Is CVE-2020-15166 in the CISA KEV catalog?

No. CVE-2020-15166 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-15166?

CVE-2020-15166 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2020-15166?

CVE-2020-15166 has an EPSS score of 3.41% (87th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-15166?

Upgrade zeromq3 on debian 11 to 4.3.3-1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2020-15166

HIGHEPSS 87th pctl

7.5

CVSS v3

NVD

Description

In ZeroMQ before version 4.3.3, there is a denial-of-service vulnerability. Users with TCP transport public endpoints, even with CURVE/ZAP enabled, are impacted. If a raw TCP socket is opened and connected to an endpoint that is fully configured with CURVE/ZAP, legitimate clients will not be able to exchange any message. Handshakes complete successfully, and messages are delivered to the library, but the server application never receives them. This is patched in version 4.3.3.

CWE-400Resource Exhaustion

How to fix

Remediation Available

zeromq3Debian

Fixed in:4.3.3-1CVE-2020-15166

libzmq3Ubuntu

Fixed in:4.0.4+dfsg-2ubuntu0.1+esm3USN-4920-1

libzmq5Ubuntu

Fixed in:4.1.4-7ubuntu0.1+esm2USN-4920-1

Fixed in:4.2.5-1ubuntu0.2+esm2USN-4920-1

Fixed in:4.3.2-2ubuntu1.20.04.1~esm2USN-4920-1

zeromq3Ubuntu

Fixed in:4.0.4+dfsg-2ubuntu0.1+esm3USN-4920-1

Fixed in:4.1.4-7ubuntu0.1+esm2USN-4920-1

Fixed in:4.2.5-1ubuntu0.2+esm2USN-4920-1

Fixed in:4.3.2-2ubuntu1.20.04.1~esm2USN-4920-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

3.41%probability of exploitation in 30 days

87thpercentile

Elevated risk: more likely to be exploited than 87% of all known CVEs.

References

Patch3

Third-Party Advisory2

Other references2

Related Vulnerabilities

Other CWE-400 (Resource Exhaustion) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-44487	High	7.5	100%	KEV	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2011-3192	High	7.8	99%	-	Fix
CVE-2019-11478	Medium	5.3	95%	-	Fix
CVE-2024-25617	Medium	5.3	89%	-	Fix
CVE-2018-1000115	High	7.5	89%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.