CVE-2017-5447

critical-risk
Published 2018-06-11

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.

Do I need to act?

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17.1% chance of exploitation in next 30 days
EPSS score — higher than 83% of all CVEs
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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1 public exploit available
42071
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.1/10 Critical
NETWORK / LOW complexity

Affected Products (17)

Affected Vendors

Debian Redhat Mozilla

References (24)

Third Party Advisory http://www.securityfocus.com/bid/97940
Third Party Advisory http://www.securitytracker.com/id/1038320
Third Party Advisory 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
Exploit https://bugzilla.mozilla.org/show_bug.cgi?id=1343552
Third Party Advisory https://www.debian.org/security/2017/dsa-3831
Exploit https://www.exploit-db.com/exploits/42071/
Vendor Advisory 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/
Third Party Advisory http://www.securityfocus.com/bid/97940
Third Party Advisory http://www.securitytracker.com/id/1038320
Third Party Advisory 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
Exploit https://bugzilla.mozilla.org/show_bug.cgi?id=1343552
Third Party Advisory https://www.debian.org/security/2017/dsa-3831
Exploit https://www.exploit-db.com/exploits/42071/
and 4 more references
70
/ 100
critical-risk
Severity 31/34 · Critical
Exploitability 20/34 · Moderate
Exposure 19/34 · Moderate