For details see:
https://blog.clamav.net/2023/10/clamav-121-113-104-010311-patch.html
Excerpt:
"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."
Signed-off-by: Matthias Fischer <matthias.fischer@ipfire.org>
Reviewed-by: Adolf Belka <adolf.belka@ipfire.org>
For details see:
https://blog.clamav.net/2023/05/clamav-110-released.html
"Major changes
Added the ability to extract images embedded in HTML CSS <style> blocks.
Updated to Sigtool so that the --vba option will extract VBA code from
Microsoft Office documents the same way that libclamav extracts VBA.
This resolves several issues where Sigtool could not extract VBA.
Sigtool will also now display the normalized VBA code instead of the
pre-normalized VBA code.
Added a new ClamScan and ClamD option: --fail-if-cvd-older-than=days.
Additionally, we introduce FailIfCvdOlderThan as a clamd.conf synonym
for --fail-if-cvd-older-than. When passed, it causes ClamD to exit on
startup with a non-zero return code if the virus database is older than
the specified number of days.
Added a new function cl_cvdgetage() to the libclamav API. This function
will retrieve the age in seconds of the youngest file in a database
directory, or the age of a single CVD (or CLD) file.
Added a new function cl_engine_set_clcb_vba() to the libclamav API. Use
this function to set a cb_vba callback function. The cb_vba callback
function will be run whenever VBA is extracted from office documents.
The provided data will be a normalized copy of the extracted VBA. This
callback was added to support Sigtool so that it can use the same VBA
extraction logic that ClamAV uses to scan documents.
Other improvements
Removed the vendored TomsFastMath library in favor of using OpenSSL to
perform "big number"/multiprecision math operations. Work courtesy of
Sebastian Andrzej Siewior.
Build system: Added CMake option DO_NOT_SET_RPATH to avoid setting
RPATH on Unix systems. Feature courtesy of Sebastian Andrzej Siewior.
Build system: Enabled version-scripts with CMake to limit symbol
exports for libclamav, libfreshclam, libclamunrar_iface, and
libclamunrar shared libraries on Unix systems, excluding macOS.
Improvement courtesy of Orion Poplawski and Sebastian Andrzej Siewior.
Build system: Enabled users to pass in custom Rust compiler flags using
the RUSTFLAGS CMake variable. Feature courtesy of Orion Poplawski.
Removed a hard-coded alert for CVE-2004-0597. The CVE is old enough
that it is no longer a threat and the detection had occasional
false-positives.
Set Git attributes to prevent Git from altering line endings for Rust
vendored libraries. Third-party Rust libraries are bundled in the
ClamAV release tarball. We do not commit them to our own Git
repository, but community package maintainers may now store the tarball
contents in Git. The Rust build system verifies the library manifest,
and this change ensures that the hashes are correct. Improvement
courtesy of Nicolas R.
Fixed compile time warnings. Improvement courtesy of Razvan Cojocaru.
Added a minor optimization when matching domain name regex signatures
for PDB, WDB and CDB type signatures.
Build system: Enabled the ability to select a specific Python version.
When building, you may use the CMake option -D
PYTHON_FIND_VER=<version> to choose a specific Python version. Feature
courtesy of Matt Jolly.
Added improvements to the ClamOnAcc process log output so that it is
easier to diagnose bugs.
Windows: Enabled the MSI installer to upgrade between feature versions
more easily when ClamAV is installed to a location different from the
default (i.e., not C:\Program Files\ClamAV). This means that the MSI
installer can find a previous ClamAV 1.0.x installation to upgrade to
ClamAV 1.1.0.
Sigtool: Added the ability to change the location of the temp directory
using the --tempdir option and added the ability to retain the temp
files created by Sigtool using the --leave-temps option.
Other minor improvements.
Bug fixes
Fixed the broken ExcludePUA / --exclude-pua feature. Fix courtesy of
Ged Haywood and Shawn Iverson.
Fixed an issue with integer endianness when parsing Windows executables
on big-endian systems. Fix courtesy of Sebastian Andrzej Siewior.
Fixed a possible stack overflow read when parsing WDB signatures. This
issue is not a vulnerability.
Fixed a possible index out of bounds when loading CRB signatures. This
issue is not a vulnerability.
Fixed a possible use after free when reading logical signatures. This
issue is not a vulnerability.
Fixed a possible heap overflow read when reading PDB signatures. This
issue is not a vulnerability.
Fixed a possible heap overflow read in javascript normalizer module.
This issue is not a vulnerability.
Fixed two bugs that would cause Freshclam to fail update when applying
a CDIFF database patch if that patch adds a file to the database
archive or removes a file from the database archive. This bug also
caused Sigtool to fail to create such a patch.
Fixed an assortment of complaints identified by Coverity static analysis.
Fixed one of the Freshclam tests that was failing on some Fedora
systems due to a bug printing debug-level log messages to stdout. Fix
courtesy of Arjen de Korte.
Correctly remove temporary files generated by the VBA and XLM
extraction modules so that the files are not leaked in patched versions
of ClamAV where temporary files are written directly to the
temp-directory instead of writing to a unique subdirectory."
Signed-off-by: Matthias Fischer <matthias.fischer@ipfire.org>
Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>
[Please note: This 'clamav' version needs rust >1.56]
For details see:
https://blog.clamav.net/2022/11/clamav-100-lts-released.html
Excerpt:
"Major changes
Support for decrypting read-only OLE2-based XLS files that are encrypted with the default password. Use of
the default password will now appear in the metadata JSON.
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.
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.
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.
The option to build with an external TomsFastMath library has been removed. ClamAV requires non-default
build options for TomsFastMath to support bigger floating point numbers. Without this change, database and
Windows EXE/DLL authenticode certificate validation may fail. The ENABLE_EXTERNAL_TOMSFASTMATH build is now
ignored.
Moved the Dockerfile and supporting scripts from the main ClamAV repository over to a new
repository: https://github.com/Cisco-Talos/clamav-docker
The separate repository will make it easier to update the images and fix issues with images for released
ClamAV versions.
Any users building the ClamAV Docker image rather than pulling them from Docker Hub will have to get the
latest Docker files from the new location.
Increased the SONAME major version for libclamav because of ABI changes between the 0.103 LTS release and
the 1.0 LTS release.
Other improvements
Add checks to limit PDF object extraction recursion.
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.
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.
For Windows: The debugging symbol (PDB) files are now installed alongside the DLL and LIB library files when
built in "RelWithDebInfo" or "Debug" mode.
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.
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.
Docker: The C library header files are now included in the Docker image. Patch courtesy of GitHub user
TerminalFi.
Show the BYTECODE_RUNTIME build options when using the ccmake GUI for CMake. Patch courtesy of
Дилян Палаузов.
Added explicit minimum and maximum supported LLVM versions so that the build will fail if you try to build
with a 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.
Fixed compiler warnings that may turn into errors in Clang 16. Patch courtesy of Michael Orlitzky.
Allow building with a custom RPATH so that the executables may be moved after build in a development
environment to a final installation directory.
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 Michal
Dardas.
oss-fuzz 43843: heap buffer overflow read (1) cli_sigopts_handler
oss-fuzz 44849: heap buffer overflow read (4) in HTML/js-norm
oss-fuzz 43816: heap buffer overflow read (8) in cli_bcomp_freemeta
oss-fuzz 43832: heap buffer overflow read (2) in cli_parse_add
oss-fuzz 44493: integer overflow in cli_scannulsft
CIFuzz leak detected in IDB parser
oss-fuzz assorted signature parser leaks
oss-fuzz 40601: leak detected in pdf_parseobj
Fixed a build failure when using LIBCLAMAV_ONLY mode with tests enabled.
Fixed an issue verifying EXE/DLL authenticode signatures to determine a given file can be trusted (skipped).
Fixed a caching bug relating to the Container and Intermediates logical signature condition.
Fixed a build issue when build with RAR disabled or when building with an external libmspack library rather
than the bundled library.
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 and scan performance, as well as RAM
usage.
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.
Fixed an issue loading Yara rules containing regex strings with an escaped forward-slash (\/) followed by a
colon (:).
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.
Fixed the default bytecode timeout value listed in the manpages and in the sample config files. Patches
courtesy of Liam Jarvis and Ben Bodenmiller.
Fixed an 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.
Fixed an issue where scans sent to clamd with the all-match mode enabled caused all subsequent scans to also
use all-match mode.
Fixed bug when starting clamonacc with the --log=FILE option that created randomly named files in the
current directory.
Other assorted bug fixes."
Signed-off-by: Matthias Fischer <matthias.fischer@ipfire.org>
For details see:
https://blog.clamav.net/2022/07/clamav-01037-01041-and-01051-patch.html
"ClamAV 0.105.1 is a critical patch release with the following fixes:
Upgrade the vendored UnRAR library to version 6.1.7.
Fix issue building macOS universal binaries in some configurations.
Silence error message when the logical signature maximum functionality
level is lower than the current functionality level.
Fix scan error when scanning files containing malformed images that
cannot be loaded to calculate an image fuzzy hash.
Fix logical signature "Intermediates" feature.
Relax constraints on slightly malformed ZIP archives that contain
overlapping file entries."
Signed-off-by: Matthias Fischer <matthias.fischer@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
For details see:
https://blog.clamav.net/2021/09/clamav-01040-released.html
New requirements and major changes:
"As of ClamAV 0.104, CMake is required to build ClamAV
...
The built-in LLVM for the bytecode runtime has been removed."
But since the current 'llvm 12.0.1' version refused to be build
"...you will need to supply the development libraries for LLVM
version 3.6.2" - which is ~6 years old - I gave up with 'llvm'
and stayed with the bytecode "interpreter".
Cited:
"The bytecode interpreter is the default runtime for bytecode
signatures just as it was in ClamAV 0.103.
@ALL:
In 'clamav 0.104.0' there is no appropriate cmake option for
"CONFIGURE_FLAGS = --disable-fanotify" for ARM buildings anymore.
Perhaps there is a kernel option for this?
=> https://docs.clamav.net/manual/OnAccess.html#requirements
Signed-off-by: Matthias Fischer <matthias.fischer@ipfire.org>
Reviewed-by: Michael Tremer <michael.tremer@ipfire.org>
Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>
The clamav database is quite large and occupies valuable
space on the root partition that on older systems is only
2GB large. This change moves the virus definition database
to the /var partition which is larger and supposed to hold
data like this anyway.
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
