CVE-2020-27216

HIGHEPSS 90th pctl

7.0

CVSS v3

Description

In Eclipse Jetty versions 1.0 thru 9.4.32.v20200930, 10.0.0.alpha1 thru 10.0.0.beta2, and 11.0.0.alpha1 thru 11.0.0.beta2O, on Unix like systems, the system's temporary directory is shared between all users on that system. A collocated user can observe the process of creating a temporary sub directory in the shared temporary directory and race to complete the creation of the temporary subdirectory. If the attacker wins the race then they will have read and write permission to the subdirectory used to unpack web applications, including their WEB-INF/lib jar files and JSP files. If any code is ever executed out of this temporary directory, this can lead to a local privilege escalation vulnerability.

CWE-378 CWE-379

How to fix

Remediation Available

jetty9Debian

Fixed in:9.4.33-1CVE-2020-27216

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

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 VectorLocal

Attack ComplexityHigh

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

4.35%probability of exploitation in 30 days

90thpercentile

High risk: more likely to be exploited than 90% of all known CVEs.

References

Related Vulnerabilities

Other CWE-378 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2021-21290	Medium	6.2	1.8%	-	Fix
CVE-2016-9485	High	7.8	1.2%	-	-
CVE-2022-24823	Medium	5.5	1.0%	-	Fix
CVE-2020-8908	Low	3.3	1.0%	-	Fix
CVE-2021-28168	Medium	6.2	0.9%	-	Fix
CVE-2023-0482	Medium	5.5	0.8%	-	Fix

Common questions

How do I fix CVE-2020-27216?

Upgrade jetty9 on debian 11 to 9.4.33-1 or later.

Is CVE-2020-27216 being actively exploited?

Not that we know of. CVE-2020-27216 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 4.4% is the estimated probability that it will be exploited in the next 30 days. That is higher than 90% of all scored CVEs.

How severe is CVE-2020-27216?

CVE-2020-27216 has a CVSS v3 base score of 7.0, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2020-27216 affect?

Published advisories record a fix for jetty9 (Debian). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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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.