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Sigurnosni nedostaci programskog paketa clamav

  • Detalji os-a: WN7
  • Važnost: IMP
  • Operativni sustavi: L
  • Kategorije: LSU

openSUSE Security Update: Security update for clamav

Announcement ID: openSUSE-SU-2020:2276-1
Rating: moderate
References: #1104457 #1118459 #1130721 #1144504 #1149458
Cross-References: CVE-2019-12625 CVE-2019-12900 CVE-2019-15961
CVE-2019-1785 CVE-2019-1786 CVE-2019-1787
CVE-2019-1788 CVE-2019-1789 CVE-2019-1798
CVE-2020-3123 CVE-2020-3327 CVE-2020-3341
CVE-2020-3350 CVE-2020-3481
Affected Products:
openSUSE Leap 15.2

An update that fixes 14 vulnerabilities is now available.


This update for clamav fixes the following issues:

clamav was updated to the new major release 0.103.0.

Note that libclamav was changed incompatible, if you have a 3rd party
application that uses libclamav, it needs to be rebuilt.

Update to 0.103.0

* clamd can now reload the signature database without blocking scanning.
This multi-threaded database reload improvement was made possible thanks
to a community effort.

– Non-blocking database reloads are now the default behavior. Some
systems that are more constrained on RAM may need to disable
non-blocking reloads as it will temporarily consume two times as much
memory. We added a new clamd config option ConcurrentDatabaseReload,
which may be set to no.

* Fix clamav-milter.service (requires clamd.service to run)

Update to 0.102.4

* CVE-2020-3350: Fix a vulnerability wherein a malicious user could
replace a scan target’s directory with a symlink to another path to
trick clamscan, clamdscan, or clamonacc into removing or moving a
different file (eg. a critical system file). The issue would affect
users that use the –move or –remove options for clamscan, clamdscan,
and clamonacc.
* CVE-2020-3327: Fix a vulnerability in the ARJ archive parsing module
in ClamAV 0.102.3 that could cause a Denial-of-Service (DoS)
condition. Improper bounds checking results in an
out-of-bounds read which could cause a crash. The previous fix for
this CVE in 0.102.3 was incomplete. This fix correctly resolves the
* CVE-2020-3481: Fix a vulnerability in the EGG archive module in ClamAV
0.102.0 – 0.102.3 could cause a Denial-of-Service (DoS) condition.
Improper error handling may result in a crash due to a NULL pointer
dereference. This vulnerability is mitigated for those using the
official ClamAV signature databases because the file type signatures
in daily.cvd will not enable the EGG archive parser in versions
affected by the vulnerability.

Update to 0.102.3

* CVE-2020-3327: Fix a vulnerability in the ARJ archive parsing module
in ClamAV 0.102.2 that could cause a Denial-of-Service (DoS)
condition. Improper bounds checking of an unsigned variable results in
an out-of-bounds read which causes a crash.
* CVE-2020-3341: Fix a vulnerability in the PDF parsing module in ClamAV
0.101 – 0.102.2 that could cause a Denial-of-Service (DoS) condition.
Improper size checking of a buffer used to initialize AES decryption
routines results in an out-of-bounds read which may cause a crash.
* Fix “Attempt to allocate 0 bytes” error when parsing some PDF
* Fix a couple of minor memory leaks.
* Updated libclamunrar to UnRAR 5.9.2.

Update to 0.102.2:

* CVE-2020-3123: A denial-of-service (DoS) condition may occur when
using the optional credit card data-loss-prevention (DLP) feature.
Improper bounds checking of an unsigned variable resulted in an
out-of-bounds read, which causes a crash.
* Significantly improved the scan speed of PDF files on Windows.
* Re-applied a fix to alleviate file access issues when scanning RAR
files in downstream projects that use libclamav where the scanning
engine is operating in a low-privilege process. This bug was
originally fixed in 0.101.2 and the fix was mistakenly omitted from
* Fixed an issue where freshclam failed to update if the database
version downloaded is one version older than advertised. This
situation may
occur after a new database version is published. The issue affected
users downloading the whole CVD database file.
* Changed the default freshclam ReceiveTimeout setting to 0 (infinite).
The ReceiveTimeout had caused needless database update failures for
users with slower internet connections.
* Correctly display the number of kilobytes (KiB) in progress bar and
reduced the size of the progress bar to accommodate 80-character width
* Fixed an issue where running freshclam manually causes a daemonized
freshclam process to fail when it updates because the manual instance
deletes the temporary download directory. The freshclam temporary
files will now download to a unique directory created at the time of
an update instead of using a hardcoded directory created/destroyed at
the program start/exit.
* Fix for freshclam’s OnOutdatedExecute config option.
* Fixes a memory leak in the error condition handling for the email
* Improved bound checking and error handling in ARJ archive parser.
* Improved error handling in PDF parser.
* Fix for memory leak in byte-compare signature handler.

– The freshclam.service should not be started before the network is
online (it checks for updates immediately upon service start)

Update to 0.102.1:

* CVE-2019-15961, bsc#1157763: A Denial-of-Service (DoS) vulnerability
may occur when scanning a specially crafted email file as a result of
excessively long scan times. The issue is resolved by implementing
several maximums in parsing MIME messages and by optimizing use of
memory allocation.
* Build system fixes to build clamav-milter, to correctly link with
libxml2 when detected, and to correctly detect fanotify for on-access
scanning feature support.
* Signature load time is significantly reduced by changing to a more
efficient algorithm for loading signature patterns and allocating the
AC trie. Patch courtesy of Alberto Wu.
* Introduced a new configure option to statically link libjson-c with
libclamav. Static linking with libjson is highly recommended to
prevent crashes in applications that use libclamav alongside another
JSON parsing library.
* Null-dereference fix in email parser when using the
–gen-json metadata option.
* Fixes for Authenticode parsing and certificate signature (.crb
database) bugs.

Update to 0.102.0:

* The On-Access Scanning feature has been migrated out of clamd and into
a brand new utility named clamonacc. This utility is similar to
clamdscan and clamav-milter in that it acts as a client to clamd. This
separation from clamd means that clamd no longer needs to run with
root privileges while scanning potentially malicious files. Instead,
clamd may drop privileges to run under an account that does not have
super-user. In addition to improving the security posture of running
clamd with On-Access enabled, this update fixed a few outstanding
– On-Access scanning for created and moved files (Extra-Scanning) is
– VirusEvent for On-Access scans is fixed.
– With clamonacc, it is now possible to copy, move, or remove a file
if the scan triggered an alert, just like with clamdscan.
* The freshclam database update utility has undergone a significant
update. This includes:
– Added support for HTTPS.
– Support for database mirrors hosted on ports other than 80.
– Removal of the mirror management feature (mirrors.dat).
– An all new libfreshclam library API.
– created new subpackage libfreshclam2

Update to 0.101.4:

* CVE-2019-12900: An out of bounds write in the NSIS bzip2 (bsc#1149458)
* CVE-2019-12625: Introduce a configurable time limit to mitigate zip
bomb vulnerability completely. Default is 2 minutes, configurable
useing the clamscan –max-scantime and for clamd using the MaxScanTime
config option (bsc#1144504)

Update to version 0.101.3:

* bsc#1144504: ZIP bomb causes extreme CPU spikes

Update to version 0.101.2 (bsc#1130721)

* CVE-2019-1787: An out-of-bounds heap read condition may occur when
scanning PDF documents. The defect is a failure to correctly keep
track of the number
of bytes remaining in a buffer when indexing file data.
* CVE-2019-1789: An out-of-bounds heap read condition may occur when
scanning PE files (i.e. Windows EXE and DLL files) that have been
packed using Aspack as a result of inadequate bound-checking.
* CVE-2019-1788: An out-of-bounds heap write condition may occur when
scanning OLE2 files such as Microsoft Office 97-2003 documents. The
invalid write happens when an invalid pointer is mistakenly used to
initialize a 32bit integer to zero. This is likely to crash the
* CVE-2019-1786: An out-of-bounds heap read condition may occur when
scanning malformed PDF documents as a result of improper
* CVE-2019-1785: A path-traversal write condition may occur as a result
of improper input validation when scanning RAR archives.
* CVE-2019-1798: A use-after-free condition may occur as a result of
improper error handling when scanning nested RAR archives.

This update was imported from the SUSE:SLE-15:Update update project.

Patch Instructions:

To install this openSUSE Security Update use the SUSE recommended installation methods
like YaST online_update or “zypper patch”.

Alternatively you can run the command listed for your product:

– openSUSE Leap 15.2:

zypper in -t patch openSUSE-2020-2276=1

Package List:

– openSUSE Leap 15.2 (x86_64):


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