Home/CVE/Adobe Flash Player Use-After-Free Vulnerability
CVE

CVE-2016-7855

Adobe Flash Player Use-After-Free Vulnerability

Use-after-free vulnerability in Adobe Flash Player before 23.0.0.205 on Windows and OS X and before 11.2.202.643 on Linux allows remote attackers to execute arbitrary code via unspecified vectors, as exploited in the wild in October 2016.

HIGH · CVSS 8.8 ⚠ CISA KEV EPSS 0.58965
Act now
  • Listed on CISA KEV (known exploited in the wild)
  • SSVC exploitation status: active
  • EPSS ≥ 0.50 - high probability of exploitation in the next 30 days
  • EPSS percentile: top 2% of all CVEs by exploitation likelihood
  • CVSS base score ≥ 7.0
Sigma rules8 YARA rules0
⬢

Required Remediation

The impacted product is end-of-life and should be disconnected if still in use.

◆

Threat Actors Linked

1
actorStrongPity / Promethium
⬡

Weakness Classification

CWE-416Use After Free
CWE-416Use After Free
▤

Affected Products & Versions

5
adobe flash player<= 23.0.0.185
adobe flash player<= 11.2.202.637
redhat enterprise linux desktopall versions
redhat enterprise linux serverall versions
redhat enterprise linux workstationall versions
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Sigma Hunt Rules

8
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighFlash Player Update from Suspicious Location
productcriticalHackTool - Windows Credential Editor (WCE) Execution
productcriticalWindows Credential Editor Registry
producthighOpenCanary - MSSQL Login Attempt Via Windows Authentication
producthighWindows LAPS Credential Dump From Entra ID
producthighTamper Windows Defender - PSClassic
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Scoring & Timeline

8.8
HIGH · CVSS v3.1 · psirt@adobe.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD01 Nov 2016 · 10:59 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
active
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

3
cisaKEV-CVE-2016-7855
rhsaRHSA-2016:2119Critical
suse-csafSUSE-SU-2016:2662-1
🔗

References & Sources

8
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://rhn.redhat.com/errata/RHSA-2016-2119.htmlThird Party Advisory
http://www.securityfocus.com/bid/93861Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1037111Third Party AdvisoryVDB Entry
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-128PatchVendor Advisory
https://helpx.adobe.com/security/products/flash-player/apsb16-36.htmlPatchVendor Advisory
https://security.gentoo.org/glsa/201610-10Third Party Advisory
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