In ZNC before 1.9.1, remote code execution can occur in modtcl via a KICK.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - In ZNC before 1.9.1, remote code execution can occur in modtcl via a KICK. (CVE-2024-39844)

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

The remote Fedora 41 host has packages installed that are affected by a vulnerability as referenced in the FEDORA-2024-1c078a4771 advisory.

    * Fix CVE-2024-39844

    https://wiki.znc.in/ChangeLog/1.9.0

Tenable has extracted the preceding description block directly from the Fedora 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 remote host is affected by the vulnerability described in GLSA-202409-23 (ZNC: Remote Code Execution)

    ZNC's modtcl could allow for remote code execution via a KICK.

Tenable has extracted the preceding description block directly from the Gentoo Linux 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 remote Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-6990-1 advisory.

    Johannes Kuhn (DasBrain) discovered that znc incorrectly handled user input under certain operations. An     attacker could possibly use this issue to execute arbitrary code on a user's system if the user was     tricked into joining a malicious server.

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 8057d198-4d26-11ef-8e64-641c67a117d8 advisory.

    Mitre reports:
    In ZNC before 1.9.1, remote code execution can occur in modtcl via a KICK.

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.

The remote Debian 11 / 12 host has packages installed that are affected by a vulnerability as referenced in the dsa-5725 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-5725-1                   security@debian.org     https://www.debian.org/security/                     Salvatore Bonaccorso     July 03, 2024                         https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : znc     CVE ID         : CVE-2024-39844     Debian Bug     : 1075729

    Johannes Kuhn discovered that messages and channel names are not     properly escaped in the modtcl module in ZNC, a IRC bouncer, which could     result in remote code execution via specially crafted messages.

    For the oldstable distribution (bullseye), this problem has been fixed     in version 1.8.2-2+deb11u1.

    For the stable distribution (bookworm), this problem has been fixed in     version 1.8.2-3.1+deb12u1.

    We recommend that you upgrade your znc packages.

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

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

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian 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
256015	Linux Distros Unpatched Vulnerability : CVE-2024-39844	Nessus	Misc.	critical
211271	Fedora 41 : znc / znc-clientbuffer / znc-push (2024-1c078a4771)	Nessus	Fedora Local Security Checks	critical
207670	GLSA-202409-23 : ZNC: Remote Code Execution	Nessus	Gentoo Local Security Checks	critical
206624	Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS : znc vulnerability (USN-6990-1)	Nessus	Ubuntu Local Security Checks	critical
204831	FreeBSD : znc -- remote code execution vulnerability (8057d198-4d26-11ef-8e64-641c67a117d8)	Nessus	FreeBSD Local Security Checks	critical
201884	Debian dsa-5725 : znc - security update	Nessus	Debian Local Security Checks	critical

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