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Panic due to malformed WALs in go.etcd.io/etcd

Low severity GitHub Reviewed Published Aug 5, 2020 in etcd-io/etcd • Updated Oct 2, 2023

Package

gomod go.etcd.io/etcd (Go)

Affected versions

< 0.5.0-alpha.5.0.20200423152442-f4b650b51dc4

Patched versions

0.5.0-alpha.5.0.20200423152442-f4b650b51dc4

Description

Vulnerability type

Data Validation

Detail

The size of a record is stored in the length field of a WAL file and no additional validation is done on this data. Therefore, it is possible to forge an extremely large frame size that can unintentionally panic at the expense of any RAFT participant trying to decode the WAL.

Specific Go Packages Affected

github.com/etcd-io/etcd/wal

References

Find out more on this vulnerability in the security audit report

For more information

If you have any questions or comments about this advisory:

References

@spzala spzala published to etcd-io/etcd Aug 5, 2020
Published by the National Vulnerability Database Aug 5, 2020
Published to the GitHub Advisory Database Feb 7, 2023
Reviewed Feb 7, 2023
Last updated Oct 2, 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
Network
Attack complexity
High
Privileges required
None
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:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS score

0.075%
(35th percentile)

Weaknesses

CVE ID

CVE-2020-15106

GHSA ID

GHSA-p4g4-wgrh-qrg2

Source code

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