Executive Summary
| Informations | |||
|---|---|---|---|
| Name | CVE-2020-25685 | First vendor Publication | 2021-01-20 |
| Vendor | Cve | Last vendor Modification | 2023-11-07 |
Security-Database Scoring CVSS v3
| Cvss vector : CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N | |||
|---|---|---|---|
| Overall CVSS Score | 3.7 | ||
| Base Score | 3.7 | Environmental Score | 3.7 |
| impact SubScore | 1.4 | Temporal Score | 3.7 |
| Exploitabality Sub Score | 2.2 | ||
| Attack Vector | Network | Attack Complexity | High |
| Privileges Required | None | User Interaction | None |
| Scope | Unchanged | Confidentiality Impact | None |
| Integrity Impact | Low | Availability Impact | None |
| Calculate full CVSS 3.0 Vectors scores | |||
Security-Database Scoring CVSS v2
| Cvss vector : (AV:N/AC:M/Au:N/C:N/I:P/A:N) | |||
|---|---|---|---|
| Cvss Base Score | 4.3 | Attack Range | Network |
| Cvss Impact Score | 2.9 | Attack Complexity | Medium |
| Cvss Expoit Score | 8.6 | Authentication | None Required |
| Calculate full CVSS 2.0 Vectors scores | |||
Detail
| 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 and get it accepted by dnsmasq. This is in contrast with RFC5452, which specifies that the query name is one of the attributes of a query that must be used to match a reply. This flaw could be abused to perform a DNS Cache Poisoning attack. If chained with CVE-2020-25684 the attack complexity of a successful attack is reduced. The highest threat from this vulnerability is to data integrity. |
Original Source
| Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25685 |
CWE : Common Weakness Enumeration
| % | Id | Name |
|---|---|---|
| 100 % | CWE-326 | Inadequate Encryption Strength |
CPE : Common Platform Enumeration
Sources (Detail)
Alert History
| Date | Informations |
|---|---|
| 2024-04-25 02:10:06 |
|
| 2023-11-07 21:36:01 |
|
| 2023-09-06 02:03:47 |
|
| 2022-12-08 09:27:31 |
|
| 2022-10-07 21:27:45 |
|
| 2022-09-07 01:53:11 |
|
| 2022-02-14 21:22:35 |
|
| 2022-01-25 17:23:15 |
|
| 2021-05-04 13:50:43 |
|
| 2021-04-22 03:02:33 |
|
| 2021-02-22 21:23:17 |
|
| 2021-02-20 09:22:47 |
|
| 2021-02-09 05:22:47 |
|
| 2021-02-04 21:23:22 |
|
| 2021-01-29 00:22:52 |
|
| 2021-01-26 21:23:30 |
|
| 2021-01-21 00:22:49 |
|
| 2021-01-20 21:23:24 |
|
