CVE-2021-43783

CVSS V2 Medium 5.5 CVSS V3 High 8.5
Description
@backstage/plugin-scaffolder-backend is the backend for the default Backstage software templates. In affected versions a malicious actor with write access to a registered scaffolder template is able to manipulate the template in a way that writes files to arbitrary paths on the scaffolder-backend host instance. This vulnerability can in some situation also be exploited through user input when executing a template, meaning you do not need write access to the templates. This method will not allow the attacker to control the contents of the injected file however, unless the template is also crafted in a specific way that gives control of the file contents. This vulnerability is fixed in version `0.15.14` of the `@backstage/plugin-scaffolder-backend`. This attack is mitigated by restricting access and requiring reviews when registering or modifying scaffolder templates.
Overview
  • CVE ID
  • CVE-2021-43783
  • Assigner
  • security-advisories@github.com
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-11-29T20:15:08
  • Last Modified Date
  • 2021-12-01T19:41:55
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:backstage:backstage:*:*:*:*:*:*:*:* 1 OR 0.15.14
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:L/Au:S/C:N/I:P/A:P
  • Access Vector
  • NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • SINGLE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • PARTIAL
  • Base Score
  • 5.5
  • Severity
  • MEDIUM
  • Exploitability Score
  • 8
  • Impact Score
  • 4.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • LOW
  • User Interaction
  • NONE
  • Scope
  • CHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • LOW
  • Base Score
  • 8.5
  • Base Severity
  • HIGH
  • Exploitability Score
  • 3.1
  • Impact Score
  • 4.7
History
Created Old Value New Value Data Type Notes
2022-05-10 06:43:43 Added to TrackCVE
2022-12-05 15:15:34 2021-11-29T20:15Z 2021-11-29T20:15:08 CVE Published Date updated
2022-12-05 15:15:34 2021-12-01T19:41:55 CVE Modified Date updated
2022-12-05 15:15:34 Analyzed Vulnerability Status updated