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CVE-2017-5447
CRITICAL
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.
Published: Jun 11, 2018
Modified: Jun 17, 2026
CWE-416
CVSS Metrics
CVSSv3
Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
NONE
Availability Impact:
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Affected Products (18)
| Vendor | Product | Version |
|---|---|---|
| debian | debian_linux | 9.0 |
| redhat | enterprise_linux | 6.0 |
| redhat | enterprise_linux | 7.0 |
| redhat | enterprise_linux_desktop | 6.0 |
| redhat | enterprise_linux_desktop | 7.0 |
| redhat | enterprise_linux_server | 6.0 |
| redhat | enterprise_linux_server | 7.0 |
| redhat | enterprise_linux_server_aus | 7.3 |
| redhat | enterprise_linux_server_aus | 7.4 |
| redhat | enterprise_linux_server_eus | 7.3 |
| redhat | enterprise_linux_server_eus | 7.4 |
| redhat | enterprise_linux_server_eus | 7.5 |
| redhat | enterprise_linux_workstation | 6.0 |
| redhat | enterprise_linux_workstation | 7.0 |
| mozilla | firefox | * < 45.9.0 |
| mozilla | firefox | * < 53.0 |
| mozilla | firefox | 52.0 |
| mozilla | thunderbird | * < 52.1.0 |
GitHub Security Advisory GHSA-qh42-8mfg-rhvw
An out-of-bounds read during the processing of glyph widths during text layout. This results in a...
References (24)
- http://www.securityfocus.com/bid/97940 Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1038320 Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2017:1104 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1106 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1201 Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1343552 Exploit, Issue Tracking, Vendor Advisory
- https://www.debian.org/security/2017/dsa-3831 Third Party Advisory
- https://www.exploit-db.com/exploits/42071/ Exploit, Third Party Advisory, VDB Entry
- https://www.mozilla.org/security/advisories/mfsa2017-10/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2017-11/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2017-12/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2017-13/ Vendor Advisory
- http://www.securityfocus.com/bid/97940 Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1038320 Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2017:1104 Third Party Advisory
Risk Scores
CVSS Score
9.1 / 10
EPSS Score
17.31%
Top 3% most likely to be exploited
Threat Score
41.6 / 100
Data Sources
NVD
EPSS
GitHub