What is CVE-2015-5123?

CVE-2015-5123 is a critical-severity vulnerability in Adobe Flash Player, classified under Use After Free. CVSS score: 9.8/10. Published 2015-07-14.

How severe is CVE-2015-5123?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2015-5123 known to be exploited?

Yes. CVE-2015-5123 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-04-13), indicating it is being actively exploited. 3 public proof-of-concept repositories are indexed.

Use After Free in Adobe Flash Player

CVE-2015-5123

Use-after-free vulnerability in the BitmapData 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 overrides a valueOf function, as exploited in the wild in July 2015.

Vulnerability class: Use-After-Free

EPSS: 0.185 (97.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Adobe Flash_player
Adobe Flash_player_desktop_runtime
Apple Macos
Linux Linux_kernel
Microsoft Windows
Opensuse Evergreen — versions 11.4
Redhat Enterprise_linux_desktop — versions 5.0, 6.0
Redhat Enterprise_linux_server — versions 5.0, 6.0
Redhat Enterprise_linux_server_eus — versions 6.6
Redhat Enterprise_linux_workstation — versions 5.0, 6.0

Weakness classification (CWE)

CWE-416 — Use After Free

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2022-04-13. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-05-04.

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

Public proof-of-concept exploits

References

psirt@adobe.com (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_SECTRACK, Broken Link)
psirt@adobe.com (vendor-advisory, Mailing List, Third Party Advisory, x_refsource_SUSE)
psirt@adobe.com (Third Party Advisory, x_refsource_MISC, Broken Link)
psirt@adobe.com (x_refsource_HP, vendor-advisory, Mailing List, Third Party Advisory)
psirt@adobe.com (US Government Resource, Third Party Advisory, x_refsource_CERT, third-party-advisory)
psirt@adobe.com (x_refsource_CONFIRM, Broken Link, Vendor Advisory)
psirt@adobe.com (US Government Resource, x_refsource_CERT-VN, Third Party Advisory, third-party-advisory)
psirt@adobe.com (vendor-advisory, Mailing List, Third Party Advisory, x_refsource_SUSE)
psirt@adobe.com (vendor-advisory, Third Party Advisory, x_refsource_GENTOO)
psirt@adobe.com (x_refsource_HP, vendor-advisory, Third Party Advisory, Broken Link)

Frequently asked questions

What is CVE-2015-5123?: CVE-2015-5123 is a critical-severity vulnerability in Adobe Flash Player, classified under Use After Free. CVSS score: 9.8/10. Published 2015-07-14.
How severe is CVE-2015-5123?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2015-5123 known to be exploited?: Yes. CVE-2015-5123 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-04-13), indicating it is being actively exploited. 3 public proof-of-concept repositories are indexed.