Executive Summary
This Alert is flagged as TOP 25 Common Weakness Enumeration from CWE/SANS. For more information, you can read this.
| Informations | |||
|---|---|---|---|
| Name | CVE-2020-25687 | 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:N/A:H | |||
|---|---|---|---|
| Overall CVSS Score | 5.9 | ||
| Base Score | 5.9 | Environmental Score | 5.9 |
| impact SubScore | 3.6 | Temporal Score | 5.9 |
| Exploitabality Sub Score | 2.2 | ||
| Attack Vector | Network | Attack Complexity | High |
| Privileges Required | None | User Interaction | None |
| Scope | Unchanged | Confidentiality Impact | None |
| Integrity Impact | None | Availability Impact | High |
| Calculate full CVSS 3.0 Vectors scores | |||
Security-Database Scoring CVSS v2
| Cvss vector : (AV:N/AC:M/Au:N/C:N/I:N/A:C) | |||
|---|---|---|---|
| Cvss Base Score | 7.1 | Attack Range | Network |
| Cvss Impact Score | 6.9 | 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. 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. |
Original Source
| Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25687 |
CWE : Common Weakness Enumeration
| % | Id | Name |
|---|---|---|
| 100 % | CWE-122 | Heap-based Buffer Overflow (CWE/SANS Top 25) |
CPE : Common Platform Enumeration
Sources (Detail)
Alert History
| Date | Informations |
|---|---|
| 2023-11-07 21:36:01 |
|
| 2022-09-07 01:53:11 |
|
| 2021-05-04 13:51:05 |
|
| 2021-04-22 03:02:37 |
|
| 2021-03-27 00:22:50 |
|
| 2021-03-26 12:34:04 |
|
| 2021-02-20 09:22:47 |
|
| 2021-02-09 21:23:20 |
|
| 2021-02-04 21:23:22 |
|
| 2021-02-03 17:22:54 |
|
| 2021-01-27 00:22:53 |
|
| 2021-01-26 21:23:30 |
|
| 2021-01-21 00:22:49 |
|
| 2021-01-20 21:23:24 |
|
