.
Autotools-based build has always done this so this is for consistency.
However, the CMake build won't create the DEF file when building
for Cygwin or MSYS2 because in that context it should be useless.
(If Cygwin or MSYS2 is used to host building of normal Windows
binaries then the DEF file is still created.)
The MB output can overflow with huge numbers. Most likely these are
invalid .lzma files anyway, but let's avoid garbage output.
lzmadec was adapted from LZMA Utils. The original code with this bug
was written in 2005, over 19 years ago.
Co-authored-by: Lasse Collin <lasse.collin@tukaani.org>
Closes: https://github.com/tukaani-project/xz/pull/144
"xzdec -M123" exited with exit status 1 without printing
any messages. The "M:" entry should have been removed when
the memory usage limiter support was removed from xzdec.
Fixes: 792331bdee
Closes: https://github.com/tukaani-project/xz/pull/143
[ Lasse: Commit message edits ]
Differences to the zh_CN.po file from the Translation Project:
- Two uses of \v were fixed.
- Missing "OPTS" translation in --riscv[=OPTS] was copied from
previous lines.
- "make update-po" was run to remove line numbers from comments.
Differences to the ca.po file from the Translation Project:
- An overlong line translating --filters-help was wrapped.
- "make update-po" was used to remove line numbers from the comments
to match the changes in fccebe2b4f
and 093490b582. xz.pot in the TP
is older than these commits.
Support for instruction "movzw" without suffix in "GNU as" was
added in commit [1] and stabilized in binutils 2.27, released
in August 2016. Earlier systems don't accept this instruction
without a suffix, making range_decoder.h's inline assembly
unable to build on old systems such as Ubuntu 16.04, creating
error messages like:
lzma_decoder.c: Assembler messages:
lzma_decoder.c:371: Error: no such instruction: `movzw 2(%r11),%esi'
lzma_decoder.c:373: Error: no such instruction: `movzw 4(%r11),%edi'
lzma_decoder.c:388: Error: no such instruction: `movzw 6(%r11),%edx'
lzma_decoder.c:398: Error: no such instruction: `movzw (%r11,%r14,4),%esi'
Change "movzw" to "movzwl" for compatibility.
[1] https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=c07315e0c610e0e3317b4c02266f81793df253d2
Suggested-by: Lasse Collin <lasse.collin@tukaani.org>
Tested-by: Yifeng Li <tomli@tomli.me>
Signed-off-by: Yifeng Li <tomli@tomli.me>
Fixes: 3182a330c1
Fixes: https://github.com/tukaani-project/xz/issues/121
Closes: https://github.com/tukaani-project/xz/pull/136
This reverts commit dc03f6290f.
OpenBSD 7.6 will support elf_aux_info(3), and the detection code used
on FreeBSD will work on OpenBSD 7.6 too. Keep things simpler and drop
the OpenBSD-specific sysctl() method.
Thanks to Christian Weisgerber.
It won't be implemented. find + xargs is more flexible, for example,
it allows compressing small files in parallel. An example for that
has been included in the xz man page since 2010.
The liblzma target was recently changed to link against Threads::Threads
with the PRIVATE keyword. I had forgotten that xz itself depends on
pthreads too due to pthread_sigmask(). Thus, the build broke when
building shared liblzma and pthread_sigmask() wasn't in libc.
Thanks to Peter Seiderer for the bug report.
Fixes: ac05f1b0d7
Fixes: https://github.com/tukaani-project/xz/issues/129#issuecomment-2204522994
While po/*.gmo files won't be used from the release tarball,
the generated translated man pages will be used still. Those
are text files and po4a has slightly more dependencies than
gettext tools so installing po4a might be a bit more challenging
in some situations.
When a release tarball is created using Autotools, the tarball includes
po/*.gmo files which are binary files generated from po/*.po. Other
tarball creation methods don't and won't create the .gmo files.
It feels clearer if CMake will never install pre-generated binary files
from the source package. If people are able to install CMake, they
likely are able to install gettext tools as well (assuming they want
translations).
If a user set XZ_NLS=ON but find_package(Intl) failed or CMake version
wasn't at least 3.20, the configuration would fail in a cryptic way.
If XZ_NLS is enabled, require that CMake is new enough and that either
gettext tools or pre-generated .gmo files are available. Otherwise fail
the configuration. Previously missing gettext tools and .gmo files would
only result in a warning.
Missing man page translations are still only a warning.
Thanks to Peter Seiderer for the bug report.
Fixes: https://github.com/tukaani-project/xz/issues/129
Closes: https://github.com/tukaani-project/xz/pull/130
Lasse Collin
Mark Wielaard
Sam James
Tobias Stoeckmann
Firas Khalil Khana
Yifeng Li