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CVE-2021-27378

CRITICALCVSS 9.8/10EPSS 1.24%

Last modified

CVE-2021-27378 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 1.24% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
9.8/10

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

EPSS Probability
1.24%

65.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
Rand Core ProjectRand Core>= 0.6.0, < 0.6.2

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-27378?
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.
How severe is CVE-2021-27378?
CVE-2021-27378 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.24% probability of exploitation in the next 30 days.
How do I fix CVE-2021-27378?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-27378?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST