Description (CNA)
Zeroconf is a pure Python implementation of multicast DNS service discovery. Prior to 0.149.16, _read_character_string and _read_string in src/zeroconf/_protocol/incoming.py advanced self.offset by attacker-declared RDLENGTH without checking it against self._data_len, allowing unauthenticated hosts on the local link over UDP/5353 (224.0.0.251 / ff02::fb) to send a TXT, HINFO, or A/AAAA record with rdlength=65535 and seed DNSCache and ServiceInfo.properties with truncated, attacker-shaped key/value or address records. This issue is fixed in version 0.149.16.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| python-zeroconf / python-zeroconf | affected < 0.149.16 |
CWE
CWE-130
References
- https://github.com/python-zeroconf/python-zeroconf/security/advisories/GHSA-qc2x-6f54-m6h9
- https://github.com/python-zeroconf/python-zeroconf/issues/1752
- https://github.com/python-zeroconf/python-zeroconf/pull/1756
- https://github.com/python-zeroconf/python-zeroconf/commit/544449596e645fcaad3834fa0cb614a54f847a82
- https://github.com/python-zeroconf/python-zeroconf/releases/tag/0.149.16
ADP enrichment
No English description supplied.
No references supplied.