Vulnerability in Smartbear Swagger-Codegen
CVE-2021-21363
swagger-codegen is an open-source project which contains a template-driven engine to generate documentation, API clients and server stubs in different languages by parsing your OpenAPI / Swagger definition. In swagger-codegen before version 2.4.19, on Unix like systems, the system's temporary directory is shared between all users on that system. A collocated user can observe the process of creating a temporary sub directory in the shared temporary directory and race to complete the creation of the temporary subdirectory. This vulnerability is local privilege escalation because the contents of the `outputFolder` can be appended to by an attacker. As such, code written to this directory, when executed can be attacker controlled. For more details refer to the referenced GitHub Security Advisory. This vulnerability is fixed in version 2.4.19. Note this is a distinct vulnerability from CVE-2021-21364.
EPSS: 0.004 (34.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:N/I:H/A:N.
Affected products
- Smartbear Swagger-codegen
- Swagger-api Swagger-codegen — versions < 2.4.19
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Third Party Advisory)
- security-advisories@github.com (Patch, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-21363?
- CVE-2021-21363 is a medium-severity vulnerability in Smartbear Swagger-Codegen, classified under Creation of Temporary File With Insecure Permissions. CVSS score: 5.3/10. Published 2021-03-11.
- How severe is CVE-2021-21363?
- Medium severity. CVSS v3 base score is 5.3 out of 10.