CVE-2017-5447
Mozilla: Out-of-bounds read during glyph processing (MFSA 2017-11, MFSA 2017-12)
Severity
ImportantRed Hat Product Security
CVSS 3.0
Review impact separately from score.
Published · April 19, 2017
Updated · November 21, 2025
Description
An out-of-bounds read during the processing of glyph widths during text layout. This results in a potentially exploitable crash and could allow an attacker to read otherwise inaccessible memory. This vulnerability affects Thunderbird < 52.1, Firefox ESR < 45.9, Firefox ESR < 52.1, and Firefox < 53.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.0 · 9.1CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
CWE not specified