7-Zip SquashFS File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of 7-Zip. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of SQFS files. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-18589.

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4576 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-4576-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                      Sylvain Beucler     May 11, 2026                                  https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : p7zip     Version        : 16.02+really25.01+dfsg-0+deb11u1     CVE ID         : CVE-2022-47069 CVE-2023-31102 CVE-2023-40481 CVE-2023-52168                      CVE-2023-52169 CVE-2024-11612 CVE-2025-11001 CVE-2025-11002                      CVE-2025-53817 CVE-2025-55188     Debian Bug     : 1111068

    Multiple vulnerabilities were discovered in p7zip, a now unmaintained     fork of 7-Zip, a file archiver handling multiple formats.

    To address these security vulnerabilities, whose fixes are     unfortunately not isolated, this update replaces p7zip with 7-Zip v25     (which now supports GNU/Linux natively), slightly modified to make it     reasonably compatible with p7zip.

    CVE-2022-47069

        heap-buffer-overflow vulnerability via the function         NArchive::NZip::CInArchive::FindCd

    CVE-2023-31102

        Ppmd7.c allows an integer underflow and invalid read operation via         a crafted 7Z archive.

    CVE-2023-40481

        SquashFS File Parsing Out-Of-Bounds Write RCE

    CVE-2023-52168

        heap-based buffer overflow in NTFS handler

    CVE-2023-52169

        out-of-bounds read in NTFS handler

    CVE-2024-11612

        CopyCoder Infinite Loop Denial-of-Service

    CVE-2025-11001

        ZIP File Parsing Directory Traversal RCE

    CVE-2025-11002

        ZIP File Parsing Directory Traversal RCE

    CVE-2025-53817

        null pointer dereference in the Compound handler may lead to         denial of service

    CVE-2025-55188

        does not always properly handle symbolic links

    For Debian 11 bullseye, these problems have been fixed in version     16.02+really25.01+dfsg-0+deb11u1.

    We recommend that you upgrade your p7zip packages.

    For the detailed security status of p7zip please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/p7zip

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian 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 Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 7-Zip SquashFS File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability     allows remote attackers to execute arbitrary code on affected installations of 7-Zip. User interaction is     required to exploit this vulnerability in that the target must visit a malicious page or open a malicious     file. The specific flaw exists within the parsing of SQFS files. The issue results from the lack of proper     validation of user-supplied data, which can result in a write past the end of an allocated buffer. An     attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-     CAN-18589. (CVE-2023-40481)

Note that Nessus relies on the presence of the package as reported by the vendor.

The version of 7-Zip installed on the remote Windows host is below 23.00. It is, therefore, affected by multiple vulnerabilities:

  - A remote code execution vulnerability exists in 7-zip due to an integer underflow. An unauthenticated,     remote attacker can exploit this, by tricking a user into opening a specially crafted archive, to execute     arbitrary code on the system. (CVE-2023-31102)

  - A remote code execution vulnerability exists in 7-zip due to an out-of-bounds write. An unauthenticated,     remote attacker can exploit this, by tricking a user into opening a specially crafted archive, to execute     arbitrary code on the system. (CVE-2023-40481)

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

ID	Name	Product	Family	Type	Severity
314237	Debian dla-4576 : p7zip - security update	Nessus	Debian Local Security Checks	Local	medium
226276	Linux Distros Unpatched Vulnerability : CVE-2023-40481	Nessus	Misc.	Local	high
180360	7-Zip < 23.00 Multiple Vulnerabilities	Nessus	Windows	Local	high

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CVE-2023-40481

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