Executive Summary
| Informations | |||
|---|---|---|---|
| Name | CVE-2020-8833 | First vendor Publication | 2020-04-22 |
| Vendor | Cve | Last vendor Modification | 2022-10-07 |
Security-Database Scoring CVSS v3
| Cvss vector : CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N | |||
|---|---|---|---|
| Overall CVSS Score | 4.7 | ||
| Base Score | 4.7 | Environmental Score | 4.7 |
| impact SubScore | 3.6 | Temporal Score | 4.7 |
| Exploitabality Sub Score | 1 | ||
| Attack Vector | Local | Attack Complexity | High |
| Privileges Required | Low | User Interaction | None |
| Scope | Unchanged | Confidentiality Impact | High |
| Integrity Impact | None | Availability Impact | None |
| Calculate full CVSS 3.0 Vectors scores | |||
Security-Database Scoring CVSS v2
| Cvss vector : (AV:L/AC:M/Au:N/C:P/I:N/A:N) | |||
|---|---|---|---|
| Cvss Base Score | 1.9 | Attack Range | Local |
| Cvss Impact Score | 2.9 | Attack Complexity | Medium |
| Cvss Expoit Score | 3.4 | Authentication | None Required |
| Calculate full CVSS 2.0 Vectors scores | |||
Detail
| Time-of-check Time-of-use Race Condition vulnerability on crash report ownership change in Apport allows for a possible privilege escalation opportunity. If fs.protected_symlinks is disabled, this can be exploited between the os.open and os.chown calls when the Apport cron script clears out crash files of size 0. A symlink with the same name as the deleted file can then be created upon which chown will be called, changing the file owner to root. Fixed in versions 2.20.1-0ubuntu2.23, 2.20.9-0ubuntu7.14, 2.20.11-0ubuntu8.8 and 2.20.11-0ubuntu22. |
Original Source
| Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-8833 |
CWE : Common Weakness Enumeration
| % | Id | Name |
|---|---|---|
| 100 % | CWE-367 | Time-of-check Time-of-use (TOCTOU) Race Condition |
CPE : Common Platform Enumeration
| Type | Description | Count |
|---|---|---|
| Application | 1 | |
| Os | 4 |
Sources (Detail)
| Source | Url |
|---|---|
| CONFIRM | https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1862933 https://usn.ubuntu.com/4315-1/ |
| UBUNTU | https://usn.ubuntu.com/4315-2/ |
Alert History
| Date | Informations |
|---|---|
| 2022-10-07 21:27:51 |
|
| 2021-05-04 14:05:45 |
|
| 2021-04-22 03:10:50 |
|
| 2020-06-25 05:22:54 |
|
| 2020-05-23 02:40:57 |
|
