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Security: Updates, Reproducible Builds, and More

Submitted by Roy Schestowitz on Friday 17th of September 2021 07:11:33 PM Filed under
Security
  • Security updates for Friday

    Security updates have been issued by CentOS (firefox and thunderbird), Fedora (haproxy, wordpress, and xen), openSUSE (apache2-mod_auth_openidc, fail2ban, ghostscript, haserl, libcroco, nextcloud, and wireshark), Oracle (kernel and kernel-container), Slackware (httpd), SUSE (crmsh, gtk-vnc, libcroco, Mesa, postgresql12, postgresql13, and transfig), and Ubuntu (libgcrypt20, linux-gcp, linux-gcp-4.15, linux-hwe-5.4, linux-oem-5.13, python3.4, python3.5, and qtbase-opensource-src).

  • Reproducible Builds (diffoscope): diffoscope 184 released

    The diffoscope maintainers are pleased to announce the release of diffoscope version 184. This version includes the following changes:

    [ Chris Lamb ]
* Fix the semantic comparison of R's .rdb files after a refactoring of
  temporary directory handling in a previous version.
* Support a newer format version of R's .rds files.
* Update tests for OCaml 4.12. (Closes: reproducible-builds/diffoscope#274)
* Move diffoscope.versions to diffoscope.tests.utils.versions.
* Use assert_diff in tests/comparators/test_rdata.py.
* Reformat various modules with Black.

[ Zbigniew Jędrzejewski-Szmek ]
* Stop using the deprecated distutils module by adding a version
  comparison class based on the RPM version rules.
* Update invocations of llvm-objdump for the latest version of LLVM.
* Adjust a test with one-byte text file for file(1) version 5.40.
* Improve the parsing of the version of OpenSSH.

[ Benjamin Peterson ]
* Add a --diff-context option to control the unified diff context size.
  (reproducible-builds/diffoscope!88)
  • This Week In Security: Office 0-day, ForcedEntry, ProtonMail, And OMIGOD | Hackaday

    A particularly nasty 0-day was discovered in the wild, CVE-2021-40444, a flaw in how Microsoft’s MSHTML engine handled Office documents. Not all of the details are clear yet, but the result is that opening a office document can trigger a remote code execution. It gets worse, though, because the exploit can work when simply previewing a file in Explorer, making this a potential 0-click exploit. So far the attack has been used against specific targets, but a POC has been published.

    It appears that there are multiple tricks that should be discrete CVEs behind the exploit. First, a simple invocation of mshtml:http in an Office document triggers the download and processing of that URL via the Trident engine, AKA our old friend IE. The real juicy problem is that in Trident, an iframe can be constructed with a .cpl URI pointing at an inf or dll file, and that gets executed without any prompt. This is demonstrated here by [Will Dormann]. A patch was included with this month’s roundup of fixes for Patch Tuesday, so make sure to update.

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