CVE-2017-7756
9.8
CRITICAL · CVSS 3.0 · EPSS 2.6% (pctl 85)
In your normal cycle
Critical by CVSS (9.8), but no sign of active exploitation.
Description
A use-after-free and use-after-scope vulnerability when logging errors from headers for XML HTTP Requests (XHR). This could result in a potentially exploitable crash. This vulnerability affects Firefox < 54, Firefox ESR < 52.2, and Thunderbird < 52.2.
Scoring
| CVSS | 9.8 (CRITICAL, v3.0) |
|---|---|
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 2.63% — more likely to be exploited than 85% of all CVEs |
| Weakness | CWE-416 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2018-06-11 |
| Last modified | 2026-06-17 |
Affected (3)
| Vendor | Product |
|---|---|
| debian | debian linux |
| mozilla | firefox |
| mozilla | thunderbird |
References
- http://www.securityfocus.com/bid/99057
- http://www.securitytracker.com/id/1038689
- https://access.redhat.com/errata/RHSA-2017:1440
- https://access.redhat.com/errata/RHSA-2017:1561
- https://bugzilla.mozilla.org/show_bug.cgi?id=1366595
- https://www.debian.org/security/2017/dsa-3881
- https://www.debian.org/security/2017/dsa-3918
- https://www.mozilla.org/security/advisories/mfsa2017-15/
- https://www.mozilla.org/security/advisories/mfsa2017-16/
- https://www.mozilla.org/security/advisories/mfsa2017-17/
- http://www.securityfocus.com/bid/99057
- http://www.securitytracker.com/id/1038689
- https://access.redhat.com/errata/RHSA-2017:1440
- https://access.redhat.com/errata/RHSA-2017:1561
- https://bugzilla.mozilla.org/show_bug.cgi?id=1366595
- https://www.debian.org/security/2017/dsa-3881
- https://www.debian.org/security/2017/dsa-3918
- https://www.mozilla.org/security/advisories/mfsa2017-15/
- https://www.mozilla.org/security/advisories/mfsa2017-16/
- https://www.mozilla.org/security/advisories/mfsa2017-17/
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