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
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 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CVTJUOFFFHINLKWAOC2ZSC5MOPD4SJ24 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FHG7GWSQWKF7JXIMLOGJBKZWBB4VIAJ7 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GHURNEHHUBSW45KMIZ4FNBCSUPWPGV5V https://security.gentoo.org/glsa/202105-20 https://www.oracle.com/security-alerts/cpujan2022.html https://access • 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
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 encontró un fallo en dnsmasq versiones anteriores a 2.83. • https://bugzilla.redhat.com/show_bug.cgi?id=1881875 https://lists.debian.org/debian-lts-announce/2021/03/msg00027.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QGB7HL3OWHTLEPSMLDGOMXQKG3KM2QME https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WYW3IR6APUSKOYKL5FT3ACTIHWHGQY32 https://security.gentoo.org/glsa/202101-17 https://www.debian.org/security/2021/dsa-4844 https://www.jsof-tech.com/disclosures/dnspooq https:// • CWE-122: Heap-based Buffer Overflow •
CVSS: 8.3EPSS: 11%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
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 in the buffer. However, in some code execution paths, it is possible extract_name() gets passed an offset from the base buffer, thus reducing, in practice, the number of available bytes that can be written in the buffer. • https://bugzilla.redhat.com/show_bug.cgi?id=1882014 https://lists.debian.org/debian-lts-announce/2021/03/msg00027.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QGB7HL3OWHTLEPSMLDGOMXQKG3KM2QME https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WYW3IR6APUSKOYKL5FT3ACTIHWHGQY32 https://security.gentoo.org/glsa/202101-17 https://www.debian.org/security/2021/dsa-4844 https://www.jsof-tech.com/disclosures/dnspooq https:// • CWE-122: Heap-based Buffer Overflow CWE-787: Out-of-bounds Write •
CVSS: 7.1EPSS: 9%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
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 a denial of service. The highest threat from this vulnerability is to system availability. • https://bugzilla.redhat.com/show_bug.cgi?id=1882018 https://lists.debian.org/debian-lts-announce/2021/03/msg00027.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QGB7HL3OWHTLEPSMLDGOMXQKG3KM2QME https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WYW3IR6APUSKOYKL5FT3ACTIHWHGQY32 https://security.gentoo.org/glsa/202101-17 https://www.debian.org/security/2021/dsa-4844 https://www.jsof-tech.com/disclosures/dnspooq https:// • CWE-122: Heap-based Buffer Overflow •
CVSS: 7.1EPSS: 9%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
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 denial of service. The highest threat from this vulnerability is to system availability. • https://bugzilla.redhat.com/show_bug.cgi?id=1891568 https://lists.debian.org/debian-lts-announce/2021/03/msg00027.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QGB7HL3OWHTLEPSMLDGOMXQKG3KM2QME https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WYW3IR6APUSKOYKL5FT3ACTIHWHGQY32 https://security.gentoo.org/glsa/202101-17 https://www.debian.org/security/2021/dsa-4844 https://www.jsof-tech.com/disclosures/dnspooq https:// • CWE-122: Heap-based Buffer Overflow •