The path autocompletion feature in Bash 4.4 allows local users to gain privileges via a crafted filename starting with a " (double quote) character and a command substitution metacharacter.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2017-5932 from the MITRE CVE dictionary dictionary and NIST NVD.
This issue did not affect the versions of bash as shipped with Red Hat Enterprise Linux as they did not include the commit which introduced it.
NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.
| CVSS3 Base Score | 7.8 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| Attack Vector | Local |
| Attack Complexity | Low |
| Privileges Required | None |
| User Interaction | Required |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity Impact | High |
| Availability Impact | High |
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 7 | bash | Not affected |
| Red Hat Enterprise Linux 6 | bash | Not affected |
| Red Hat Enterprise Linux 5 | bash | Not affected |
Vulmon