A vulnerability in the Object Linking and Embedding 2 (OLE2) decryption routine of ClamAV could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to an integer underflow in a bounds check that allows for a heap buffer overflow read. An attacker could exploit this vulnerability by submitting a crafted file containing OLE2 content to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to terminate the ClamAV scanning process, resulting in a DoS condition on the affected software. For a description of this vulnerability, see the . Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2025:0327-1 advisory.

    New version 1.4.2:

      * CVE-2025-20128, bsc#1236307: Fixed a possible buffer overflow         read bug in the OLE2 file parser that could cause a         denial-of-service (DoS) condition.

    - Start clamonacc with --fdpass to avoid errors due to       clamd not being able to access user files. (bsc#1232242)

    - New version 1.4.1:

      * https://blog.clamav.net/2024/09/clamav-141-132-107-and-010312-security.html

    - New version 1.4.0:

      * Added support for extracting ALZ archives.
      * Added support for extracting LHA/LZH archives.
      * 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.
      * https://blog.clamav.net/2024/08/clamav-140-feature-release-and-clamav.html

    - New version 1.3.2:

      * CVE-2024-20506: Changed the logging module to disable following         symlinks on Linux and Unix systems so as to prevent an attacker         with existing access to the 'clamd' or 'freshclam' services from         using a symlink to corrupt system files.
      * CVE-2024-20505: Fixed a possible out-of-bounds read bug in the PDF         file parser that could cause a denial-of-service condition.
      * Removed unused Python modules from freshclam tests including         deprecated 'cgi' module that is expected to cause test failures in         Python 3.13.
      * Fix unit test caused by expiring signing certificate.
      * Fixed a build issue on Windows with newer versions of Rust. Also         upgraded GitHub Actions imports to fix CI failures.
      * Fixed an unaligned pointer dereference issue on select architectures.
      * Fixes to Jenkins CI pipeline.


    - New Version: 1.3.1:

      * CVE-2024-20380: Fixed a possible crash in the HTML file parser         that could cause a denial-of-service (DoS) condition.
      * Updated select Rust dependencies to the latest versions.
      * 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
      * Added the new 'valhalla' database name to the list of optional         databases in preparation for future work.

    - New version: 1.3.0:

      * 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.
      * Added file type recognition for compiled Python ('.pyc') files.
      * Improved support for decrypting PDFs with empty passwords.
      * Fixed a warning when scanning some HTML files.
      * 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.

    - New version: 1.2.0:

      * Added support for extracting Universal Disk Format (UDF)         partitions.
      * Added an option to customize the size of ClamAV's clean file         cache.
      * Raised the MaxScanSize limit so the total amount of data         scanned when scanning a file or archive may exceed 4 gigabytes.
      * Added ability for Freshclam to use a client certificate PEM         file and a private key PEM file for authentication to a private         mirror.
      * Fix an issue extracting files from ISO9660 partitions where the         files are listed in the plain ISO tree and there also exists an         empty Joliet tree.
      * PID and socket are now located under /run/clamav/clamd.pid and         /run/clamav/clamd.sock .
      * bsc#1211594: Fixed an issue where ClamAV does not abort the         signature load process after partially loading an invalid         signature.

    - New version 1.1.0:

      * https://blog.clamav.net/2023/05/clamav-110-released.html
      * 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.
      * Added a new option --fail-if-cvd-older-than=days to clamscan         and clamd, and FailIfCvdOlderThan to clamd.conf
      * Added a new function 'cl_cvdgetage()' to the libclamav API.
      * Added a new function 'cl_engine_set_clcb_vba()' to the         libclamav API.
    - bsc#1180296: Integrate clamonacc as a service.
    - New version 1.0.1 LTS (including changes in 0.104 and 0.105):
      * As of ClamAV 0.104, CMake is required to build ClamAV.
      * As of ClamAV 0.105, Rust is now required to compile ClamAV.
      * Increased the default limits for file and scan size:
        * MaxScanSize: 100M to 400M
        * MaxFileSize: 25M to 100M
        * StreamMaxLength: 25M to 100M
        * PCREMaxFileSize: 25M to 100M
        * MaxEmbeddedPE: 10M to 40M
        * MaxHTMLNormalize: 10M to 40M
        * MaxScriptNormalize: 5M to 20M
        * MaxHTMLNoTags: 2M to 8M
      * Added image fuzzy hash subsignatures for logical signatures.
      * Support for decrypting read-only OLE2-based XLS files that are         encrypted with the default password.
      * Overhauled the implementation of the all-match feature.
      * Added a new callback to the public API for inspecting file         content during a scan at each layer of archive extraction.
      * Added a new function to the public API for unpacking CVD         signature archives.
      * 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.
      * For a full list of changes see the release announcements:
        * https://blog.clamav.net/2022/11/clamav-100-lts-released.html
        * https://blog.clamav.net/2022/05/clamav-01050-01043-01036-released.html
        * https://blog.clamav.net/2021/09/clamav-01040-released.html
    - Build clamd with systemd support.

    * CVE-2023-20197: Fixed a possible denial of service vulnerability in       the HFS+ file parser. (bsc#1214342)
    * CVE-2018-14679: Fixed that an issue was discovered in mspack/chmd.c       in libmspack before 0.7alpha. There isan off-by-one error in the CHM       PMGI/PMGL chunk number validity checks, which could lead to denial of       service (uninitialized da (bsc#1103032)

    - Package huge .html documentation in a separate subpackage.

    - Update to 0.103.7 (bsc#1202986)

      - Zip parser: tolerate 2-byte overlap in file entries
      - Fix bug with logical signature Intermediates feature
      - Update to UnRAR v6.1.7
      - Patch UnRAR: allow skipping files in solid archives
      - Patch UnRAR: limit dict winsize to 1GB

    - Use a split-provides for clamav-milter instead of recommending it.
    - Package clamav-milter in a subpackage
    - Remove virus signatures upon uninstall
    - Check for database existence before starting clamd
    - Restart clamd when it exits
    - Don't daemonize freshclam, but use a systemd timer instead to       trigger updates

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2025:0325-1 advisory.

    New version 1.4.2:

      * CVE-2025-20128, bsc#1236307: Fixed a possible buffer overflow         read bug in the OLE2 file parser that could cause a         denial-of-service (DoS) condition.

    - Start clamonacc with --fdpass to avoid errors due to       clamd not being able to access user files. (bsc#1232242)

    - New version 1.4.1:

      * https://blog.clamav.net/2024/09/clamav-141-132-107-and-010312-security.html

    - New version 1.4.0:

      * Added support for extracting ALZ archives.
      * Added support for extracting LHA/LZH archives.
      * 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.
      * https://blog.clamav.net/2024/08/clamav-140-feature-release-and-clamav.html

    - New version 1.3.2:

      * CVE-2024-20506: Changed the logging module to disable following         symlinks on Linux and Unix systems so as to prevent an attacker         with existing access to the 'clamd' or 'freshclam' services from         using a symlink to corrupt system files.
      * CVE-2024-20505: Fixed a possible out-of-bounds read bug in the PDF         file parser that could cause a denial-of-service condition.
      * Removed unused Python modules from freshclam tests including         deprecated 'cgi' module that is expected to cause test failures in         Python 3.13.
      * Fix unit test caused by expiring signing certificate.
      * Fixed a build issue on Windows with newer versions of Rust. Also         upgraded GitHub Actions imports to fix CI failures.
      * Fixed an unaligned pointer dereference issue on select architectures.
      * Fixes to Jenkins CI pipeline.


    - New Version: 1.3.1:

      * CVE-2024-20380: Fixed a possible crash in the HTML file parser         that could cause a denial-of-service (DoS) condition.
      * Updated select Rust dependencies to the latest versions.
      * 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
      * Added the new 'valhalla' database name to the list of optional         databases in preparation for future work.

    - New version: 1.3.0:

      * 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.
      * Added file type recognition for compiled Python ('.pyc') files.
      * Improved support for decrypting PDFs with empty passwords.
      * Fixed a warning when scanning some HTML files.
      * 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.

    - New version: 1.2.0:

      * Added support for extracting Universal Disk Format (UDF)         partitions.
      * Added an option to customize the size of ClamAV's clean file         cache.
      * Raised the MaxScanSize limit so the total amount of data         scanned when scanning a file or archive may exceed 4 gigabytes.
      * Added ability for Freshclam to use a client certificate PEM         file and a private key PEM file for authentication to a private         mirror.
      * Fix an issue extracting files from ISO9660 partitions where the         files are listed in the plain ISO tree and there also exists an         empty Joliet tree.
      * PID and socket are now located under /run/clamav/clamd.pid and         /run/clamav/clamd.sock .
      * bsc#1211594: Fixed an issue where ClamAV does not abort the         signature load process after partially loading an invalid         signature.

    - New version 1.1.0:

      * https://blog.clamav.net/2023/05/clamav-110-released.html
      * 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.
      * Added a new option --fail-if-cvd-older-than=days to clamscan         and clamd, and FailIfCvdOlderThan to clamd.conf
      * Added a new function 'cl_cvdgetage()' to the libclamav API.
      * Added a new function 'cl_engine_set_clcb_vba()' to the         libclamav API.
    - bsc#1180296: Integrate clamonacc as a service.
    - New version 1.0.1 LTS (including changes in 0.104 and 0.105):
      * As of ClamAV 0.104, CMake is required to build ClamAV.
      * As of ClamAV 0.105, Rust is now required to compile ClamAV.
      * Increased the default limits for file and scan size:
        * MaxScanSize: 100M to 400M
        * MaxFileSize: 25M to 100M
        * StreamMaxLength: 25M to 100M
        * PCREMaxFileSize: 25M to 100M
        * MaxEmbeddedPE: 10M to 40M
        * MaxHTMLNormalize: 10M to 40M
        * MaxScriptNormalize: 5M to 20M
        * MaxHTMLNoTags: 2M to 8M
      * Added image fuzzy hash subsignatures for logical signatures.
      * Support for decrypting read-only OLE2-based XLS files that are         encrypted with the default password.
      * Overhauled the implementation of the all-match feature.
      * Added a new callback to the public API for inspecting file         content during a scan at each layer of archive extraction.
      * Added a new function to the public API for unpacking CVD         signature archives.
      * 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.
      * For a full list of changes see the release announcements:
        * https://blog.clamav.net/2022/11/clamav-100-lts-released.html
        * https://blog.clamav.net/2022/05/clamav-01050-01043-01036-released.html
        * https://blog.clamav.net/2021/09/clamav-01040-released.html
    - Build clamd with systemd support.

    * CVE-2023-20197: Fixed a possible denial of service vulnerability in       the HFS+ file parser. (bsc#1214342)
    * CVE-2018-14679: Fixed that an issue was discovered in mspack/chmd.c       in libmspack before 0.7alpha. There isan off-by-one error in the CHM       PMGI/PMGL chunk number validity checks, which could lead to denial of       service (uninitialized da (bsc#1103032)

    - Package huge .html documentation in a separate subpackage.

    - Update to 0.103.7 (bsc#1202986)

      - Zip parser: tolerate 2-byte overlap in file entries
      - Fix bug with logical signature Intermediates feature
      - Update to UnRAR v6.1.7
      - Patch UnRAR: allow skipping files in solid archives
      - Patch UnRAR: limit dict winsize to 1GB

    - Use a split-provides for clamav-milter instead of recommending it.
    - Package clamav-milter in a subpackage
    - Remove virus signatures upon uninstall
    - Check for database existence before starting clamd
    - Restart clamd when it exits
    - Don't daemonize freshclam, but use a systemd timer instead to       trigger updates

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2025:0328-1 advisory.

    New version 1.4.2:

      * CVE-2025-20128, bsc#1236307: Fixed a possible buffer overflow         read bug in the OLE2 file parser that could cause a         denial-of-service (DoS) condition.

    - Start clamonacc with --fdpass to avoid errors due to       clamd not being able to access user files. (bsc#1232242)

    - New version 1.4.1:

      * https://blog.clamav.net/2024/09/clamav-141-132-107-and-010312-security.html

    - New version 1.4.0:

      * Added support for extracting ALZ archives.
      * Added support for extracting LHA/LZH archives.
      * 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.
      * https://blog.clamav.net/2024/08/clamav-140-feature-release-and-clamav.html

    - New version 1.3.2:

      * CVE-2024-20506: Changed the logging module to disable following         symlinks on Linux and Unix systems so as to prevent an attacker         with existing access to the 'clamd' or 'freshclam' services from         using a symlink to corrupt system files.
      * CVE-2024-20505: Fixed a possible out-of-bounds read bug in the PDF         file parser that could cause a denial-of-service condition.
      * Removed unused Python modules from freshclam tests including         deprecated 'cgi' module that is expected to cause test failures in         Python 3.13.
      * Fix unit test caused by expiring signing certificate.
      * Fixed a build issue on Windows with newer versions of Rust. Also         upgraded GitHub Actions imports to fix CI failures.
      * Fixed an unaligned pointer dereference issue on select architectures.
      * Fixes to Jenkins CI pipeline.


    - New Version: 1.3.1:

      * CVE-2024-20380: Fixed a possible crash in the HTML file parser         that could cause a denial-of-service (DoS) condition.
      * Updated select Rust dependencies to the latest versions.
      * 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
      * Added the new 'valhalla' database name to the list of optional         databases in preparation for future work.

    - New version: 1.3.0:

      * 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.
      * Added file type recognition for compiled Python ('.pyc') files.
      * Improved support for decrypting PDFs with empty passwords.
      * Fixed a warning when scanning some HTML files.
      * 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.

    - New version: 1.2.0:

      * Added support for extracting Universal Disk Format (UDF)         partitions.
      * Added an option to customize the size of ClamAV's clean file         cache.
      * Raised the MaxScanSize limit so the total amount of data         scanned when scanning a file or archive may exceed 4 gigabytes.
      * Added ability for Freshclam to use a client certificate PEM         file and a private key PEM file for authentication to a private         mirror.
      * Fix an issue extracting files from ISO9660 partitions where the         files are listed in the plain ISO tree and there also exists an         empty Joliet tree.
      * PID and socket are now located under /run/clamav/clamd.pid and         /run/clamav/clamd.sock .
      * bsc#1211594: Fixed an issue where ClamAV does not abort the         signature load process after partially loading an invalid         signature.

    - New version 1.1.0:

      * https://blog.clamav.net/2023/05/clamav-110-released.html
      * 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.
      * Added a new option --fail-if-cvd-older-than=days to clamscan         and clamd, and FailIfCvdOlderThan to clamd.conf
      * Added a new function 'cl_cvdgetage()' to the libclamav API.
      * Added a new function 'cl_engine_set_clcb_vba()' to the         libclamav API.
    - bsc#1180296: Integrate clamonacc as a service.
    - New version 1.0.1 LTS (including changes in 0.104 and 0.105):
      * As of ClamAV 0.104, CMake is required to build ClamAV.
      * As of ClamAV 0.105, Rust is now required to compile ClamAV.
      * Increased the default limits for file and scan size:
        * MaxScanSize: 100M to 400M
        * MaxFileSize: 25M to 100M
        * StreamMaxLength: 25M to 100M
        * PCREMaxFileSize: 25M to 100M
        * MaxEmbeddedPE: 10M to 40M
        * MaxHTMLNormalize: 10M to 40M
        * MaxScriptNormalize: 5M to 20M
        * MaxHTMLNoTags: 2M to 8M
      * Added image fuzzy hash subsignatures for logical signatures.
      * Support for decrypting read-only OLE2-based XLS files that are         encrypted with the default password.
      * Overhauled the implementation of the all-match feature.
      * Added a new callback to the public API for inspecting file         content during a scan at each layer of archive extraction.
      * Added a new function to the public API for unpacking CVD         signature archives.
      * 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.
      * For a full list of changes see the release announcements:
        * https://blog.clamav.net/2022/11/clamav-100-lts-released.html
        * https://blog.clamav.net/2022/05/clamav-01050-01043-01036-released.html
        * https://blog.clamav.net/2021/09/clamav-01040-released.html
    - Build clamd with systemd support.

    * CVE-2023-20197: Fixed a possible denial of service vulnerability in       the HFS+ file parser. (bsc#1214342)
    * CVE-2018-14679: Fixed that an issue was discovered in mspack/chmd.c       in libmspack before 0.7alpha. There isan off-by-one error in the CHM       PMGI/PMGL chunk number validity checks, which could lead to denial of       service (uninitialized da (bsc#1103032)

    - Package huge .html documentation in a separate subpackage.

    - Update to 0.103.7 (bsc#1202986)

      - Zip parser: tolerate 2-byte overlap in file entries
      - Fix bug with logical signature Intermediates feature
      - Update to UnRAR v6.1.7
      - Patch UnRAR: allow skipping files in solid archives
      - Patch UnRAR: limit dict winsize to 1GB

    - Use a split-provides for clamav-milter instead of recommending it.
    - Package clamav-milter in a subpackage
    - Remove virus signatures upon uninstall
    - Check for database existence before starting clamd
    - Restart clamd when it exits
    - Don't daemonize freshclam, but use a systemd timer instead to       trigger updates

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

According to its self-reported version, Cisco Secure Endpoint Connector for ClamAV is affected by a vulnerability.

  - A vulnerability in the Object Linking and Embedding 2 (OLE2) decryption routine of ClamAV could allow an     unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This     vulnerability is due to an integer underflow in a bounds check that allows for a heap buffer overflow     read. An attacker could exploit this vulnerability by submitting a crafted file containing OLE2 content to     be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to terminate the     ClamAV scanning process, resulting in a DoS condition on the affected software. For a description of this     vulnerability, see the . Cisco has released software updates that address this vulnerability. There are no     workarounds that address this vulnerability. (CVE-2025-20128)

Please see the included Cisco BIDs and Cisco Security Advisory for more information.

The remote Ubuntu 24.04 LTS / 24.10 host has packages installed that are affected by a vulnerability as referenced in the USN-7229-1 advisory.

    It was discovered that ClamAV incorrectly handled decrypting OLE2 content. A remote attacker could     possibly use this issue to cause ClamAV to crash, resulting in a denial of service.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 1e109b60-d92e-11ef-a661-08002784c58d advisory.

    The ClamAV project reports:

                A possible buffer overflow read bug is found in the OLE2                 file parser that could cause a denial-of-service (DoS)                 condition.


Tenable has extracted the preceding description block directly from the FreeBSD security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
214899	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : clamav (SUSE-SU-2025:0327-1)	Nessus	SuSE Local Security Checks	medium
214896	SUSE SLES15 Security Update : clamav (SUSE-SU-2025:0325-1)	Nessus	SuSE Local Security Checks	medium
214890	SUSE SLES12 Security Update : clamav (SUSE-SU-2025:0328-1)	Nessus	SuSE Local Security Checks	medium
214849	Cisco Secure Endpoint ClamAV OLE2 File Format Decryption DoS (cisco-sa-clamav-ole2-H549rphA)	Nessus	CISCO	medium
214669	Ubuntu 24.04 LTS / 24.10 : ClamAV vulnerability (USN-7229-1)	Nessus	Ubuntu Local Security Checks	medium
214550	FreeBSD : clamav -- Possbile denial-of-service vulnerability (1e109b60-d92e-11ef-a661-08002784c58d)	Nessus	FreeBSD Local Security Checks	medium

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