CVE-2021-43411
CVSS V2 High 8.5
CVSS V3 High 7.5
Description
An issue was discovered in GNU Hurd before 0.9 20210404-9. When trying to exec a setuid executable, there's a window of time when the process already has the new privileges, but still refers to the old task and is accessible through the old process port. This can be exploited to get full root access.
Overview
- CVE ID
- CVE-2021-43411
- Assigner
- cve@mitre.org
- Vulnerability Status
- Analyzed
- Published Version
- 2021-11-07T18:15:07
- Last Modified Date
- 2022-07-12T17:42:04
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:gnu:hurd:*:*:*:*:*:*:*:* | 1 | OR | 0.9.20210404-9 |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:M/Au:S/C:C/I:C/A:C
- Access Vector
- NETWORK
- Access Compatibility
- MEDIUM
- Authentication
- SINGLE
- Confidentiality Impact
- COMPLETE
- Integrity Impact
- COMPLETE
- Availability Impact
- COMPLETE
- Base Score
- 8.5
- Severity
- HIGH
- Exploitability Score
- 6.8
- Impact Score
- 10
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- Attack Vector
- NETWORK
- Attack Compatibility
- HIGH
- Privileges Required
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- HIGH
- Base Score
- 7.5
- Base Severity
- HIGH
- Exploitability Score
- 1.6
- Impact Score
- 5.9
References
| Reference URL | Reference Tags |
|---|---|
| https://salsa.debian.org/hurd-team/hurd/-/blob/4d1b079411e2f40576e7b58f9b5b78f733a2beda/debian/patches/0034-proc-Use-UIDs-for-evaluating-permissions.patch | Mailing List Patch Third Party Advisory |
| https://lists.gnu.org/archive/html/bug-hurd/2021-05/msg00079.html | Exploit Mailing List Vendor Advisory |
| https://www.mail-archive.com/bug-hurd@gnu.org/msg32112.html | Exploit Vendor Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-43411 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43411 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 06:47:45 | Added to TrackCVE | |||
| 2022-12-05 14:00:09 | 2021-11-07T18:15Z | 2021-11-07T18:15:07 | CVE Published Date | updated |
| 2022-12-05 14:00:09 | 2022-07-12T17:42:04 | CVE Modified Date | updated | |
| 2022-12-05 14:00:09 | Analyzed | Vulnerability Status | updated |