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linux-loader reading beyond EOF could lead to infinite loop

Low severity GitHub Reviewed Published Dec 12, 2022 in rust-vmm/linux-loader • Updated Jan 31, 2023

Package

cargo linux-loader (Rust)

Affected versions

< 0.8.1

Patched versions

0.8.1

Description

Impact

The linux-loader crate used the offsets and sizes provided in the ELF headers to determine the offsets to read from. If those offsets pointed beyond the end of the file this could lead to an infinite loop. Virtual Machine Monitors using the linux-loader crate could enter an infinite loop if the ELF header of the kernel they are loading was modified in a malicious manner.

Patches

The issue has been addressed in 0.8.1

Workarounds

The issue can be mitigated by ensuring that only trusted kernel images are loaded or by verifying that the headers to not point beyond the end of the file.

References

See: rust-vmm/linux-loader#125

References

@rbradford rbradford published to rust-vmm/linux-loader Dec 12, 2022
Published to the GitHub Advisory Database Dec 12, 2022
Reviewed Dec 12, 2022
Published by the National Vulnerability Database Dec 13, 2022
Last updated Jan 31, 2023

Severity

Low

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Local
Attack complexity
High
Privileges required
High
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L

EPSS score

0.044%
(14th percentile)

Weaknesses

CVE ID

CVE-2022-23523

GHSA ID

GHSA-52h2-m2cf-9jh6

Source code

Credits

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