CVSS: 9.8EPSS: 0%CPEs: 1EXPL: 1CVE-2021-45953
https://notcve.org/view.php?id=CVE-2021-45953
31 Dec 2021 — Dnsmasq 2.86 has a heap-based buffer overflow in extract_name (called from hash_questions and fuzz_util.c). NOTE: the vendor's position is that CVE-2021-45951 through CVE-2021-45957 "do not represent real vulnerabilities, to the best of our knowledge. ** EN DISPUTA ** Dnsmasq versión 2.86 presenta un desbordamiento de buffer en la región heap de la memoria en la función extract_name (llamado desde hash_questions y fuzz_util.c). NOTA: la posición del proveedor es que CVE-2021-45951 a CVE-2021-45957 "no repre... • https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35858 • CWE-787: Out-of-bounds Write •
CVSS: 4.3EPSS: 0%CPEs: 6EXPL: 1CVE-2021-3448 – dnsmasq: fixed outgoing port used when --server is used with an interface name
https://notcve.org/view.php?id=CVE-2021-3448
08 Apr 2021 — A flaw was found in dnsmasq in versions before 2.85. When configured to use a specific server for a given network interface, dnsmasq uses a fixed port while forwarding queries. An attacker on the network, able to find the outgoing port used by dnsmasq, only needs to guess the random transmission ID to forge a reply and get it accepted by dnsmasq. This flaw makes a DNS Cache Poisoning attack much easier. The highest threat from this vulnerability is to data integrity. • https://bugzilla.redhat.com/show_bug.cgi?id=1939368 • CWE-358: Improperly Implemented Security Check for Standard •
CVSS: 8.3EPSS: 18%CPEs: 5EXPL: 0CVE-2020-25681 – dnsmasq: heap-based buffer overflow in sort_rrset() when DNSSEC is enabled
https://notcve.org/view.php?id=CVE-2020-25681
19 Jan 2021 — A flaw was found in dnsmasq before version 2.83. A heap-based buffer overflow was discovered in the way RRSets are sorted before validating with DNSSEC data. An attacker on the network, who can forge DNS replies such as that they are accepted as valid, could use this flaw to cause a buffer overflow with arbitrary data in a heap memory segment, possibly executing code on the machine. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. Se encontr... • https://bugzilla.redhat.com/show_bug.cgi?id=1881875 • CWE-122: Heap-based Buffer Overflow •
CVSS: 8.3EPSS: 37%CPEs: 5EXPL: 0CVE-2020-25682 – dnsmasq: buffer overflow in extract_name() due to missing length check when DNSSEC is enabled
https://notcve.org/view.php?id=CVE-2020-25682
19 Jan 2021 — A flaw was found in dnsmasq before 2.83. A buffer overflow vulnerability was discovered in the way dnsmasq extract names from DNS packets before validating them with DNSSEC data. An attacker on the network, who can create valid DNS replies, could use this flaw to cause an overflow with arbitrary data in a heap-allocated memory, possibly executing code on the machine. The flaw is in the rfc1035.c:extract_name() function, which writes data to the memory pointed by name assuming MAXDNAME*2 bytes are available ... • https://bugzilla.redhat.com/show_bug.cgi?id=1882014 • CWE-122: Heap-based Buffer Overflow CWE-787: Out-of-bounds Write •
CVSS: 7.1EPSS: 29%CPEs: 5EXPL: 0CVE-2020-25683 – dnsmasq: heap-based buffer overflow with large memcpy in get_rdata() when DNSSEC is enabled
https://notcve.org/view.php?id=CVE-2020-25683
19 Jan 2021 — A flaw was found in dnsmasq before version 2.83. A heap-based buffer overflow was discovered in dnsmasq when DNSSEC is enabled and before it validates the received DNS entries. A remote attacker, who can create valid DNS replies, could use this flaw to cause an overflow in a heap-allocated memory. This flaw is caused by the lack of length checks in rfc1035.c:extract_name(), which could be abused to make the code execute memcpy() with a negative size in get_rdata() and cause a crash in dnsmasq, resulting in ... • https://bugzilla.redhat.com/show_bug.cgi?id=1882018 • CWE-122: Heap-based Buffer Overflow •
CVSS: 4.3EPSS: 0%CPEs: 10EXPL: 0CVE-2020-25684 – dnsmasq: loose address/port check in reply_query() makes forging replies easier for an off-path attacker
https://notcve.org/view.php?id=CVE-2020-25684
19 Jan 2021 — A flaw was found in dnsmasq before version 2.83. When getting a reply from a forwarded query, dnsmasq checks in the forward.c:reply_query() if the reply destination address/port is used by the pending forwarded queries. However, it does not use the address/port to retrieve the exact forwarded query, substantially reducing the number of attempts an attacker on the network would have to perform to forge a reply and get it accepted by dnsmasq. This issue contrasts with RFC5452, which specifies a query's attrib... • https://bugzilla.redhat.com/show_bug.cgi?id=1889686 • CWE-358: Improperly Implemented Security Check for Standard •
CVSS: 4.3EPSS: 0%CPEs: 9EXPL: 0CVE-2020-25685 – dnsmasq: loose query name check in reply_query() makes forging replies easier for an off-path attacker
https://notcve.org/view.php?id=CVE-2020-25685
19 Jan 2021 — A flaw was found in dnsmasq before version 2.83. When getting a reply from a forwarded query, dnsmasq checks in forward.c:reply_query(), which is the forwarded query that matches the reply, by only using a weak hash of the query name. Due to the weak hash (CRC32 when dnsmasq is compiled without DNSSEC, SHA-1 when it is) this flaw allows an off-path attacker to find several different domains all having the same hash, substantially reducing the number of attempts they would have to perform to forge a reply an... • https://bugzilla.redhat.com/show_bug.cgi?id=1889688 • CWE-326: Inadequate Encryption Strength •
CVSS: 4.3EPSS: 0%CPEs: 9EXPL: 1CVE-2020-25686 – dnsmasq: multiple queries forwarded for the same name makes forging replies easier for an off-path attacker
https://notcve.org/view.php?id=CVE-2020-25686
19 Jan 2021 — A flaw was found in dnsmasq before version 2.83. When receiving a query, dnsmasq does not check for an existing pending request for the same name and forwards a new request. By default, a maximum of 150 pending queries can be sent to upstream servers, so there can be at most 150 queries for the same name. This flaw allows an off-path attacker on the network to substantially reduce the number of attempts that it would have to perform to forge a reply and have it accepted by dnsmasq. This issue is mentioned i... • https://github.com/knqyf263/dnspooq • CWE-290: Authentication Bypass by Spoofing CWE-358: Improperly Implemented Security Check for Standard •
CVSS: 7.1EPSS: 17%CPEs: 5EXPL: 0CVE-2020-25687 – dnsmasq: heap-based buffer overflow with large memcpy in sort_rrset() when DNSSEC is enabled
https://notcve.org/view.php?id=CVE-2020-25687
19 Jan 2021 — A flaw was found in dnsmasq before version 2.83. A heap-based buffer overflow was discovered in dnsmasq when DNSSEC is enabled and before it validates the received DNS entries. This flaw allows a remote attacker, who can create valid DNS replies, to cause an overflow in a heap-allocated memory. This flaw is caused by the lack of length checks in rfc1035.c:extract_name(), which could be abused to make the code execute memcpy() with a negative size in sort_rrset() and cause a crash in dnsmasq, resulting in a ... • https://bugzilla.redhat.com/show_bug.cgi?id=1891568 • CWE-122: Heap-based Buffer Overflow •
CVSS: 4.3EPSS: 0%CPEs: 2EXPL: 0CVE-2019-14834 – dnsmasq: memory leak in the create_helper() function in /src/helper.c
https://notcve.org/view.php?id=CVE-2019-14834
07 Jan 2020 — A vulnerability was found in dnsmasq before version 2.81, where the memory leak allows remote attackers to cause a denial of service (memory consumption) via vectors involving DHCP response creation. Se encontró una vulnerabilidad en dnsmasq versiones anteriores a la versión 2.81, donde la pérdida de memoria permite a atacantes remotos causar una denegación de servicio (consumo de memoria) por medio de vectores que implican una creación de respuesta DHCP. A flaw was found in the Dnsmasq application where a ... • http://thekelleys.org.uk/gitweb/?p=dnsmasq.git%3Ba=commit%3Bh=69bc94779c2f035a9fffdb5327a54c3aeca73ed5 • CWE-770: Allocation of Resources Without Limits or Throttling •