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CVE-2018-5156

CRITICAL

A vulnerability can occur when capturing a media stream when the media source type is changed as the capture is occurring. This can result in stream data being cast to the wrong type causing a potentially exploitable crash. This vulnerability affects Thunderbird < 60, Firefox ESR < 60.1, Firefox ESR < 52.9, and Firefox < 61.

Published: Oct 18, 2018 Modified: Jun 17, 2026
CWE-20

CVSS Metrics

CVSSv3
Attack Vector: NETWORK Attack Complexity: LOW Privileges Required: NONE User Interaction: NONE Scope: UNCHANGED Confidentiality Impact: HIGH Integrity Impact: HIGH Availability Impact: HIGH

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

Affected Products (20)

Vendor Product Version
redhat enterprise_linux_desktop 6.0
redhat enterprise_linux_desktop 7.0
redhat enterprise_linux_server 6.0
redhat enterprise_linux_server 7.0
redhat enterprise_linux_server_aus 7.6
redhat enterprise_linux_server_eus 7.5
redhat enterprise_linux_server_eus 7.6
redhat enterprise_linux_server_tus 7.6
redhat enterprise_linux_workstation 6.0
redhat enterprise_linux_workstation 7.0
debian debian_linux 8.0
debian debian_linux 9.0
canonical ubuntu_linux 14.04
canonical ubuntu_linux 16.04
canonical ubuntu_linux 17.10
canonical ubuntu_linux 18.04
mozilla firefox * < 52.9.0
mozilla firefox * < 61.0
mozilla firefox * ≥ 52.9.1 < 60.1.0
mozilla thunderbird * < 60.0

GitHub Security Advisory GHSA-x98g-g264-xxpx

A vulnerability can occur when capturing a media stream when the media source type is changed as...

Risk Scores

CVSS Score 9.8 / 10
EPSS Score 3.76%

Top 11% most likely to be exploited

Threat Score 40.3 / 100

Data Sources

NVD EPSS GitHub