CVE-2017-20002
CVSS V2 Medium 4.6
CVSS V3 High 7.8
Description
The Debian shadow package before 1:4.5-1 for Shadow incorrectly lists pts/0 and pts/1 as physical terminals in /etc/securetty. This allows local users to login as password-less users even if they are connected by non-physical means such as SSH (hence bypassing PAM's nullok_secure configuration). This notably affects environments such as virtual machines automatically generated with a default blank root password, allowing all local users to escalate privileges.
Overview
- CVE ID
- CVE-2017-20002
- Assigner
- cve@mitre.org
- Vulnerability Status
- Analyzed
- Published Version
- 2021-03-17T06:15:12
- Last Modified Date
- 2021-06-07T14:58:56
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:debian:shadow:4.4:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:L/AC:L/Au:N/C:P/I:P/A:P
- Access Vector
- LOCAL
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- PARTIAL
- Availability Impact
- PARTIAL
- Base Score
- 4.6
- Severity
- MEDIUM
- Exploitability Score
- 3.9
- Impact Score
- 6.4
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Attack Vector
- LOCAL
- Attack Compatibility
- LOW
- Privileges Required
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- HIGH
- Base Score
- 7.8
- Base Severity
- HIGH
- Exploitability Score
- 1.8
- Impact Score
- 5.9
References
| Reference URL | Reference Tags |
|---|---|
| https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=914957 | Exploit Mailing List Vendor Advisory |
| https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=877374 | Mailing List Vendor Advisory |
| https://lists.debian.org/debian-lts-announce/2021/03/msg00020.html | Mailing List Vendor Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2017-20002 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-20002 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 16:12:17 | Added to TrackCVE | |||
| 2022-12-05 23:50:10 | 2021-03-17T06:15Z | 2021-03-17T06:15:12 | CVE Published Date | updated |
| 2022-12-05 23:50:10 | 2021-06-07T14:58:56 | CVE Modified Date | updated | |
| 2022-12-05 23:50:10 | Analyzed | Vulnerability Status | updated |