Vulnerability Monitor

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CVE-2020-27174

In Amazon AWS Firecracker before 0.21.3, and 0.22.x before 0.22.1, the serial console buffer can grow its memory usage without limit when data is sent to the standard input. This can result in a memory leak on the microVM emulation thread, possibly occupying more memory than intended on the host.

Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.5, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 1 product from amazon organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2020, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2020-10-16T05:15:11.830

Last Modified

2024-11-21T05:20:49.117

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
CWE-401

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	amazon	firecracker	< 0.21.3	Yes
Application	amazon	firecracker	< 0.22.1	Yes

References

http://www.openwall.com/lists/oss-security/2020/10/23/1 Third Party Advisory ([email protected])
https://github.com/firecracker-microvm/firecracker/issues/2177 Third Party Advisory ([email protected])
https://github.com/firecracker-microvm/firecracker/pull/2178 Patch, Third Party Advisory ([email protected])
https://github.com/firecracker-microvm/firecracker/pull/2179 Patch, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2020/10/23/1 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/firecracker-microvm/firecracker/issues/2177 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/firecracker-microvm/firecracker/pull/2178 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/firecracker-microvm/firecracker/pull/2179 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For amazon's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.