ip-address is a library for parsing and manipulating IPv4 and IPv6 addresses in JavaScript. Prior to 10.7.1, the isInSubnet and isHostInSubnet methods in src/common.ts compare masked binary strings without validating that both operands use the same IP family. A cross-family containment check whose leading address bits match makes the masked strings compare equal even though IPv4 and IPv6 do not share an address space.
An allowlist or denylist decision can therefore classify an address outside the intended range as contained. This issue is fixed in version 10.7.1.
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
None
No data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products
beaugunderson:ip-address
References 3
https://github.com/beaugunderson/ip-address/commit/1343629d57fea413644a5c9d41ff…
security-advisories@github.com
https://github.com/beaugunderson/ip-address/releases/tag/v10.7.1
security-advisories@github.com
https://github.com/beaugunderson/ip-address/security/advisories/GHSA-j6r3-76f7-…
security-advisories@github.com