CVE-2018-4878

Adobe Flash Player Use-After-Free

7.8 HIGHActively exploited (CISA KEV)Used in ransomwarePublic exploitEPSS 89.5%

Published6 Feb 2018
Added to CISA KEV3 Nov 2021
Remediation due3 May 2022

Description

A use-after-free vulnerability was discovered in Adobe Flash Player before 28.0.0.161. This vulnerability occurs due to a dangling pointer in the Primetime SDK related to media player handling of listener objects. A successful attack can lead to arbitrary code execution. This was exploited in the wild in January and February 2018.

CVSS 3.1 breakdown

Attack vectorLocal

Attack complexityLow

Privileges requiredNone

User interactionRequired

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

Adobe Flash Player< 28.0.0.161

Redhat Enterprise Linux Desktop6.0

Redhat Enterprise Linux Server6.0

Redhat Enterprise Linux Workstation6.0

Remediation

Fixed in

Adobe Flash Player≥ 28.0.0.161

Patch & vendor advisories

https://helpx.adobe.com/security/products/flash-player/apsb18-03.html

References

http://blog.talosintelligence.com/2018/02/group-123-goes-wild.htmlTechnical DescriptionThird Party Advisory
https://access.redhat.com/errata/RHSA-2018:0285Third Party Advisory
https://blog.morphisec.com/flash-exploit-cve-2018-4878-spotted-in-the-wild-massive-malspam-campaignThird Party Advisory
https://github.com/cisagov/vulnrichment/issues/196Issue Tracking
https://github.com/InQuest/malware-samples/tree/master/CVE-2018-4878-Adobe-Flash-DRM-UAF-0dayThird Party Advisory
https://github.com/vysec/CVE-2018-4878Third Party Advisory
https://helpx.adobe.com/security/products/flash-player/apsb18-03.htmlVendor Advisory
https://securingtomorrow.mcafee.com/mcafee-labs/hackers-bypassed-adobe-flash-protection-mechanism/ExploitThird Party Advisory
https://threatpost.com/adobe-flash-player-zero-day-spotted-in-the-wild/129742/Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-4878Third Party AdvisoryUS Government Resource

and 6 more references

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2018-4878 being actively exploited?

Yes. CVE-2018-4878 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 3 Nov 2021. It has been used in ransomware campaigns.

How severe is CVE-2018-4878?

CVE-2018-4878 has a CVSS 3.1 base score of 7.8, rated high. EPSS estimates a 89.5% probability of exploitation.

Which products are affected by CVE-2018-4878?

Affected products include Adobe Flash Player, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Workstation.

How do I fix CVE-2018-4878?

Upgrade affected software to a fixed version, for example Adobe Flash Player 28.0.0.161 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2018-4878 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.