Assessment
Why it matters
CISA lists this vulnerability as known to be exploited; exploitation is confirmed; EPSS is 85.2%; technical severity is CVSS 8.8.
Use-after-free vulnerability in Microsoft Internet Explorer 9 and 10 allows remote attackers to execute arbitrary code via vectors involving crafted JavaScript code, CMarkup, and the onpropertychange attribute of a script element, as exploited in the wild in January and February 2014.
Who should care
- Teams operating Internet Explorer
- Vulnerability and exposure management teams
- Security operations teams monitoring exploitation activity
Response plan
What I would do
- Confirm whether Internet Explorer is present in the environment.
- Identify affected versions and establish whether vulnerable services are exposed or reachable.
- Microsoft Security patch 2934088
- 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.
Patch
Technical details
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CWE
- CWE-416
- Affected versions
- Microsoft Internet Explorer (Version 9 | Version 10)
- Fixed versions
- No explicit fixed version is currently recorded.
- Published
- 14 February 2014
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
Signal timeline
- CVE published
- Added to CISA KEV
- Latest EPSS score: 85.2%
- Signal calculated at 82
External references
- CERT/CC Government advisory 732479
- CISA Government advisory CVE-2014-0322
- Community Websense Exploit information CVE-2014-0322
- Twitter Technical reference 434251658344673281
- Exploit information from www.exploit-db.com
- Exploit information from www.exploit-db.com
- Fireeye Exploit information New Ie Zero Day Found In Watering Hole Attack 2
- Fireeye Technical reference
- Osvdb Technical reference 103354
- Exploit information from www.dropbox.com