CVE-2021-35939
Published: August 31, 2023Last modified: August 31, 2023
Description
It was found that the fix for CVE-2017-7500 and CVE-2017-7501 was incomplete: the check was only implemented for the parent directory of the file to be created. A local unprivileged user who owns another ancestor directory could potentially use this flaw to gain root privileges. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 6.7 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | HIGH |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | HIGH |
| Integrity impact | HIGH |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | rpm | Not affected (4.18.0-r2) |
| Stream | rpm | Not affected (4.18.1-r0) |
References
- https://access.redhat.com/security/cve/CVE-2021-35939
- https://bugzilla.redhat.com/show_bug.cgi?id=1964129
- https://github.com/rpm-software-management/rpm/commit/96ec957e281220f8e137a2d5eb23b83a6377d556
- https://github.com/rpm-software-management/rpm/pull/1919
- https://rpm.org/wiki/Releases/4.18.0
- https://security.gentoo.org/glsa/202210-22