VulnerabilityModified
CVE-2017-7756
A use-after-free and use-after-scope vulnerability when logging errors from headers for XML HTTP Requests (XHR).
CRITICAL 9.8EPSS 2.63%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.63%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 2.63% probability · 85th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- mozilla/firefox · mozilla/thunderbird · debian/debian linux
- Source
- security@mozilla.org
References
- http://www.securityfocus.com/bid/99057Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1038689Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2017:1440Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1561Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1366595Issue Tracking, Vendor Advisory
- https://www.debian.org/security/2017/dsa-3881Third Party Advisory
- https://www.debian.org/security/2017/dsa-3918Third Party 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/Vendor Advisory
- http://www.securityfocus.com/bid/99057Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1038689Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2017:1440Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1561Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1366595Issue Tracking, Vendor Advisory
- https://www.debian.org/security/2017/dsa-3881Third Party Advisory
- https://www.debian.org/security/2017/dsa-3918Third Party 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/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.