Quantum Secular Labs / Blog / Advisories
CVE-2018-5156: Mozilla Firefox: Denial of service
CVE-2018-5156 is rated critical with a CVSS v3.0 base score of 9.8 and affects Mozilla Firefox, along with 8 other products in NVD’s configuration data. Per its scoring, it can be exploited over the network, without authentication, without any user interaction. The scored impact on confidentiality, integrity and availability is the highest available.
Vulnerability description
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.
Severity breakdown
CVSS v3.0 9.8: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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: High. Total loss of integrity; data or system state can be fully modified.
- Availability impact: High. Total loss of availability; the component can be shut down.
Underlying weakness
CWE-20: Improper Input Validation
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
Affected products
- Mozilla Firefox: before 52.9.0; before 61.0; from 52.9.1 before 60.1.0
- Mozilla Thunderbird: before 60.0
- Red Hat Enterprise Linux Desktop: 6.0; 7.0
- Red Hat Enterprise Linux Server: 6.0; 7.0
- Red Hat Enterprise Linux Server Aus: 7.6
- Red Hat Enterprise Linux Server Eus: 7.5; 7.6
- Red Hat Enterprise Linux Server Tus: 7.6
- Red Hat Enterprise Linux Workstation: 6.0; 7.0
- Debian Linux: 8.0; 9.0
- Canonical Ubuntu Linux: 14.04; 16.04; 17.10; 18.04
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1453127
- https://www.mozilla.org/security/advisories/mfsa2018-15/
- https://www.mozilla.org/security/advisories/mfsa2018-16/
- https://www.mozilla.org/security/advisories/mfsa2018-17/
- https://www.mozilla.org/security/advisories/mfsa2018-19/
- http://www.securityfocus.com/bid/104560
- http://www.securitytracker.com/id/1041193
- https://access.redhat.com/errata/RHSA-2018:2112
- https://access.redhat.com/errata/RHSA-2018:2113
- https://lists.debian.org/debian-lts-announce/2018/06/msg00014.html
- https://lists.debian.org/debian-lts-announce/2018/11/msg00011.html
- https://security.gentoo.org/glsa/201810-01
- https://security.gentoo.org/glsa/201811-13
- https://usn.ubuntu.com/3705-1/