CVE-2017-1000383
Description
It was found that emacs applies the opened file read permissions to the swap file, overriding the process' umask. An attacker might search for vim swap files, that were not deleted properly, in order to retrieve sensible data.
Statement
This flaw is an incorrect permission assignment, where the application ignores the user's umask setting when creating a backup file (e.g., filename~).This behavior is triggered during normal file-saving operations. On a multi-user system, this could allow an unprivileged local user to read the contents of backup files created by other users. This results in a low-impact information disclosure of the file's previous contents, the practical impact is limited to these specific shared-environment scenarios and does not allow an attacker to modify data or execute code.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 5.5 | 5.5 | N/A |
| Attack Vector | Local | Local | N/A |
| Attack Complexity | Low | Low | N/A |
| Privileges Required | Low | Low | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | High | High | N/A |
| Integrity Impact | None | None | N/A |
| Availability Impact | None | None | N/A |
Vector
Red Hat: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Understanding the Weakness (CWE)
Access Control
Technical Impact: Gain Privileges or Assume Identity
A user can access restricted functionality and/or sensitive information that may include administrative functionality and user accounts.
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