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CVE-2018-19857: Videolan Vlc Media Player: Information disclosure

CVE-2018-19857 is rated critical with a CVSS v3.0 base score of 9.1 and affects Videolan Vlc Media Player, along with 1 other product in NVD’s configuration data. Per its scoring, it can be exploited over the network, without authentication, without any user interaction.

Vulnerability 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.

Severity breakdown

CVSS v3.0 9.1: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

  • Attack vector: Network. Exploitable remotely over the network, with no need for local or physical access.
  • Attack complexity: Low. No special conditions; the attack can be repeated reliably.
  • Privileges required: None. No account or prior access is needed.
  • User interaction: None. No action from any user is needed.
  • Scope: Unchanged. Impact stays within the vulnerable component.
  • Confidentiality impact: High. Total loss of confidentiality; sensitive data can be fully disclosed.
  • Integrity impact: None. No loss of integrity.
  • Availability impact: High. Total loss of availability; the component can be shut down.

Underlying weakness

CWE-824: Access of Uninitialized Pointer

The product accesses or uses a pointer that has not been initialized.

Affected products

  • Videolan Vlc Media Player: 3.0.4
  • Debian Linux: 9.0

References