OpenSIPS versions 3.1 before 3.6.4 containing the auth_jwt module (prior to commit 3822d33) contain a SQL injection vulnerability in the jwt_db_authorize() function in modules/auth_jwt/authorize.c when db_mode is enabled and a SQL database backend is used. The function extracts the tag claim from a JWT without prior signature verification and incorporates the unescaped value directly into a SQL query. An attacker can supply a crafted JWT with a malicious tag claim to manipulate the query result and bypass JWT authentication, allowing impersonation of arbitrary identities.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 5
https://github.com/OpenSIPS/opensips/commit/3822d33c1c6b25832fdd88da1d23eed74be…
disclosure@vulncheck.com
https://github.com/OpenSIPS/opensips/pull/3807
disclosure@vulncheck.com
https://opensips.org/
disclosure@vulncheck.com
https://opensips.org/pub/opensips/3.6.4/ChangeLog
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/opensips-auth-jwt-sql-injection-enables-jw…
disclosure@vulncheck.com