Red Hat Enterprise Linux 8: Out-of-bounds Read
CVE-2023-6606 is a high-severity out-of-bounds read vulnerability in Red Hat Enterprise Linux 8 from Red Hat, with a CVSS 3.1 base score of 7.1 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. There is no confirmed exploitation so far. EPSS estimates a 0.53% 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 SIMATIC S7-1500 TM MFP - GNU/Linux subsystem to V1.1 or a later version.
- Update Linux Kernel to 6.7 or a later version.
Affected products and versions
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
- NoneNothing can be modified.
- 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:N/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.1 | High | CNA (redhat.com) |
| CVSS 3.1 | 7.1 | High | NVD |
Official description
An out-of-bounds read vulnerability was found in smbCalcSize in fs/smb/client/netmisc.c in the Linux Kernel. This issue could allow a local attacker to crash the system or leak internal kernel information.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Out-of-bounds Read
The product reads data past the end, or before the beginning, of the intended buffer.
How developers prevent this class of flaw
- Use a language that provides appropriate memory abstractions.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: poc, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- access.redhat.com/errata/RHSA-2024:0723Third Party Advisory
- access.redhat.com/errata/RHSA-2024:0725Third Party Advisory
- access.redhat.com/errata/RHSA-2024:0881Third Party Advisory
- access.redhat.com/errata/RHSA-2024:0897Third Party Advisory
- access.redhat.com/errata/RHSA-2024:1188Third Party Advisory
- access.redhat.com/errata/RHSA-2024:1248Third Party Advisory
- access.redhat.com/errata/RHSA-2024:1404Third Party Advisory
- access.redhat.com/errata/RHSA-2024:2094Third Party Advisory
- access.redhat.com/security/cve/CVE-2023-6606Third Party Advisory
Technical write-ups (may include proof of concept)
- bugzilla.kernel.org/show_bug.cgi?id=218218Exploit, Issue Tracking
- bugzilla.redhat.com/show_bug.cgi?id=2253611Exploit, Issue Tracking
Other references
Other vulnerabilities in Red Hat Enterprise Linux 8
- 7.8 High severity
- 7.5 High severity
- 7.5 High severity
- 7.9 High severity
- 7.3 High severity
- 7.5 High severity
Recent Out-of-bounds Read vulnerabilities
- 7.1 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
- 6.5 Medium severity
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