Adobe Flash Player Integer Underflow Vulnerablity

Integer underflow in Adobe Flash Player before 11.7.700.261 and 11.8.x through 12.0.x before 12.0.0.44 on Windows and Mac OS X, and before 11.2.202.336 on Linux, allows remote attackers to execute arbitrary code via unspecified vectors.

CheckOps priority index

8.9/10 Patch within 24 h

Severity8.8

Probability10.0

Exploitation4/5

Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.

EPSS · today 99.9% higher than 99.97% of CVEs

CVSS 3.1 8.8 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:

Exploited for 777 days 17 Sept 2024

CISA due date 08 Oct 2024 for US federal agencies

Exploitation probability EPSS · FIRST

EPSS probability (%)Percentile among all CVEs

Exploitation signals 4 / 5

KEV catalog (CISA)17 Sept 2024
Exploited in EUVD (ENISA)17 Sept 2024
Used by ransomwareno
EPSS above 10 %99.9%
No account, over the networkyes

What to do

Fix

Apply the vendor’s fix as soon as it is available.

CISA guidance: The impacted product is end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue utilization of the product.

Meanwhile

Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.

Manufacturers (CRA)

Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained

Affected products

Flash Player

Weaknesses (CWE)

CWE-191

Open source packages OSV

Affected libraries according to OSV, with fixed versions.

Timeline

05 Feb 2014
Published
17 Sept 2024
Exploitation reported (ENISA)
17 Sept 2024
Added to the KEV catalog
08 Oct 2024
CISA remediation due date
26 Sept 2026
EPSS peak: 99.9%

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