Assessment
Why it matters
CISA lists this vulnerability as known to be exploited; exploitation is confirmed; EPSS is 87.4%; technical severity is CVSS 7.5.
A use-after-free vulnerability in SVG Animation has been discovered. An exploit built on this vulnerability has been discovered in the wild targeting Firefox and Tor Browser users on Windows. This vulnerability affects Firefox < 50.0.2, Firefox ESR < 45.5.1, and Thunderbird < 45.5.1.
Who should care
- Teams operating Debian Linux, Firefox, Firefox, Firefox ESR, and Thunderbird +8 more
- Vulnerability and exposure management teams
- Security operations teams monitoring exploitation activity
Response plan
What I would do
- Confirm whether Debian Linux, Firefox, Firefox, Firefox ESR, and Thunderbird +8 more is present in the environment.
- Identify affected versions and establish whether vulnerable services are exposed or reachable.
- Mozilla Security advisory Show Bug.cgi
- Review relevant security telemetry for evidence of attempted or successful exploitation.
- Document the remediation decision and track it to verified completion.
Treatment intelligence
Remediation intelligence
Vendor sources are listed before government and third-party guidance. Confirm product applicability and change prerequisites before deployment.
Verification noteAutomated link verification has not completed for this guidance yet.
Advisory
Technical details
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- CWE
- CWE-416
- Affected versions
- Debian Debian Linux (Version 9.0); Mozilla Firefox (End Excluding 50.0.2 | End Excluding 45.5.1); Mozilla Firefox, Firefox ESR, and Thunderbird; Mozilla Thunderbird (End Excluding 45.5.1); Redhat Enterprise Linux (Version 5.0 | Version 6.0 | Version 7.0); Redhat Enterprise Linux Desktop (Version 5.0 | Version 6.0 | Version 7.0); Redhat Enterprise Linux Server (Version 5.0 | Version 6.0 | Version 7.0); Redhat Enterprise Linux Server Aus (Version 7.3 | Version 7.4)
- Fixed versions
- Mozilla Firefox (Fixed from 50.0.2, 45.5.1); Mozilla Thunderbird (Fixed from 45.5.1)
- Published
- 11 June 2018
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
Signal timeline
- CVE published
- Added to CISA KEV
- Latest EPSS score: 87.4%
- Signal calculated at 81
External references
- Red Hat Third-party advisory RHSA 2016 2843
- Red Hat Third-party advisory RHSA 2016 2850
- CISA Government advisory CVE-2016-9079
- Securityfocus Third-party advisory
- Securitytracker Third-party advisory 1037370
- Security Gentoo Third-party advisory 201701 15
- Security Gentoo Third-party advisory 201701 35
- Exploit information from www.exploit-db.com
- Exploit information from www.exploit-db.com