SUSE Linux Enterprise Server for SAP 15: Incorrect Default Permissions
CVE-2022-31254 is a high-severity incorrect default permissions vulnerability in SUSE Linux Enterprise Server for SAP 15 from SUSE, with a CVSS 3.1 base score of 7.8 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, without any action from a user. The record lists version 2.10 as the first without the flaw, so updating SUSE Linux Enterprise Server for SAP 15 to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.25% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update SUSE Linux Enterprise Server for SAP 15 to 2.10 or a later version.
- Update SUSE Linux Enterprise Server for SAP 15-SP1 to 2.10 or a later version.
- Update SUSE Manager Server 4.1 to 2.10 or a later version.
- Read the advisory on bugzilla.suse.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| SUSE | SUSE Linux Enterprise Server for SAP 15 | rmt-server up to, but not including, 2.10 | 2.10 |
| SUSE | SUSE Linux Enterprise Server for SAP 15-SP1 | rmt-server up to, but not including, 2.10 | 2.10 |
| SUSE | SUSE Manager Server 4.1 | rmt-server up to, but not including, 2.10 | 2.10 |
| openSUSE | openSUSE Leap 15.3 | rmt-server up to, but not including, 2.10 | 2.10 |
| openSUSE | openSUSE Leap 15.4 | rmt-server up to, but not including, 2.10 | 2.10 |
| openSUSE | Rmt-server | before 2.10 | 2.10 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- LocalThe attacker needs local access or must trick a user into running something.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.8 | High | CNA (suse.de) |
| CVSS 3.1 | 7.8 | High | NVD |
Official description
A Incorrect Default Permissions vulnerability in rmt-server-regsharing service of SUSE Linux Enterprise Server for SAP 15, SUSE Linux Enterprise Server for SAP 15-SP1, SUSE Manager Server 4.1; openSUSE Leap 15.3, openSUSE Leap 15.4 allows local attackers with access to the _rmt user to escalate to root. This issue affects: SUSE Linux Enterprise Server for SAP 15 rmt-server versions prior to 2.10. SUSE Linux Enterprise Server for SAP 15-SP1 rmt-server versions prior to 2.10. SUSE Manager Server 4.1 rmt-server versions prior to 2.10. openSUSE Leap 15.3 rmt-server versions prior to 2.10. openSUSE Leap 15.4 rmt-server versions prior to 2.10.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Incorrect Default Permissions
During installation, installed file permissions are set to allow anyone to modify those files.
How developers prevent this class of flaw
- The architecture needs to access and modification attributes for files to only those users who actually require those actions.
- Compartmentalize the system to have safe areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area. Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.
More Incorrect Default Permissions vulnerabilities (CWE-276)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: poc, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Advisories
- bugzilla.suse.com/show_bug.cgi?id=1204285Exploit, Issue Tracking
Recent Incorrect Default Permissions vulnerabilities
- 7.8 High severity
- 7.8 High severity
- 7.8 High severity
- 8.8 High severity
- 7.8 High severity
- 8.1 High severity
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