Is CVE-2018-20482 in the CISA KEV catalog?

No. CVE-2018-20482 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-20482?

CVE-2018-20482 has a CVSS v3 base score of 4.7 (MEDIUM).

What is the EPSS score for CVE-2018-20482?

CVE-2018-20482 has an EPSS score of 0.53% (41th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-20482?

Upgrade tar on debian 11 to 1.30+dfsg-3.1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2018-20482

MEDIUM

4.7

CVSS v3

NVD

Description

GNU Tar through 1.30, when --sparse is used, mishandles file shrinkage during read access, which allows local users to cause a denial of service (infinite read loop in sparse_dump_region in sparse.c) by modifying a file that is supposed to be archived by a different user's process (e.g., a system backup running as root).

CWE-835

How to fix

Remediation Available

tarDebian

Fixed in:1.30+dfsg-3.1CVE-2018-20482

tarUbuntu

Fixed in:1.27.1-1ubuntu0.1+esm1USN-4692-1

Fixed in:1.28-2.1ubuntu0.2USN-4692-1

Fixed in:1.29b-2ubuntu0.2USN-4692-1

Fixed in:1.30+dfsg-7ubuntu0.20.04.1USN-4692-1

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 VectorLocal

Attack ComplexityHigh

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.53%probability of exploitation in 30 days

41stpercentile

Moderate risk: more likely to be exploited than 41% of all known CVEs.

References

Patch3

Exploit1

news.ycombinator.com

Third-Party Advisory6

Related Vulnerabilities

Other CWE-835 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-13935	High	7.5	88%	-	Fix
CVE-2020-36227	High	7.5	78%	-	Fix
CVE-2022-0778	High	7.5	71%	-	Fix
CVE-2019-14241	High	7.5	70%	-	-
CVE-2017-16944	High	7.5	63%	-	Fix
CVE-2024-20353	High	8.6	63%	KEV	-

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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.