SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityAnalyzed

CVE-2015-5123

Adobe Flash Player Use-After-Free Vulnerability

KEVCRITICAL 9.8EPSS 18.5%

Does this matter?

Known to be exploited in the wild (CISA KEV, CISA remediation deadline 4 May 2022). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.

Description

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.

CVSS 3.1
9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
18.49% probability · 97th percentile
CISA KEV
Listed 13 April 2022 · due 4 May 2022
Weakness
CWE-416
Affected
redhat/enterprise linux desktop · redhat/enterprise linux server · redhat/enterprise linux server eus · redhat/enterprise linux workstation · opensuse/evergreen · suse/linux enterprise desktop · suse/linux enterprise workstation extension · adobe/flash player · adobe/flash player desktop runtime
Source
psirt@adobe.com

CISA notes

The impacted product is end-of-life and should be disconnected if still in use. https://nvd.nist.gov/vuln/detail/CVE-2015-5123

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.