ClamAV - Documentation is here: https://docs.clamav.net
ClamAV 1.4.0 Release Candidate includes the following improvements and 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.
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.
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.
Special thanks to the following people for code contributions and bug reports:
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 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 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 includes the following improvements and changes:
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).
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".Improved support for decrypting PDF's with empty passwords.
Assorted minor improvements and typo 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.
Special thanks to the following people for code contributions and bug reports:
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:
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:
Thank you to Amit Schendel for identifying this issue.
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:
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:
Thank you to Amit Schendel for identifying this issue.
ClamAV 1.3.0 includes the following improvements and changes:
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).
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".Improved support for decrypting PDF's with empty passwords.
Assorted minor improvements and typo 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.
Special thanks to the following people for code contributions and bug reports:
ClamAV 1.3.0 release candidate includes the following improvements and changes:
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).
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".Assorted minor improvements and typo 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.
Fixed a possible crash when processing VBA files on HP-UX/IA 64bit. Patch courtesy of Albert Chin-A-Young.
Special thanks to the following people for code contributions and bug reports:
ClamAV 1.2.1 is a patch release with the following fixes:
Eliminate security warning about unused "atty" dependency.
Upgrade the bundled UnRAR library (libclamunrar) to version 6.2.12.
Build system: Fix link error with Clang/LLVM/LLD version 17. Patch courtesy of Yasuhiro Kimura.
Fix alert-exceeds-max feature for files > 2GB and < max-filesize.
Special thanks to the following people for code contributions and bug reports: