# CVE-2018-19857: libvlc5: The CAF demuxer in modules/demux/caf.c in VideoLAN VLC media player 3.0.4 may read memory from an uninitialized point...

CVE-2018-19857 is fixed in 20 products on 1 platform, first by libvlc-bin 3.0.7.1-0ubuntu18.04.1, released July 13, 2019. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2018-19857
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0392
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 4, 2018

## Description

The CAF demuxer in modules/demux/caf.c in VideoLAN VLC media player 3.0.4 may read memory from an uninitialized pointer when processing magic cookies in CAF files, because a ReadKukiChunk() cast converts a return value to an unsigned int even if that value is negative. This could result in a denial of service and/or a potential infoleak.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libvlc-bin Ubuntu 18.04.6 LTS (bionic) | 3.0.7.1-0ubuntu18.04.1 | [libvlc-bin 3.0.7.1-0ubuntu18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libvlc-bin-3.0.7.1-0ubuntu18.04.1.md) | Jul 13, 2019 |
| Linux | libvlc5 Ubuntu 18.04.6 LTS (bionic) | 3.0.7.1-0ubuntu18.04.1 | [libvlc5 3.0.7.1-0ubuntu18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libvlc5-3.0.7.1-0ubuntu18.04.1.md) | Jul 13, 2019 |
| Linux | libvlccore9 Ubuntu 18.04.6 LTS (bionic) | 3.0.7.1-0ubuntu18.04.1 | [libvlccore9 3.0.7.1-0ubuntu18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libvlccore9-3.0.7.1-0ubuntu18.04.1.md) | Jul 13, 2019 |
| Linux | vlc Ubuntu 18.04.6 LTS (bionic) | 3.0.7.1-0ubuntu18.04.1 | [vlc 3.0.7.1-0ubuntu18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-vlc-3.0.7.1-0ubuntu18.04.1.md) | Jul 13, 2019 |
| Linux | vlc-bin Ubuntu 18.04.6 LTS (bionic) | 3.0.7.1-0ubuntu18.04.1 | [vlc-bin 3.0.7.1-0ubuntu18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-vlc-bin-3.0.7.1-0ubuntu18.04.1.md) | Jul 13, 2019 |
| Linux | vlc-data Ubuntu 18.04.6 LTS (bionic) | 3.0.7.1-0ubuntu18.04.1 | [vlc-data 3.0.7.1-0ubuntu18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-vlc-data-3.0.7.1-0ubuntu18.04.1.md) | Jul 13, 2019 |
| Linux | vlc-l10n Ubuntu 18.04.6 LTS (bionic) | 3.0.7.1-0ubuntu18.04.1 | [vlc-l10n 3.0.7.1-0ubuntu18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-vlc-l10n-3.0.7.1-0ubuntu18.04.1.md) | Jul 13, 2019 |
| Linux | vlc-plugin-access-extra Ubuntu 18.04.6 LTS (bionic) | 3.0.7.1-0ubuntu18.04.1 | [vlc-plugin-access-extra 3.0.7.1-0ubuntu18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-vlc-plugin-access-extra-3.0.7.1-0ubuntu18.04.1.md) | Jul 13, 2019 |
| Linux | vlc-plugin-base Ubuntu 18.04.6 LTS (bionic) | 3.0.7.1-0ubuntu18.04.1 | [vlc-plugin-base 3.0.7.1-0ubuntu18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-vlc-plugin-base-3.0.7.1-0ubuntu18.04.1.md) | Jul 13, 2019 |
| Linux | vlc-plugin-fluidsynth Ubuntu 18.04.6 LTS (bionic) | 3.0.7.1-0ubuntu18.04.1 | [vlc-plugin-fluidsynth 3.0.7.1-0ubuntu18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-vlc-plugin-fluidsynth-3.0.7.1-0ubuntu18.04.1.md) | Jul 13, 2019 |
| Linux | vlc-plugin-jack Ubuntu 18.04.6 LTS (bionic) | 3.0.7.1-0ubuntu18.04.1 | [vlc-plugin-jack 3.0.7.1-0ubuntu18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-vlc-plugin-jack-3.0.7.1-0ubuntu18.04.1.md) | Jul 13, 2019 |
| Linux | vlc-plugin-notify Ubuntu 18.04.6 LTS (bionic) | 3.0.7.1-0ubuntu18.04.1 | [vlc-plugin-notify 3.0.7.1-0ubuntu18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-vlc-plugin-notify-3.0.7.1-0ubuntu18.04.1.md) | Jul 13, 2019 |
| Linux | vlc-plugin-qt Ubuntu 18.04.6 LTS (bionic) | 3.0.7.1-0ubuntu18.04.1 | [vlc-plugin-qt 3.0.7.1-0ubuntu18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-vlc-plugin-qt-3.0.7.1-0ubuntu18.04.1.md) | Jul 13, 2019 |
| Linux | vlc-plugin-samba Ubuntu 18.04.6 LTS (bionic) | 3.0.7.1-0ubuntu18.04.1 | [vlc-plugin-samba 3.0.7.1-0ubuntu18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-vlc-plugin-samba-3.0.7.1-0ubuntu18.04.1.md) | Jul 13, 2019 |
| Linux | vlc-plugin-skins2 Ubuntu 18.04.6 LTS (bionic) | 3.0.7.1-0ubuntu18.04.1 | [vlc-plugin-skins2 3.0.7.1-0ubuntu18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-vlc-plugin-skins2-3.0.7.1-0ubuntu18.04.1.md) | Jul 13, 2019 |
| Linux | vlc-plugin-svg Ubuntu 18.04.6 LTS (bionic) | 3.0.7.1-0ubuntu18.04.1 | [vlc-plugin-svg 3.0.7.1-0ubuntu18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-vlc-plugin-svg-3.0.7.1-0ubuntu18.04.1.md) | Jul 13, 2019 |
| Linux | vlc-plugin-video-output Ubuntu 18.04.6 LTS (bionic) | 3.0.7.1-0ubuntu18.04.1 | [vlc-plugin-video-output 3.0.7.1-0ubuntu18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-vlc-plugin-video-output-3.0.7.1-0ubuntu18.04.1.md) | Jul 13, 2019 |
| Linux | vlc-plugin-video-splitter Ubuntu 18.04.6 LTS (bionic) | 3.0.7.1-0ubuntu18.04.1 | [vlc-plugin-video-splitter 3.0.7.1-0ubuntu18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-vlc-plugin-video-splitter-3.0.7.1-0ubuntu18.04.1.md) | Jul 13, 2019 |
| Linux | vlc-plugin-visualization Ubuntu 18.04.6 LTS (bionic) | 3.0.7.1-0ubuntu18.04.1 | [vlc-plugin-visualization 3.0.7.1-0ubuntu18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-vlc-plugin-visualization-3.0.7.1-0ubuntu18.04.1.md) | Jul 13, 2019 |
| Linux | vlc-plugin-zvbi Ubuntu 18.04.6 LTS (bionic) | 3.0.7.1-0ubuntu18.04.1 | [vlc-plugin-zvbi 3.0.7.1-0ubuntu18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-vlc-plugin-zvbi-3.0.7.1-0ubuntu18.04.1.md) | Jul 13, 2019 |

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