CVE-2017-7758

high-risk
Published 2018-06-11

An out-of-bounds read vulnerability with the Opus encoder when the number of channels in an audio stream changes while the encoder is in use. This vulnerability affects Firefox < 54, Firefox ESR < 52.2, and Thunderbird < 52.2.

Do I need to act?

~
1.7% 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
9
CVSS 9.1/10 Critical
NETWORK / LOW complexity

Affected Products (16)

Affected Vendors

Debian Redhat Mozilla

References (20)

Third Party Advisory http://www.securityfocus.com/bid/99057
Third Party Advisory http://www.securitytracker.com/id/1038689
Third Party Advisory https://access.redhat.com/errata/RHSA-2017:1440
Third Party Advisory https://access.redhat.com/errata/RHSA-2017:1561
Exploit https://bugzilla.mozilla.org/show_bug.cgi?id=1368490
Third Party Advisory https://www.debian.org/security/2017/dsa-3881
Third Party Advisory https://www.debian.org/security/2017/dsa-3918
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2017-15/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2017-16/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2017-17/
Third Party Advisory http://www.securityfocus.com/bid/99057
Third Party Advisory http://www.securitytracker.com/id/1038689
Third Party Advisory https://access.redhat.com/errata/RHSA-2017:1440
Third Party Advisory https://access.redhat.com/errata/RHSA-2017:1561
Exploit https://bugzilla.mozilla.org/show_bug.cgi?id=1368490
Third Party Advisory https://www.debian.org/security/2017/dsa-3881
Third Party Advisory https://www.debian.org/security/2017/dsa-3918
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2017-15/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2017-16/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2017-17/
53
/ 100
high-risk
Severity 31/34 · Critical
Exploitability 4/34 · Minimal
Exposure 18/34 · Moderate