4.3
CVE-2020-25684
- EPSS 0.27%
- Veröffentlicht 20.01.2021 16:15:14
- Zuletzt bearbeitet 04.11.2025 20:15:57
- Quelle secalert@redhat.com
- CVE-Watchlists
- Unerledigt
LoginA 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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Thekelleys ≫ Dnsmasq Version < 2.83
Fedoraproject ≫ Fedora Version32
Fedoraproject ≫ Fedora Version33
Debian ≫ Debian Linux Version9.0
Debian ≫ Debian Linux Version10.0
| Typ | Quelle | Score | Percentile |
|---|---|---|---|
| EPSS | FIRST.org | 0.27% | 0.503 |
| Quelle | Base Score | Exploit Score | Impact Score | Vector String |
|---|---|---|---|---|
| nvd@nist.gov | 3.7 | 2.2 | 1.4 |
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
|
| nvd@nist.gov | 4.3 | 8.6 | 2.9 |
AV:N/AC:M/Au:N/C:N/I:P/A:N
|
CWE-358 Improperly Implemented Security Check for Standard
The product does not implement or incorrectly implements one or more security-relevant checks as specified by the design of a standardized algorithm, protocol, or technique.