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Azure Storage SAS token leakage into logs on connection errors

Moderate
stefanprodan published GHSA-v554-xwgw-hc3w May 15, 2024

Package

gomod github.com/fluxcd/source-controller (Go)

Affected versions

< 1.2.5

Patched versions

1.2.5

Description

Impact

When source-controller is configured to use an Azure SAS token when connecting to Azure Blob Storage, the token was logged along with the Azure URL when the controller encountered a connection error. An attacker with access to the source-controller logs could use the token to gain access to the Azure Blob Storage until the token expires.

Patches

This vulnerability was fixed in source-controller v1.2.5.

Workarounds

There is no workaround for this vulnerability except for using a different auth mechanism such as Azure Workload Identity.

Credits

This issue was reported and fixed by Jagpreet Singh Tamber (@jagpreetstamber) from the Azure Arc team.

References

#1430

For more information

If you have any questions or comments about this advisory:

  • Open an issue in the source-controller repository.
  • Contact us at the CNCF Flux Channel.

Severity

Moderate

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
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
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:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CVE ID

CVE-2024-31216

Weaknesses