CVE-2017-5448

high-risk
Published 2018-06-11

An out-of-bounds write in "ClearKeyDecryptor" while decrypting some Clearkey-encrypted media content. The "ClearKeyDecryptor" code runs within the Gecko Media Plugin (GMP) sandbox. If a second mechanism is found to escape the sandbox, this vulnerability allows for the writing of arbitrary data within memory, resulting in a potentially exploitable crash. This vulnerability affects Firefox ESR < 45.9, Firefox ESR < 52.1, and Firefox < 53.

Do I need to act?

~
1.4% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.6/10 High
NETWORK / LOW complexity

Affected Products (15)

Affected Vendors

Debian Redhat Mozilla

References (18)

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
Issue Tracking https://bugzilla.mozilla.org/show_bug.cgi?id=1346648
Third Party Advisory https://www.debian.org/security/2017/dsa-3831
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/
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
Issue Tracking https://bugzilla.mozilla.org/show_bug.cgi?id=1346648
Third Party Advisory https://www.debian.org/security/2017/dsa-3831
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/
51
/ 100
high-risk
Severity 29/34 · Critical
Exploitability 4/34 · Minimal
Exposure 18/34 · Moderate