Background exploitation KEV catalog No authentication

CVE-2017-8543

Microsoft Windows Search Remote Code Execution Vulnerability

CheckOps priority index

8.5/10 Patch within 24 h

Severity9.8

Probability7.4

Exploitation4/5

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

EPSS · today 74.2% −0.2 pts in 7 days

CVSS 3.1 9.8 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:

Exploited for 1,624 days 24 May 2022

CISA due date 14 Jun 2022 for US federal agencies

Exploitation probability EPSS · FIRST

EPSS probability (%)Percentile among all CVEs

Exploitation signals 4 / 5

KEV catalog (CISA)24 May 2022
Exploited in EUVD (ENISA)24 May 2022
Used by ransomwareno
EPSS above 10 %74.2%
No account, over the networkyes

What to do

Fix

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

CISA guidance: Apply updates per vendor instructions.

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

Description ENISA EUVD

Microsoft Windows XP SP3, Windows XP x64 XP2, Windows Server 2003 SP2, Windows Vista, Windows 7 SP1, Windows Server 2008 SP2 and R2 SP1, Windows 8, Windows 8.1 and Windows RT 8.1, Windows Server 2012 and R2, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016 allow an attacker to take control of the affected system when Windows Search fails to handle objects in memory, aka "Windows Search Remote Code Execution Vulnerability".

Affected products

Microsoft WindowsWindows

Affected versions

Microsoft Windows XP SP3, Windows XP x64 XP2, Windows Server 2003 SP2, Windows Vista, Windows 7 SP1, Windows Server 2008 SP2 and R2 SP1, Windows 8, Windows 8.1 and Windows RT 8.1, Windows Server 2012 and R2, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016.

Weaknesses (CWE)

CWE-281

Open source packages OSV

Affected libraries according to OSV, with fixed versions.

Timeline

15 Jun 2017
Published
24 May 2022
Exploitation reported (ENISA)
24 May 2022
Added to the KEV catalog
14 Jun 2022
CISA remediation due date
20 Oct 2026
EPSS peak: 74.4%

References

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