156 matches found
zeroconf: Unvalidated rdlength in record payload readers allows LAN-local cache corruption via crafted mDNS packet
Impact readcharacterstring and readstring in src/zeroconf/protocol/incoming.py sliced self.dataself.offset : self.offset + length and advanced self.offset by the declared length without checking it against self.datalen. Python's slice silently returns fewer bytes when the end index runs past the...
python311-zeroconf-0.149.16-1.1 on GA media (moderate)
python311-zeroconf-0.149.16-1.1 on GA media Announcement ID: openSUSE-SU-2026:11036-1 Rating: moderate Cross-References: CVE-2026-48487 Affected Products: openSUSE Tumbleweed An update that solves one vulnerability can now be installed. Description: These are all security issues fixed in the...
PT-2026-49728
Name of the Vulnerable Software and Affected Versions Zeroconf versions prior to 0.149.16 Description Unauthenticated hosts on the local link via UDP/5353 can send specially crafted TXT, HINFO, or A/AAAA records to seed the DNSCache and ServiceInfo.properties with truncated, attacker-shaped...
OPENSUSE-SU-2026:11036-1 python311-zeroconf-0.149.16-1.1 on GA media
These are all security issues fixed in the python311-zeroconf-0.149.16-1.1 package on the GA media of openSUSE Tumbleweed...
GHSA-9663-MQMP-P9MM python-zeroconf: Unbounded TC-deferred queue allows LAN-local memory exhaustion via spoofed-source flood
Impact AsyncListener.handlequeryordefer retained every truncated TC-bit incoming query in self.deferredaddr and armed a per-addr timer in self.timersaddr that flushed the reassembled query within 500 ms RFC 6762 §18.5. Neither the per-addr list nor the number of distinct addr keys was capped, and...
Allocation of Resources Without Limits or Throttling
Overview zeroconf is a Pure Python Multicast DNS Service Discovery Library Bonjour/Avahi compatible Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via the AsyncListener.handlequeryordefer function. An attacker can exhaust system memory and...
PT-2026-48689
Name of the Vulnerable Software and Affected Versions Zeroconf versions prior to 0.149.12 Description An issue exists in the AsyncListener.handle query or defer function where the software retains every truncated TC-bit incoming query in self. deferredaddr and arms a per-address timer in self...
Allocation of Resources Without Limits or Throttling
Overview zeroconf is a Pure Python Multicast DNS Service Discovery Library Bonjour/Avahi compatible Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via the DNSCache.asyncadd. Any unauthenticated host on the local link can exhaust system...
zeroconf has unbounded DNS record cache that allows LAN-local memory exhaustion via multicast flood
Impact DNSCache.asyncadd inserted every response record into cache, expirations, expireheap, and servicecache with no cap on entry count. The only pre-existing protection was a PTR TTL floor DNSPTRMINTTL = 1125 s, RFC 6762 §10, which actually prolonged attacker-injected records, and a periodic...
GHSA-RFG2-PJW2-56X2 zeroconf has unbounded DNS record cache that allows LAN-local memory exhaustion via multicast flood
Impact DNSCache.asyncadd inserted every response record into cache, expirations, expireheap, and servicecache with no cap on entry count. The only pre-existing protection was a PTR TTL floor DNSPTRMINTTL = 1125 s, RFC 6762 §10, which actually prolonged attacker-injected records, and a periodic...
zeroconf: Unbounded exception-dedup state retains packet buffers via traceback frame locals, enabling LAN-local memory exhaustion
Impact DNSIncoming.logexceptiondebug and the four QuietLogger exception-dedup methods stored an unbounded seenlogs dict keyed by strsys.excinfo1. The seven IncomingDecodeError messages raised from readname / decodelabelsatoffset RFC 6762 §18 name-decoding error paths all embed self.source — the...
Allocation of Resources Without Limits or Throttling
Overview zeroconf is a Pure Python Multicast DNS Service Discovery Library Bonjour/Avahi compatible Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via the DNSIncoming.logexceptiondebug function and the exception-deduplication, which stores...
GHSA-PHVX-9MGW-67R5 zeroconf: Unbounded exception-dedup state retains packet buffers via traceback frame locals, enabling LAN-local memory exhaustion
Impact DNSIncoming.logexceptiondebug and the four QuietLogger exception-dedup methods stored an unbounded seenlogs dict keyed by strsys.excinfo1. The seven IncomingDecodeError messages raised from readname / decodelabelsatoffset RFC 6762 §18 name-decoding error paths all embed self.source — the...
GHSA-9PGC-3CCV-5297 zeroconf has unbounded recursion in DNS compression-pointer decoder that allows LAN-local denial of service
Impact DNSIncoming.decodelabelsatoffset recurses once per DNS-name compression pointer RFC 1035 §4.1.4. Pointer cycles and label counts were capped, but the chain length of unique forward pointers was not. A single 3 kB mDNS packet carrying 1500 chained pointers drives the recursion past CPython'...
Uncontrolled Recursion
Overview zeroconf is a Pure Python Multicast DNS Service Discovery Library Bonjour/Avahi compatible Affected versions of this package are vulnerable to Uncontrolled Recursion via the DNSIncoming.decodelabelsatoffset function. An attacker can cause excessive CPU consumption and log flooding by...
zeroconf has unbounded recursion in DNS compression-pointer decoder that allows LAN-local denial of service
Impact DNSIncoming.decodelabelsatoffset recurses once per DNS-name compression pointer RFC 1035 §4.1.4. Pointer cycles and label counts were capped, but the chain length of unique forward pointers was not. A single 3 kB mDNS packet carrying 1500 chained pointers drives the recursion past CPython'...
PT-2026-45025
Name of the Vulnerable Software and Affected Versions zeroconf versions prior to 0.149.6 Description An unauthenticated host on the local link can cause excessive memory growth by sending malformed packets to UDP port 5353. The DNSIncoming. log exception debug function and QuietLogger...
PT-2026-45026
Name of the Vulnerable Software and Affected Versions zeroconf versions prior to 0.149.6 Description An unauthenticated host on the local link can send multicast mDNS responses with unique names to the DNSCache. async add function, causing records to accumulate in cache, expirations, expire heap,...
PT-2026-45024
Name of the Vulnerable Software and Affected Versions zeroconf versions prior to 0.149.5 Description An unauthenticated host on the local link can degrade the mDNS listener by sending a specially crafted mDNS packet. The DNSIncoming. decode labels at offset function recurses for each DNS-name...
