CVE-2017-5447

Publication date 20 April 2017

Last updated 25 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

9.1 · Critical

Score breakdown

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.

Status

Package Ubuntu Release Status
thunderbird 17.04 zesty
Fixed 1:52.1.1+build1-0ubuntu0.17.04.1
16.10 yakkety
Fixed 1:52.1.1+build1-0ubuntu0.16.10.1
16.04 LTS xenial
Fixed 1:52.1.1+build1-0ubuntu0.16.04.1
14.04 LTS trusty
Fixed 1:52.1.1+build1-0ubuntu0.14.04.1
12.04 LTS precise Ignored end of life
firefox 17.04 zesty
Fixed 53.0+build6-0ubuntu0.17.04.1
16.10 yakkety
Fixed 53.0+build6-0ubuntu0.16.10.1
16.04 LTS xenial
Fixed 53.0+build6-0ubuntu0.16.04.1
14.04 LTS trusty
Fixed 53.0+build6-0ubuntu0.14.04.1
12.04 LTS precise Ignored

Severity score breakdown

Parameter Value
Base score 9.1 · Critical
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

References

Related Ubuntu Security Notices (USN)

    • USN-3278-1
    • Thunderbird vulnerabilities
    • 16 May 2017
    • USN-3260-1
    • Firefox vulnerabilities
    • 21 April 2017

Other references