RestrictedPython is a restricted execution environment for Python to run untrusted code. Python's "format" functionality allows someone controlling the format string to "read" all objects accessible through recursive attribute lookup and subscription from objects he can access. This can lead to critical information disclosure. With `RestrictedPython`, the format functionality is available via the `format` and `format_map` methods of `str` (and `unicode`) (accessed either via the class or its instances) and via `string.Formatter`. All known versions of `RestrictedPython` are vulnerable. This issue has been addressed in commit `4134aedcff1` which has been included in the 5.4 and 6.2 releases. Users are advised to upgrade. There are no known workarounds for this vulnerability.

The remote Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS / 24.10 host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-7355-1 advisory.

    Nakul Choudhary and Robert Xiao discovered that RestrictedPython did not properly sanitize certain inputs.
    An attacker could possibly use this issue to execute arbitrary code. This issue only affected Ubuntu 20.04     LTS and Ubuntu 22.04 LTS. (CVE-2023-37271)

    Abhishek Govindarasu, Ankush Menat and Ward Theunisse discovered that RestrictedPython did not correctly     handle certain format strings. An attacker could possibly use this issue to leak sensitive information.
    This issue only affected Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2023-41039)

    It was discovered that RestrictedPython did not correctly restrict access to certain fields. An attacker     could possibly use this issue to leak sensitive information. (CVE-2024-47532)

    It was discovered that RestrictedPython contained a type confusion vulnerability. An attacker could     possibly use this issue to execute arbitrary code. This issue only affected Ubuntu 24.04 LTS and Ubuntu     24.10. (CVE-2025-22153)

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

  - RestrictedPython is a restricted execution environment for Python to run untrusted code. Python's format     functionality allows someone controlling the format string to read all objects accessible through     recursive attribute lookup and subscription from objects he can access. This can lead to critical     information disclosure. With `RestrictedPython`, the format functionality is available via the `format`     and `format_map` methods of `str` (and `unicode`) (accessed either via the class or its instances) and via     `string.Formatter`. All known versions of `RestrictedPython` are vulnerable. This issue has been addressed     in commit `4134aedcff1` which has been included in the 5.4 and 6.2 releases. Users are advised to upgrade.
    There are no known workarounds for this vulnerability. (CVE-2023-41039)

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

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - RestrictedPython is a restricted execution environment for Python to run untrusted code. Python's "format"
    functionality allows someone controlling the format string to "read" all objects accessible through
    recursive attribute lookup and subscription from objects he can access. This can lead to critical
    information disclosure. With `RestrictedPython`, the format functionality is available via the `format`
    and `format_map` methods of `str` (and `unicode`) (accessed either via the class or its instances) and via
    `string.Formatter`. All known versions of `RestrictedPython` are vulnerable. This issue has been addressed
    in commit `4134aedcff1` which has been included in the 5.4 and 6.2 releases. Users are advised to upgrade.
    There are no known workarounds for this vulnerability. (CVE-2023-41039)

ID	Name	Product	Family	Severity
232986	Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS / 24.10 : RestrictedPython vulnerabilities (USN-7355-1)	Nessus	Ubuntu Local Security Checks	high
226619	Linux Distros Unpatched Vulnerability : CVE-2023-41039	Nessus	Misc.	high
420558	SCA: security update for RestrictedPython (GHSA-xjw2-6jm9-rf67)	Tenable Cloud Security	SCA Checks	high
420558	SCA: security update for RestrictedPython (GHSA-xjw2-6jm9-rf67)	Tenable Self-Hosted Container Security	SCA Checks	high

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CVE-2023-41039

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