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Critical severity · published Feb 5, 2019
CVE-2018-18500
A use-after-free vulnerability can occur while parsing an HTML5 stream in concert with custom HTML elements
9.8
CVSS
12.7%
EPSS
No
On KEV
Description
A use-after-free vulnerability can occur while parsing an HTML5 stream in concert with custom HTML elements. This results in the stream parser object being freed while still in use, leading to a potentially exploitable crash. This vulnerability affects Thunderbird < 60.5, Firefox ESR < 60.5, and Firefox < 65.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)12.7% · higher than 96% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
Firefox · Mozilla
before 65.0 · source: NVD
DL
Debian Linux · Debian
8.0; 9.0 · source: NVD
EL
Enterprise Linux Desktop · Redhat
6.0; 7.0 · source: NVD
EL
Enterprise Linux Server · Redhat
6.0; 7.0 · source: NVD
EL
Enterprise Linux Server Aus · Redhat
7.6 · source: NVD
EL
Enterprise Linux Server Eus · Redhat
7.6 · source: NVD
EL
Enterprise Linux Server Tus · Redhat
7.6 · source: NVD
EL
Enterprise Linux Workstation · Redhat
6.0; 7.0 · source: NVD
FE
Firefox Esr · Mozilla
before 60.5 · source: NVD
TH
Thunderbird · Mozilla
before 60.5 · source: NVD
UL
Ubuntu Linux · Canonical
14.04; 16.04; 18.04; 18.10 · source: NVD
Affected product
FI
Firefox
Mozilla
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-18500
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-18500
lists.opensuse.org
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00021.html
Third Party Advisory
http://www.securityfocus.com/bid/106781
Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:0218
Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:0219
Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:0269
Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:0270
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