Out-of-bounds Read in Mozilla Firefox
CVE-2017-7758
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.
EPSS exploit prediction
EPSS: 0.031 (87.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.031 · newest: 0.031 · change: 0.000
Affected products
- Mozilla Firefox — versions unspecified
- Mozilla Firefox Esr — versions unspecified
- Mozilla Thunderbird — versions unspecified
- Debian Linux — versions 8.0, 9.0
- Red Hat Enterprise Linux Desktop — versions 6.0, 7.0
- Red Hat Enterprise Linux Server — versions 6.0, 7.0
- Red Hat Enterprise Linux Server Aus — versions 7.3, 7.4
- Red Hat Enterprise Linux Server Eus — versions 7.2, 7.3, 7.4
- Red Hat Enterprise Linux Workstation — versions 6.0, 7.0
Weakness classification (CWE)
References
- www.securityfocus.com/bid/99057 (VDB Entry, Third Party Advisory, vdb-entry)
- www.mozilla.org/security/advisories/mfsa2017-15/ (Vendor Advisory)
- www.debian.org/security/2017/dsa-3918 (vendor-advisory, Third Party Advisory)
- www.securitytracker.com/id/1038689 (VDB Entry, Third Party Advisory, vdb-entry)
- www.debian.org/security/2017/dsa-3881 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:1440 (vendor-advisory, Third Party Advisory)
- bugzilla.mozilla.org/show_bug.cgi (Exploit, Patch, Issue Tracking)
- access.redhat.com/errata/RHSA-2017:1561 (vendor-advisory, Third Party Advisory)
- www.mozilla.org/security/advisories/mfsa2017-17/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2017-16/ (Vendor Advisory)
Frequently asked questions
- What is CVE-2017-7758?
- CVE-2017-7758 is a critical-severity vulnerability in Mozilla Firefox, classified under Out-of-bounds Read. CVSS score: 9.1/10. Published 2018-06-11.
- How severe is CVE-2017-7758?
- Critical severity. CVSS v3 base score is 9.1 out of 10.