Executive Summary
| Informations | |||
|---|---|---|---|
| Name | CVE-2021-31618 | First vendor Publication | 2021-06-15 |
| Vendor | Cve | Last vendor Modification | 2023-11-07 |
Security-Database Scoring CVSS v3
| Cvss vector : CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | |||
|---|---|---|---|
| Overall CVSS Score | 7.5 | ||
| Base Score | 7.5 | Environmental Score | 7.5 |
| impact SubScore | 3.6 | Temporal Score | 7.5 |
| Exploitabality Sub Score | 3.9 | ||
| Attack Vector | Network | Attack Complexity | Low |
| 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:L/Au:N/C:N/I:N/A:P) | |||
|---|---|---|---|
| Cvss Base Score | 5 | Attack Range | Network |
| Cvss Impact Score | 2.9 | Attack Complexity | Low |
| Cvss Expoit Score | 10 | Authentication | None Required |
| Calculate full CVSS 2.0 Vectors scores | |||
Detail
| Apache HTTP Server protocol handler for the HTTP/2 protocol checks received request headers against the size limitations as configured for the server and used for the HTTP/1 protocol as well. On violation of these restrictions and HTTP response is sent to the client with a status code indicating why the request was rejected. This rejection response was not fully initialised in the HTTP/2 protocol handler if the offending header was the very first one received or appeared in a a footer. This led to a NULL pointer dereference on initialised memory, crashing reliably the child process. Since such a triggering HTTP/2 request is easy to craft and submit, this can be exploited to DoS the server. This issue affected mod_http2 1.15.17 and Apache HTTP Server version 2.4.47 only. Apache HTTP Server 2.4.47 was never released. |
Original Source
| Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-31618 |
CWE : Common Weakness Enumeration
| % | Id | Name |
|---|---|---|
| 100 % | CWE-476 | NULL Pointer Dereference |
CPE : Common Platform Enumeration
| Type | Description | Count |
|---|---|---|
| Application | 2 | |
| Application | 1 | |
| Application | 3 | |
| Application | 1 | |
| Os | 2 | |
| Os | 2 |
Sources (Detail)
Alert History
| Date | Informations |
|---|---|
| 2023-11-07 21:34:39 |
|
| 2021-12-10 21:23:14 |
|
| 2021-10-20 17:23:12 |
|
| 2021-09-20 17:23:08 |
|
| 2021-08-04 21:23:21 |
|
| 2021-07-30 21:23:21 |
|
| 2021-07-17 13:22:55 |
|
| 2021-07-09 17:22:53 |
|
| 2021-06-24 21:23:12 |
|
| 2021-06-20 09:22:48 |
|
| 2021-06-16 05:22:52 |
|
| 2021-06-15 17:22:54 |
|
| 2021-06-15 13:22:52 |
|
