CVE-2017-5447 describes an out-of-bounds read vulnerability in Mozilla Firefox and Thunderbird, specifically affecting versions prior to Firefox 53, Firefox ESR 52.1, and Thunderbird 52.1. This flaw occurs during text layout when processing glyph widths, leading to a potentially exploitable crash and the ability to read inaccessible memory. Rated Critical with a CVSS score of 9.1, this vulnerability is network-exploitable with low attack complexity, allowing for high confidentiality impact (reading sensitive data) and high availability impact (denial of service). While not listed on the KEV catalog or Hot List, an ExploitDB entry (EDB-42071) exists, though there is no evidence of active exploitation, Metasploit/Nuclei modules, or significant community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
9.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | ||
6.0CPE matchmatch criteria | cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* | ||
7.0CPE matchmatch criteria | cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* | ||
6.0CPE matchmatch criteria | cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:* | ||
7.0CPE matchmatch criteria | cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.