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Traefik may display authorization header in the debug logs

Low severity GitHub Reviewed Published Dec 8, 2022 in traefik/traefik • Updated Jan 28, 2023

Package

gomod github.com/traefik/traefik/v2 (Go)

Affected versions

< 2.9.6

Patched versions

2.9.6

Description

Impact

There is a potential vulnerability in Traefik displaying the Authorization header in its debug logs.

Traefik uses oxy to provide the following features:

In such cases, if the log level is set to DEBUG, the credentials provided using the Authorization header are displayed in the debug logs:

level=debug msg="vulcand/oxy/roundrobin/rr: completed ServeHttp on request" Request="{\\"Method\\":\\"POST\\",\\"URL\\":{\\"Scheme\\":\\"\\",\\"Opaque\\":\\"\\",\\"User\\":null,\\"Host\\":\\"\\",\\"Path\\":\\"/<redacted>/<redacted>\\",\\"RawPath\\":\\"\\",\\"ForceQuery\\":false,\\"RawQuery\\":\\"\\",\\"Fragment\\":\\"\\",\\"RawFragment\\":\\"\\"},\\"Proto\\":\\"HTTP/2.0\\",\\"ProtoMajor\\":2,\\"ProtoMinor\\":0,\\"Header\\":{\\"Authorization\\":[\\"Bearer <token value was here>\\"],\\"Content-Type\\":[\\"application/grpc\\"],\\"Grpc-Accept-Encoding\\":[\\"gzip\\"],\\"Grpc-Timeout\\":[\\"29999886u\\"],\\"Te\\":[\\"trailers\\"],\\"User-Agent\\":[\\"<redacted>\\"],<remainder of log message removed>

Patches

traefik/traefik#9574
https://github.com/traefik/traefik/releases/tag/v2.9.6

Workarounds

Set the log level to INFO, WARN, or ERROR.

For more information

If you have any questions or comments about this advisory, please open an issue.

References

@ldez ldez published to traefik/traefik Dec 8, 2022
Published to the GitHub Advisory Database Dec 8, 2022
Reviewed Dec 8, 2022
Published by the National Vulnerability Database Dec 8, 2022
Last updated Jan 28, 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
Low
User interaction
None
Scope
Changed
Confidentiality
Low
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:H/PR:L/UI:N/S:C/C:L/I:N/A:N

EPSS score

0.114%
(46th percentile)

Weaknesses

CVE ID

CVE-2022-23469

GHSA ID

GHSA-h2ph-vhm7-g4hp

Source code

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