Assessment
Why it matters
CISA lists this vulnerability as known to be exploited; exploitation is confirmed; EPSS is 93.7%; technical severity is CVSS 9.8.
Use-after-free vulnerability in the DisplayObject class in the ActionScript 3 (AS3) implementation in Adobe Flash Player 13.x through 13.0.0.302 on Windows and OS X, 14.x through 18.0.0.203 on Windows and OS X, 11.x through 11.2.202.481 on Linux, and 12.x through 18.0.0.204 on Linux Chrome installations allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via crafted Flash content that leverages improper handling of the opaqueBackground property, as exploited in the wild in July 2015.
Who should care
- Teams operating Flash Player, Flash Player Desktop Runtime, Evergreen +6 more
- Vulnerability and exposure management teams
- Security operations teams monitoring exploitation activity
Response plan
What I would do
- Confirm whether Flash Player, Flash Player Desktop Runtime, Evergreen +6 more is present in the environment.
- Identify affected versions and establish whether vulnerable services are exposed or reachable.
- The impacted product is end-of-life and should be disconnected if still in use.
- Review relevant security telemetry for evidence of attempted or successful exploitation.
- Document the remediation decision and track it to verified completion.
Vendor remediation
Patch and remediation links
Use the vendor source below to confirm the correct fixed version, package or mitigation for your affected product.
Technical details
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CWE
- CWE-416
- Affected versions
- Adobe Flash Player (Start Including: 11.0, End Including: 11.2.202.481); Adobe Flash Player Desktop Runtime (Start Including: 18.0, End Including: 18.0.0.203); Opensuse Evergreen (Version: 11.4); Redhat Enterprise Linux Desktop (Version: 6.0); Redhat Enterprise Linux Server (Version: 6.0); Redhat Enterprise Linux Server Eus (Version: 6.6); Redhat Enterprise Linux Workstation (Version: 6.0); Suse Linux Enterprise Desktop (Version: 12)
- Published
- 14 July 2015
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
Signal timeline
- CVE published
- Added to CISA KEV
- Latest EPSS score: 93.7%
- Signal calculated at 84
External references
- Technical reference from github.com
- Government advisory from www.cisa.gov
- Third-party advisory from lists.opensuse.org
- Third-party advisory from lists.opensuse.org
- Third-party advisory from lists.opensuse.org
- Third-party advisory from marc.info
- Exploit information from packetstormsecurity.com
- Third-party advisory from rhn.redhat.com
- Government advisory from www.kb.cert.org
- Third-party advisory from www.rapid7.com
- Third-party advisory from www.securityfocus.com
- Third-party advisory from www.securitytracker.com