A flaw was found in FFmpeg's HLS demuxer. This vulnerability allows bypassing unsafe file extension checks and triggering arbitrary demuxers via base64-encoded data URIs appended with specific file extensions.

The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:20710-1 advisory.

    Changes in ffmpeg-4:

    - CVE-2025-59728: Fixed out-of-bounds NUL-byte write when calculating the content path in handling of     MPEG-DASH manifests (bsc#1251137).
    - CVE-2025-7700: Fixed a NULL Pointer Dereference in the ALS Decoder (bsc#1246790)
    - CVE-2024-36618: Fixed a integer overflow in AVI demuxer (bsc#1234020)
    - CVE-2023-6601: Fixed HLS Unsafe File Extension Bypass (bsc#1220545).

    - Update to release 4.4.6
      * lavc/libx265: unbreak build for X265_BUILD >= 210
      * ARM: vp9mc: Load only 12 pixels in the 4 pixel wide         horizontal filter
      * rtmpproto: Avoid rare crashes in the `fail:` codepath in         rtmp_open
      * avcodec/snow: Fix off by 1 error in run_buffer
      * avcodec/mpegvideo_enc: Check FLV1 resolution limits

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-2026:0229-1 advisory.

    - CVE-2023-6601: Fixed HLS Unsafe File Extension Bypass (bsc#1220545).
    - CVE-2025-63757: Fixed integer overflow in yuv2ya16_X_c_template() (bsc#1255392).

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 SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:0198-1 advisory.

    - CVE-2023-6601: Fixed HLS Unsafe File Extension Bypass (bsc#1220545).
    - CVE-2025-63757: Fixed integer overflow in yuv2ya16_X_c_template() (bsc#1255392).

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 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 HLS demuxer. This vulnerability allows bypassing unsafe file extension checks     and triggering arbitrary demuxers via base64-encoded data URIs appended with specific file extensions.
    (CVE-2023-6601)

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.

ID	Name	Product	Family	Severity
313747	openSUSE 16 Security Update : ffmpeg-4 (openSUSE-SU-2026:20710-1)	Nessus	SuSE Local Security Checks	high
296441	SUSE SLES15 Security Update : ffmpeg-4 (SUSE-SU-2026:0229-1)	Nessus	SuSE Local Security Checks	medium
294934	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : ffmpeg-4 (SUSE-SU-2026:0198-1)	Nessus	SuSE Local Security Checks	medium
256610	Linux Distros Unpatched Vulnerability : CVE-2023-6601	Nessus	Misc.	medium
242064	Debian dla-4241 : ffmpeg - security update	Nessus	Debian Local Security Checks	medium

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