by Kastro
Paper/Archive/CVE-2020-37281

CVE-2020-37281

Gravitee Gravitee API Management — Gravitee API Management through 4.12.22 Default JWT Secret Authentication Bypass

EPSS 0.9%CVSS 9.2
critical.is priorityof 100
39
CVSS 9.2 (CNA)9.2 / 10 × 3027.6Not in CISA KEV+300.0EPSS percentile 59.1.591 × 2011.8No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

Gravitee API Management through 4.12.22 contains an authentication bypass vulnerability that allows unauthenticated remote attackers to impersonate any user by forging JWTs signed with the shipped default jwt.secret. Attackers knowing an existing user ID can sign an HS256 token with that subject and present it as a bearer token to the Management API, impersonating administrators to gain full platform control.

Affected

ProductAffectedFixed inSource
Gravitee API Management≤ 4.12.22–CNA

Scores by source

VulnCheck (CNA)9.2CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
VulnCheck (CNA)8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refgithub.com/gravitee-io/issues/issues/4204writeupgithub.com/gravitee-io/gravitee-api-management/blob/4.12.22/gravitee-apim-rest-api/gravitee-apim-rest-api-standalone/gravitee-apim-rest-api-standalone-distribution/src/main/resources/config/gravitee.yml#L636-L637writeupgithub.com/gravitee-io/gravitee-api-management/blob/4.12.22/gravitee-apim-rest-api/gravitee-apim-rest-api-management/gravitee-apim-rest-api-management-security/src/main/java/io/gravitee/rest/api/management/security/config/BasicSecurityConfigurerAdapter.java#L157-L175writeupgithub.com/gravitee-io/gravitee-api-management/blob/4.12.22/helm/values.yaml#L103writeupgithub.com/gravitee-io/gravitee-docs/blob/master/pages/apim/3.x/how-tos/how-to-general-configuration.adocwriteupvulncheck.com/advisories/gravitee-api-management-through-4.12.22-default-jwt-secret-authentication-bypass