A flaw was found in FFmpeg's TTY Demuxer. This vulnerability allows possible data exfiltration via improper parsing of non-TTY-compliant input files in HLS playlists.

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

  - A flaw was found in FFmpeg's TTY Demuxer. This vulnerability allows possible data exfiltration via     improper parsing of non-TTY-compliant input files in HLS playlists. (CVE-2023-6602)

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

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4241 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-4241-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                          Adrian Bunk     July 14, 2025                                 https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : ffmpeg     Version        : 7:4.3.9-0+deb11u1     CVE ID         : CVE-2023-6601 CVE-2023-6602 CVE-2023-6604 CVE-2023-6605

    Multiple vulnerabilities have been fixed in the multimedia framework FFmpeg.

    CVE-2023-6601

        Triggering arbitrary demuxers via base64 data URIs

    CVE-2023-6602

        Improper parsing of input files in HLS playlists

    CVE-2023-6604

        Demuxing of arbitrary data as XBIN-formatted data

    CVE-2023-6605

        Arbitrary HTTP GET requests via crafted DASH playlist

    For Debian 11 bullseye, these problems have been fixed in version     7:4.3.9-0+deb11u1.

    We recommend that you upgrade your ffmpeg packages.

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

    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 version of Tencent Linux installed on the remote TencentOS Server 4 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the TSSA-2025:0114 advisory.

    Package updates are available for TencentOS Server 4 that fix the following vulnerabilities:

    CVE-2023-6602:
    A flaw was found in FFmpeg's TTY Demuxer. This vulnerability allows possible data exfiltration via     improper parsing of non-TTY-compliant input files in HLS playlists.

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

ID	Name	Product	Family	Severity
256617	Linux Distros Unpatched Vulnerability : CVE-2023-6602	Nessus	Misc.	medium
242064	Debian dla-4241 : ffmpeg - security update	Nessus	Debian Local Security Checks	medium
239725	TencentOS Server 4: ffmpeg (TSSA-2025:0114)	Nessus	Tencent Local Security Checks	medium

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CVE-2023-6602

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