CVSS 3.7 · Low EPSS 4,0%
Kerentanan Improperly Implemented Security Check for Standard pada thekelleys dnsmasq, fedoraproject fedora +2 lainnya. Skor CVSS 3.1 3.7 (Low) menurut NVD.
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 attributes that all must be used to match a reply. This flaw allows an attacker to perform a DNS Cache Poisoning attack. If chained with CVE-2020-25685 or CVE-2020-25686, the attack complexity of a successful attack is reduced. The highest threat from this vulnerability is to data integrity.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
· uraikan di kalkulator | Vendor | Produk | Versi terdampak |
|---|---|---|
| thekelleys | dnsmasq | Semua versi sebelum 2.83 |
| fedoraproject | fedora | Versi 32 |
| fedoraproject | fedora | Versi 33 |
| debian | debian linux | Versi 9.0 |
| debian | debian linux | Versi 10.0 |
| arista | eos | Versi 4.21 hingga sebelum 4.21.14m |
| arista | eos | Versi 4.22 hingga sebelum 4.22.9m |
| arista | eos | Versi 4.23 hingga sebelum 4.23.7m |
| arista | eos | Versi 4.24 hingga sebelum 4.24.5m |
| arista | eos | Versi 4.25 hingga sebelum 4.25.2f |