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Releases: Cisco-Talos/clamav

ClamAV 1.4.0-rc

07 May 17:44
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ClamAV 1.4.0-rc Pre-release
Pre-release

ClamAV 1.4.0 Release Candidate includes the following improvements and changes:

Major changes

  • Added support for extracting ALZ archives.
    The new ClamAV file type for ALZ archives is CL_TYPE_ALZ.
    Added a DCONF option to enable or disable ALZ archive support.

    Tip: DCONF (Dynamic CONFiguration) is a feature that allows for some configuration changes to be made via ClamAV .cfg "signatures".

  • Added support for extracting LHA/LZH archives.
    The new ClamAV file type for ALZ archives is CL_TYPE_LHA_LZH.
    Added a DCONF option to enable or disable LHA/LZH archive support.

  • Added the ability to disable image fuzzy hashing, if needed. For context, image fuzzy hashing is a detection mechanism useful for identifying malware by matching images included with the malware or phishing email/document.

    New ClamScan options:

    --scan-image[=yes(*)/no]
    --scan-image-fuzzy-hash[=yes(*)/no]
    

    New ClamD config options:

    ScanImage yes(*)/no
    ScanImageFuzzyHash yes(*)/no
    

    New libclamav scan options:

    options.parse &= ~CL_SCAN_PARSE_IMAGE;
    options.parse &= ~CL_SCAN_PARSE_IMAGE_FUZZY_HASH;

    Added a DCONF option to enable or disable image fuzzy hashing support.

Other improvements

  • Added cross-compiling instructions for targeting ARM64/aarch64 processors for Windows and Linux.

  • Improved the Freshclam warning messages when being blocked or rate limited so as to include the Cloudflare Ray ID, which helps with issue triage.

  • Removed unnecessary memory allocation checks when the size to be allocated is fixed or comes from a trusted source.
    We also renamed internal memory allocation functions and macros, so it is more obvious what each function does.

  • Improved the Freshclam documentation to make it clear that the --datadir option must be an absolute path to a directory that already exists, is writable by Freshclam, and is readable by ClamScan and ClamD.

  • Added an optimization to avoid calculating the file hash if the clean file cache has been disabled. The file hash may still be calculated as needed to perform hash-based signature matching if any hash-based signatures exist that target a file of the same size, or if any hash-based signatures exist that target "any" file size.

  • Added an improvement to the SystemD service file for ClamOnAcc so that the service will shut down faster on some systems.

Bug fixes

  • Silenced confusing warning message when scanning some HTML files.

  • Fixed minor compiler warnings.

  • Since the build system changed from Autotools to CMake, ClamAV no longer supports building with configurations where bzip2, libxml2, libz, libjson-c, or libpcre2 are not available. Libpcre is no longer supported in favor of libpcre2. In this release, we removed all the dead code associated with those unsupported build configurations.

  • Fixed assorted typos. Patch courtesy of RainRat.

  • Added missing documentation for the ClamScan --force-to-disk option.

  • Fixed an issue where ClamAV unit tests would prefer an older libclamunrar_iface library from the install path, if present, rather than
    the recently compiled library in the build path.

Acknowledgments

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

  • RainRat

ClamAV 1.3.1

17 Apr 17:25
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ClamAV 1.3.1 is a critical patch release with the following fixes:

  • CVE-2024-20380:
    Fixed a possible crash in the HTML file parser that could cause a
    denial-of-service (DoS) condition.

    This issue affects version 1.3.0 only and does not affect prior versions.

    Thank you to Błażej Pawłowski for identifying this issue.

  • Updated select Rust dependencies to the latest versions.
    This resolved Cargo audit complaints and included PNG parser bug fixes.

  • Fixed a bug causing some text to be truncated when converting from UTF-16.

  • Fixed assorted complaints identified by Coverity static analysis.

  • Fixed a bug causing CVDs downloaded by the DatabaseCustomURL Freshclam
    config option to be pruned and then re-downloaded with every update.

  • Added the new 'valhalla' database name to the list of optional databases in
    preparation for future work.

  • Added symbols to the libclamav.map file to enable additional build
    configurations.

    Patch courtesy of Neil Wilson.

ClamAV 1.2.3

17 Apr 17:24
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ClamAV 1.2.3 is a critical patch release with the following fixes:

  • Updated select Rust dependencies to the latest versions.
    This resolved Cargo audit complaints and included PNG parser bug fixes.

  • Fixed a bug causing some text to be truncated when converting from UTF-16.

  • Fixed assorted complaints identified by Coverity static analysis.

  • Fixed a bug causing CVDs downloaded by the DatabaseCustomURL Freshclam
    config option to be pruned and then re-downloaded with every update.

  • Added the new 'valhalla' database name to the list of optional databases in
    preparation for future work.

  • Silenced a warning "Unexpected early end-of-file" that occured when
    scanning some PNG files.

ClamAV 1.0.6

17 Apr 17:24
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ClamAV 1.0.6 is a critical patch release with the following fixes:

  • Updated select Rust dependencies to the latest versions.
    This resolved Cargo audit complaints and included PNG parser bug fixes.

  • Fixed a bug causing some text to be truncated when converting from UTF-16.

  • Fixed assorted complaints identified by Coverity static analysis.

  • Fixed a bug causing CVDs downloaded by the DatabaseCustomURL Freshclam
    config option to be pruned and then re-downloaded with every update.

  • Added the new 'valhalla' database name to the list of optional databases in
    preparation for future work.

  • Silenced a warning "Unexpected early end-of-file" that occured when
    scanning some PNG files.

ClamAV 1.3.0

07 Feb 16:06
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ClamAV 1.3.0 includes the following improvements and changes:

Major changes

  • Added support for extracting and scanning attachments found in Microsoft
    OneNote section files.
    OneNote parsing will be enabled by default, but may be optionally disabled
    using one of the following options:
    a. The clamscan command line option: --scan-onenote=no,
    b. The clamd.conf config option: ScanOneNote no,
    c. The libclamav scan option options.parse &= ~CL_SCAN_PARSE_ONENOTE;,
    d. A signature change to the daily.cfg dynamic configuration (DCONF).

Other improvements

  • Fixed issue when building ClamAV on the Haiku (BeOS-like) operating system.
    Patch courtesy of Luca D'Amico

  • ClamD: When starting, ClamD will now check if the directory specified by
    TemporaryDirectory in clamd.conf exists. If it doesn't, ClamD
    will print an error message and will exit with exit code 1.
    Patch courtesy of Andrew Kiggins.

  • CMake: If configured to build static libraries, CMake will now also
    install the libclamav_rust, libclammspack, libclamunrar_iface, and
    libclamunrar static libraries required by libclamav.

    Note: These libraries are all linked into the clamscan, clamd, sigtool,
    and freshclam programs, which is why they did not need to be installed
    to function. However, these libraries would be required if you wish to
    build some other program that uses the libclamav static library.

    Patch courtesy of driverxdw.

  • Added file type recognition for compiled Python (.pyc) files.
    The file type appears as a string parameter for these callback functions:

    • clcb_pre_cache
    • clcb_pre_scan
    • clcb_file_inspection
      When scanning a .pyc file, the type parameter will now show
      "CL_TYPE_PYTHON_COMPILED" instead of "CL_TYPE_BINARY_DATA".
    • GitHub pull request
  • Improved support for decrypting PDF's with empty passwords.

  • Assorted minor improvements and typo fixes.

Bug fixes

  • Fixed a warning when scanning some HTML files.

  • Fixed an issue decrypting some PDF's with an empty password.

  • ClamOnAcc: Fixed an infinite loop when a watched directory does not exist.

  • ClamOnAcc: Fixed an infinite loop when a file has been deleted before a scan.
    Patch courtesy of gsuehiro.

  • Fixed a possible crash when processing VBA files on HP-UX/IA 64bit.
    Patch courtesy of Albert Chin-A-Young.

  • ClamConf: Fixed an issue printing MaxScanSize introduced with the change
    to allow a MaxScanSize greater than 4 GiB.
    Fix courtesy of teoberi.

  • Fixed an issue building a ClamAV RPM in some configurations.
    The issue was caused by faulty CMake logic that intended to create an
    empty database directory during the install.

Acknowledgments

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

  • Albert Chin-A-Young
  • Andrew Kiggins
  • driverxdw
  • gsuehiro
  • Luca D'Amico
  • RainRat
  • teoberi

ClamAV 1.2.2

07 Feb 16:06
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ClamAV 1.2.2 is a critical patch release with the following fix:

  • CVE-2024-20290:
    Fixed a possible heap overflow read bug in the OLE2 file parser that could
    cause a denial-of-service (DoS) condition.

    Affected versions:

    • 1.0.0 through 1.0.4 (LTS)
    • 1.1 (all patch versions)
    • 1.2.0 and 1.2.1

    Thank you to OSS-Fuzz for identifying this issue.

  • CVE-2024-20328:
    Fixed a possible command injection vulnerability in the VirusEvent feature
    of ClamAV's ClamD service.

    To fix this issue, we disabled the '%f' format string parameter.
    ClamD administrators may continue to use the CLAM_VIRUSEVENT_FILENAME
    environment variable, instead of '%f'. But you should do so only from within
    an executable, such as a Python script, and not directly in the clamd.conf
    VirusEvent command.

    Affected versions:

    • 0.104 (all patch versions)
    • 0.105 (all patch versions)
    • 1.0.0 through 1.0.4 (LTS)
    • 1.1 (all patch versions)
    • 1.2.0 and 1.2.1

    Thank you to Amit Schendel for identifying this issue.

ClamAV 1.0.5

07 Feb 16:06
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ClamAV 1.0.5 is a critical patch release with the following fixes:

  • CVE-2024-20290:
    Fixed a possible heap overflow read bug in the OLE2 file parser that could
    cause a denial-of-service (DoS) condition.

    Affected versions:

    • 1.0.0 through 1.0.4 (LTS)
    • 1.1 (all patch versions)
    • 1.2.0 and 1.2.1

    Thank you to OSS-Fuzz for identifying this issue.

  • CVE-2024-20328:
    Fixed a possible command injection vulnerability in the VirusEvent feature
    of ClamAV's ClamD service.

    To fix this issue, we disabled the '%f' format string parameter.
    ClamD administrators may continue to use the CLAM_VIRUSEVENT_FILENAME
    environment variable, instead of '%f'. But you should do so only from within
    an executable, such as a Python script, and not directly in the clamd.conf
    VirusEvent command.

    Affected versions:

    • 0.104 (all patch versions)
    • 0.105 (all patch versions)
    • 1.0.0 through 1.0.4 (LTS)
    • 1.1 (all patch versions)
    • 1.2.0 and 1.2.1

    Thank you to Amit Schendel for identifying this issue.

ClamAV 1.3.0-rc2

24 Jan 20:29
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ClamAV 1.3.0-rc2 Pre-release
Pre-release

ClamAV 1.3.0 includes the following improvements and changes:

Major changes

  • Added support for extracting and scanning attachments found in Microsoft
    OneNote section files.
    OneNote parsing will be enabled by default, but may be optionally disabled
    using one of the following options:
    a. The clamscan command line option: --scan-onenote=no,
    b. The clamd.conf config option: ScanOneNote no,
    c. The libclamav scan option options.parse &= ~CL_SCAN_PARSE_ONENOTE;,
    d. A signature change to the daily.cfg dynamic configuration (DCONF).

Other improvements

  • Fixed issue when building ClamAV on the Haiku (BeOS-like) operating system.
    Patch courtesy of Luca D'Amico

  • ClamD: When starting, ClamD will now check if the directory specified by
    TemporaryDirectory in clamd.conf exists. If it doesn't, ClamD
    will print an error message and will exit with exit code 1.
    Patch courtesy of Andrew Kiggins.

  • CMake: If configured to build static libraries, CMake will now also
    install the libclamav_rust, libclammspack, libclamunrar_iface, and
    libclamunrar static libraries required by libclamav.

    Note: These libraries are all linked into the clamscan, clamd, sigtool,
    and freshclam programs, which is why they did not need to be installed
    to function. However, these libraries would be required if you wish to
    build some other program that uses the libclamav static library.

    Patch courtesy of driverxdw.

  • Added file type recognition for compiled Python (.pyc) files.
    The file type appears as a string parameter for these callback functions:

    • clcb_pre_cache
    • clcb_pre_scan
    • clcb_file_inspection
      When scanning a .pyc file, the type parameter will now show
      "CL_TYPE_PYTHON_COMPILED" instead of "CL_TYPE_BINARY_DATA".
    • GitHub pull request
  • Improved support for decrypting PDF's with empty passwords.

  • Assorted minor improvements and typo fixes.

Bug fixes

  • Fixed a warning when scanning some HTML files.

  • Fixed an issue decrypting some PDF's with an empty password.

  • ClamOnAcc: Fixed an infinite loop when a watched directory does not exist.

  • ClamOnAcc: Fixed an infinite loop when a file has been deleted before a scan.
    Patch courtesy of gsuehiro.

  • Fixed a possible crash when processing VBA files on HP-UX/IA 64bit.
    Patch courtesy of Albert Chin-A-Young.

  • ClamConf: Fixed an issue printing MaxScanSize introduced with the change
    to allow a MaxScanSize greater than 4 GiB.
    Fix courtesy of teoberi.

  • Fixed an issue building a ClamAV RPM in some configurations.
    The issue was caused by faulty CMake logic that intended to create an
    empty database directory during the install.

Acknowledgments

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

  • Albert Chin-A-Young
  • Andrew Kiggins
  • driverxdw
  • gsuehiro
  • Luca D'Amico
  • RainRat
  • teoberi

ClamAV 1.3.0-rc

15 Dec 16:07
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ClamAV 1.3.0-rc Pre-release
Pre-release

ClamAV 1.3.0 release candidate includes the following improvements and changes:

Major changes

  • Added support for extracting and scanning attachments found in Microsoft
    OneNote section files.
    OneNote parsing will be enabled by default, but may be optionally disabled
    using one of the following options:
    a. The clamscan command line option: --scan-onenote=no,
    b. The clamd.conf config option: ScanOneNote no,
    c. The libclamav scan option options.parse &= ~CL_SCAN_PARSE_ONENOTE;,
    d. A signature change to the daily.cfg dynamic configuration (DCONF).

Other improvements

  • Fixed issue when building ClamAV on the Haiku (BeOS-like) operating system.
    Patch courtesy of Luca D'Amico

  • ClamD: When starting, ClamD will now check if the directory specified by
    TemporaryDirectory in clamd.conf exists. If it doesn't, ClamD
    will print an error message and will exit with exit code 1.
    Patch courtesy of Andrew Kiggins.

  • CMake: If configured to build static libraries, CMake will now also
    install the libclamav_rust, libclammspack, libclamunrar_iface, and
    libclamunrar static libraries required by libclamav.

    Note: These libraries are all linked into the clamscan, clamd, sigtool,
    and freshclam programs, which is why they did not need to be installed
    to function. However, these libraries would be required if you wish to
    build some other program that uses the libclamav static library.

    Patch courtesy of driverxdw.

  • Added file type recognition for compiled Python (.pyc) files.
    The file type appears as a string parameter for these callback functions:

    • clcb_pre_cache
    • clcb_pre_scan
    • clcb_file_inspection
      When scanning a .pyc file, the type parameter will now show
      "CL_TYPE_PYTHON_COMPILED" instead of "CL_TYPE_BINARY_DATA".
    • GitHub pull request
  • Assorted minor improvements and typo fixes.

Bug fixes

Acknowledgments

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

  • Albert Chin-A-Young
  • Andrew Kiggins
  • driverxdw
  • Luca D'Amico
  • RainRat

ClamAV 1.2.1

25 Oct 17:13
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ClamAV 1.2.1 is a patch release with the following fixes:

  • Eliminate security warning about unused "atty" dependency.

    • GitHub pull request: #1033
  • Upgrade the bundled UnRAR library (libclamunrar) to version 6.2.12.

    • GitHub pull request: #1056
  • Build system: Fix link error with Clang/LLVM/LLD version 17.
    Patch courtesy of Yasuhiro Kimura.

    • GitHub pull request: #1060
  • Fix alert-exceeds-max feature for files > 2GB and < max-filesize.

    • GitHub pull request: #1039

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

  • Yasuhiro Kimura