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sanic vulnerable to Path Traversal when using `app.static` if using encoded `%2F` URLs

High severity GitHub Reviewed Published Jul 31, 2022 in sanic-org/sanic • Updated Jan 31, 2023

Package

pip sanic (pip)

Affected versions

>= 22.0.0, < 22.6.1
>= 21.0.0, < 21.12.2
< 20.12.7

Patched versions

22.6.1
21.12.2
20.12.7

Description

Impact

Access to lateral directories when using app.static if using encoded %2F URLs. Parent directory traversal is not impacted.

Patches

  • v20.12.7 (LTS)
  • v21.12.2 (LTS)
  • v22.6.1

References

sanic-org/sanic#2478
sanic-org/sanic#2495

For more information

If you have any questions or comments about this advisory:

References

@ahopkins ahopkins published to sanic-org/sanic Jul 31, 2022
Published by the National Vulnerability Database Aug 1, 2022
Published to the GitHub Advisory Database Aug 6, 2022
Reviewed Aug 6, 2022
Last updated Jan 31, 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
None
User interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
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:L/PR:N/UI:N/S:C/C:L/I:L/A:L

EPSS score

0.116%
(46th percentile)

Weaknesses

CVE ID

CVE-2022-35920

GHSA ID

GHSA-8cw9-5hmv-77w6

Source code

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