SB2026091648 - Multiple vulnerabilities in ip-address

Description

This security bulletin contains information about 2 vulnerabilities.

1) Incorrect Comparison (CVE-ID: N/A)

CWE-ID: CWE-697 - Incorrect Comparison

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to bypass IP address allowlist restrictions.

The vulnerability exists due to incorrect comparison in the isInSubnet() and isHostInSubnet() functions when comparing IPv4 and IPv6 addresses. A remote attacker can provide an address from a different address family with matching leading bits to bypass IP address allowlist restrictions.

Exploitation requires an application to parse untrusted input as either address family and compare it against a fixed-family allowlist.

2) Allocation of Resources Without Limits or Throttling (CVE-ID: N/A)

CWE-ID: CWE-770 - Allocation of Resources Without Limits or Throttling

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to allocation of resources without limits in the Address6 parse diagnostic generation when processing oversized invalid IPv6 address strings. A remote attacker can submit a specially crafted oversized address string to cause a denial of service.

Address6.isValid() constructs the diagnostic before discarding it.

Remediation

Install update from vendor's website.

References

• https://github.com/beaugunderson/ip-address/security/advisories/GHSA-j6r3-76f7-8jcv
• https://github.com/beaugunderson/ip-address/security/advisories/GHSA-h3mg-xc3c-68pw