What’s Vulnerable › Vulnerabilities
CVE-2017-7828
- Severity: critical (CVSS 9.8 v3.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 7.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2018-06-11 · updated 2026-06-17
- Weakness: CWE-416
Description
A use-after-free vulnerability can occur when flushing and resizing layout because the "PressShell" object has been freed while still in use. This results in a potentially exploitable crash during these operations. This vulnerability affects Firefox < 57, Firefox ESR < 52.5, and Thunderbird < 52.5.
Affected products
- Debian Linux: 7.0, 8.0, 9.0
- Mozilla Firefox: before 57.0; before 52.5.0 — fixed in 52.5.0, 57.0
- Mozilla Thunderbird: before 52.5.0 — fixed in 52.5.0
- RedHat Enterprise Linux Desktop: 6.0, 7.0
- RedHat Enterprise Linux Server: 6.0, 7.0
- RedHat Enterprise Linux Server Aus: 7.4
- RedHat Enterprise Linux Server Eus: 7.4, 7.5
- RedHat Enterprise Linux Workstation: 6.0, 7.0
How to fix
Upgrade to a fixed version: Mozilla Firefox 52.5.0, 57.0; Mozilla Thunderbird 52.5.0. Check the vendor advisory for mitigations.
References
- http://www.securityfocus.com/bid/101832
- http://www.securitytracker.com/id/1039803
- https://access.redhat.com/errata/RHSA-2017:3247
- https://access.redhat.com/errata/RHSA-2017:3372
- https://bugzilla.mozilla.org/show_bug.cgi?id=1406750
- https://bugzilla.mozilla.org/show_bug.cgi?id=1412252
- https://lists.debian.org/debian-lts-announce/2017/11/msg00018.html
- https://lists.debian.org/debian-lts-announce/2017/12/msg00001.html
- https://www.debian.org/security/2017/dsa-4035
- https://www.debian.org/security/2017/dsa-4061
- https://www.debian.org/security/2017/dsa-4075
- https://www.mozilla.org/security/advisories/mfsa2017-24/
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