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ClamAV 1.0.0 Release Candidate

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@micahsnyder micahsnyder released this 25 Oct 18:56
· 360 commits to main since this release
clamav-1.0.0-rc
679993a

ClamAV 1.0.0 includes the following improvements and changes.

Major changes

  • Support for decrypting read-only OLE2-based XLS files that are encrypted with
    the default "VelvetSweatshop" password.
    Use of the VelvetSweatshop password will now appear in the metadata JSON.

    • GitHub pull request: #700

  • Overhauled the implementation of the all-match feature. The newer code is more
    reliable and easier to maintain.

    • This project fixed several known issues with signature detection in all-
      match mode:
      • Enabled embedded file-type-recognition-signatures to match when a malware
        signature also matched in a scan of the same layer.
      • Enabled bytecode signatures to run in all-match mode after a match has
        occurred.
      • Fixed an assortment of all-match edge case issues:
    • Added multiple test cases to verify correct all-match behavior.
    • GitHub pull request: #687

  • Added a new callback to the public API for inspecting file content during a
    scan at each layer of archive extraction.

    • The new callback function type is clcb_file_inspection defined in
      clamav.h.
    • The function cl_engine_set_clcb_file_inspection() may be used to enable
      the callback prior to performing a scan.
    • This new callback is to be considered unstable for the 1.0 release.
      We may alter this function in a subsequent feature version.
    • GitHub pull request: #170

  • Added a new function to the public API for unpacking CVD signature archives.

    • The new function is cl_cvdunpack(). The last parameter for the function
      may be set to verify if a CVD's signature is valid before unpacking the CVD
      content to the destination directory.
    • GitHub pull request: #690

Other improvements

  • Add checks to limit PDF object extraction recursion.

    • GitHub pull request: #629

  • Increased the limit for memory allocations based on untrusted input and
    altered the warning message when the limit is exceeded so that it is more
    helpful and less dramatic.

    • GitHub pull request: #723

  • Dramatically improved the build time of libclamav-Rust unit tests.
    The unit test build is included in the time limit for the test itself and was
    timing out on slower systems. The ClamAV Rust code modules now share the same
    build directory, which also reduces the amount of disk space used for the
    build.

    • GitHub pull request: #694

  • Windows: The debugging symbol (PDB) files are now installed alongside the DLL

  • and LIB library files when built in "RelWithDebInfo" or "Debug" mode.

    • GitHub pull request: #669

  • Relaxed the constraints on the check for overlapping ZIP file entries so as
    not to alert on slightly malformed, but non-malicious, Java (JAR) archives.

    • Talos escalations issues:
    • GitHub pull request: #561

  • Increased the time limit in FreshClam before warning if the DNS entry is
    stale. In combination with changes to update the DNS entry more
    frequently, this should prevent false alarms of failures in the database
    publication system.

    • GitHub pull request: #597

  • Docker: The C library header files are now included in the Docker image.
    Patch courtesy of GitHub user TerminalFi.

    • GitHub pull request: #693

  • Show the BYTECODE_RUNTIME build options when using the ccmake GUI for CMake.
    Patch courtesy of Дилян Палаузов.

    • GitHub pull request: #678

  • Added explicit minimum and maximum supported LLVM versions so that the build
    will fail if you try to build with the version that is too old or too new and
    will print a helpful message rather than simply failing to compile because of
    compatibility issues. Patch courtesy of Matt Jolly.

    • GitHub pull request: #692

Bug fixes

  • Assorted code quality fixes. These are not security issues and will not be
    backported to prior feature versions:

    • Several heap buffer overflows while loading PDB and WDB databases were found
      by OSS-Fuzz and by Michał Dardas.

      • GitHub pull request: #530
      • Follow-up Optimization: #712

    • oss-fuzz 43843: heap buffer overflow read (1) cli_sigopts_handler

      • GitHub pull request: #560

    • oss-fuzz 44849: heap buffer overflow read (4) in HTML/js-norm

      • GitHub pull request: #503

    • oss-fuzz 43816: heap buffer overflow read (8) in cli_bcomp_freemeta

      • GitHub pull request: #583

    • oss-fuzz 43832: heap buffer overflow read (2) in cli_parse_add

      • GitHub pull request: #611

    • oss-fuzz 44493: integer overflow in cli_scannulsft

      • GitHub pull request: #554

    • CIFuzz leak detected in IDB parser

      • GitHub pull request: #547

    • oss-fuzz assorted signature parser leaks

    • oss-fuzz 40601: leak detected in pdf_parseobj

      • GitHub pull request: #553

  • Fixed a build failure when using LIBCLAMAV_ONLY mode with tests enabled.

    • GitHub pull request: #714

  • Fixed an issue verifying EXE/DLL authenticode signatures to determine a given
    file can be trusted (skipped).

    • GitHub pull request: #727

  • Fixed a caching bug relating to the Container and Intermediates logical
    signature condition.

    • GitHub pull request: #724

  • Fixed a build issues when build with RAR disabled or when building with an
    external libmspack library rather than the vendored library.

    • GitHub pull request: #672

  • Fixed the capitalization of the -W option for clamonacc in the clamonacc
    manpage. Patch courtesy of GitHub user monkz.

  • macOS: Fixed an issue with memory-map (mmap) system call detection affecting
    versions 0.105 and 0.104. Memory maps may be used in ClamAV to improve
    signature load performance, scan performance, and RAM usage.

    • GitHub pull request: #705

  • Fixed a performance issue with Rust code when the build type is not explicitly
    set to "Release" or "RelWithDebInfo". The Rust default build type is now
    "RelWithDebInfo" just like the C code, instead of Debug.
    This means it is now optimized by default.

    • GitHub pull request: #701

  • Fixed an issue loading Yara rules containing regex strings with an escaped
    forward-slash (\/) followed by a colon (:).

    • GitHub pull request: #696

  • Fixed an issue detecting and scanning ZIP file entries appended to very small
    files. The fix is part of the all-match feature overhaul.

  • Fixed a detection issue with EXE/DLL import-address-table hash signatures that
    specify a wildcard (*) for the size field. The fix is part of the all-match
    feature overhaul.

  • Fix the default bytecode timeout value listed in the manpages and in the
    sample config files. Patches courtesy of Liam Jarvis and Ben Bodenmiller.

  • Fix issue building the libclamav_rust test program when running ctest if
    building with BYTECODE_RUNTIME=llvm and when the FindLLVM.cmake module is
    used to find the LLVM libraries. Patch courtesy of GitHub user teoberi.

    • GitHub pull request: #572

Acknowledgments

Special thanks to the following people for code contributions and bug reports:

  • Ben Bodenmiller
  • Дилян Палаузов
  • Liam Jarvis
  • Matt Jolly
  • monkz
  • teoberi
  • TerminalFi
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