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Possible leak of key's raw field if declared length is incorrect

High severity GitHub Reviewed Published Jul 6, 2022 in scottcwang/openssh_key_parser • Updated Jan 27, 2023

Package

pip openssh-key-parser (pip)

Affected versions

< 0.0.6

Patched versions

0.0.6

Description

Impact

If a field of a key is shorter than it is declared to be, the parser raises an error with a message containing the raw field value. An attacker able to modify the declared length of a key's sensitive field can thus expose the raw value of that field.

Patches

Upgrade to version 0.0.6, which no longer includes the raw field value in the error message.

Workarounds

N/A

References

N/A

For more information

If you have any questions or comments about this advisory:

References

@scottcwang scottcwang published to scottcwang/openssh_key_parser Jul 6, 2022
Published by the National Vulnerability Database Jul 6, 2022
Published to the GitHub Advisory Database Jul 6, 2022
Reviewed Jul 6, 2022
Last updated Jan 27, 2023

Severity

High

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
Low
Privileges required
Low
User interaction
None
Scope
Changed
Confidentiality
High
Integrity
None
Availability
None

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:L/PR:L/UI:N/S:C/C:H/I:N/A:N

EPSS score

0.144%
(51st percentile)

Weaknesses

CVE ID

CVE-2022-31124

GHSA ID

GHSA-hm37-9xh2-q499

Source code

Credits

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