CVE-2018-18500

Advisory lineage Upstream: 0 Downstream: 23
Modified
Published: 05 Feb 2019, 21:00
Last modified:05 Aug 2024, 11:08

Vulnerability Summary

Overall Risk (default)
high
70/100
CVSS Score
9.8 CRITICAL
v3.0 (nvd)
EPSS Score
35.41% HIGH
35% probability +7.18%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

05 Feb 2019, 21:00
Published
Vulnerability first disclosed
05 Aug 2024, 11:08
Last Modified
Vulnerability information updated

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 Metrics

  • v3.0•CRITICAL•Score: 9.8CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  • v2.0•HIGH•Score: 7.5AV:N/AC:L/Au:N/C:P/I:P/A:P

EPSS Trends

Current EPSS score: 35.41%• Percentile: 97%

Techniques & Countermeasures

  • CWE-416•Use After Free

    The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected Systems

  • canonical•ubuntu_linux

    14.04 | 16.04 | 18.04 | 18.10

  • debian•debian_linux

    8.0 | 9.0

  • Unknown•Firefox

    < 65.0

  • mozilla•firefox_esr

    < 60.5

  • mozilla•thunderbird

    < 60.5

  • redhat•enterprise_linux_desktop

    6.0 | 7.0

  • redhat•enterprise_linux_server

    6.0 | 7.0

  • redhat•enterprise_linux_server_aus

    7.6

  • redhat•enterprise_linux_server_eus

    7.6

  • redhat•enterprise_linux_server_tus

    7.6

  • redhat•enterprise_linux_workstation

    6.0 | 7.0

References (17)