SIMATIC S7-1500 TM MFP - GNU/Linux subsystem: Out-of-bounds Read
CVE-2022-47520 is a high-severity out-of-bounds read vulnerability in SIMATIC S7-1500 TM MFP - GNU/Linux subsystem from Siemens, 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. The record lists version V1.1 as the first without the flaw, so updating SIMATIC S7-1500 TM MFP - GNU/Linux subsystem to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.31% 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 5.10.157 or 5.15.81 or 6.0.11, whichever matches your release line, or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Siemens | SIMATIC S7-1500 TM MFP - GNU/Linux subsystem | before V1.1 | V1.1 |
| Linux | Linux Kernel | 4.2.0 up to, but not including, 5.10.157; 5.11 up to, but not including, 5.15.81; 5.16 up to, but not including, 6.0.11 | 5.10.157, 5.15.81, 6.0.11 |
| Debian | Debian Linux | 10.0 | Not stated |
| NetApp | H410c Firmware | Not specified in the record | Not stated |
| NetApp | H300s Firmware | Not specified in the record | Not stated |
| NetApp | H500s Firmware | Not specified in the record | Not stated |
| NetApp | H700s Firmware | Not specified in the record | Not stated |
| NetApp | H410s Firmware | Not specified in the record | Not stated |
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 | NVD |
| CVSS 3.1 | 7.1 | High | CISA (ADP) |
Official description
An issue was discovered in the Linux kernel before 6.0.11. Missing offset validation in drivers/net/wireless/microchip/wilc1000/hif.c in the WILC1000 wireless driver can trigger an out-of-bounds read when parsing a Robust Security Network (RSN) information element from a Netlink packet.
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: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Patches and release notes
- github.com/torvalds/linux/commit/cd21d99e595ec1d8721e1058dcdd4f1f7de1d793Third Party Advisory
Third-party and government advisories
- lists.debian.org/debian-lts-announce/2022/12/msg00031.htmlMailing List, Third Party Advisory
- security.netapp.com/advisory/ntap-20230113-0007/Third Party Advisory
Other references
Other vulnerabilities in SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
- 7.8 High severity
- 7.8 High severity
Linux Kernel Unspecified Exploited
- 8.8 High severity
- 7.8 High severity
- 8.8 High severity
- 8.2 High severity
Recent Out-of-bounds Read vulnerabilities
- 7.5 High severity
- 8.8 High severity
- 7.5 High severity
- 9.8 Critical severity
- 7.8 High severity
- 7.8 High severity
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