Is CVE-2021-27378 in the CISA KEV catalog?

No. CVE-2021-27378 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-27378?

CVE-2021-27378 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2021-27378?

CVE-2021-27378 has an EPSS score of 1.24% (66th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-27378?

Upgrade rand core to 0.6.2 or later.

CVE & CISA-KEV Catalog

CVE-2021-27378

CRITICAL

9.8

CVSS v3

NVD

Description

An issue was discovered in the rand_core crate before 0.6.2 for Rust. Because read_u32_into and read_u64_into mishandle certain buffer-length checks, a random number generator may be seeded with too little data.

CWE-131

How to fix

Remediation Available

rand coreNVD

Affected:>= 0.6.0, < 0.6.2Fixed in:0.6.2CVE-2021-27378derived from NVD

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 VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

1.24%probability of exploitation in 30 days

66thpercentile

Moderate risk: more likely to be exploited than 66% of all known CVEs.

References

Third-Party Advisory1

rustsec.org

Related Vulnerabilities

Other CWE-131 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-36824	High	7.4	77%	-	Fix
CVE-2020-8450	High	7.3	72%	-	Fix
CVE-2020-6113	High	7.8	69%	-	-
CVE-2026-42945	Critical	8.1	61%	-	Fix
CVE-2020-6116	High	7.8	28%	-	-
CVE-2005-3120	Critical	9.8	23%	-	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.