CVE-2021-23357

low-risk
Published 2021-03-15

All versions of package github.com/tyktechnologies/tyk/gateway are vulnerable to Directory Traversal via the handleAddOrUpdateApi function. This function is able to delete arbitrary JSON files on the disk where Tyk is running via the management API. The APIID is provided by the user and this value is then used to create a file on disk. If there is a file found with the same name then it will be deleted and then re-created with the contents of the API creation request.

Do I need to act?

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0.05% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
3
CVSS 3.3/10 Low
LOCAL / HIGH complexity

Affected Products (1)

Tyk

Affected Vendors

Tyk

References (4)

Exploit https://github.com/TykTechnologies/tyk/issues/3390
Third Party Advisory https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMTYKTECHNOLOGIESTYKGATEWAY-1078516
Exploit https://github.com/TykTechnologies/tyk/issues/3390
Third Party Advisory https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMTYKTECHNOLOGIESTYKGATEWAY-1078516
14
/ 100
low-risk
Severity 9/34 · Low
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal