SIPLUS TIM 1531 IRC: Incorrect Conversion between Numeric Types
CVE-2022-40225 is a high-severity incorrect conversion between numeric types vulnerability in SIPLUS TIM 1531 IRC from Siemens, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists version V2.4.8 as the first without the flaw, so updating SIPLUS TIM 1531 IRC to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.62% chance of exploitation within 30 days, higher than 50% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update SIPLUS TIM 1531 IRC to V2.4.8 or a later version.
- Update TIM 1531 IRC to V2.4.8 or a later version.
- Update Siplus Tim 1531 Irc Firmware to 2.4.8 or a later version.
- Read the advisory on cert-portal.siemens.com for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Siemens | SIPLUS TIM 1531 IRC | before V2.4.8 | V2.4.8 |
| Siemens | TIM 1531 IRC | before V2.4.8 | V2.4.8 |
| Siemens | Siplus Tim 1531 Irc Firmware | before 2.4.8 | 2.4.8 |
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
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- NoneNo data is disclosed.
- Integrity
- NoneNothing can be modified.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 6.9 | Medium | CNA (siemens.com) |
| CVSS 3.1 | 6.5 | Medium | CNA (siemens.com) |
| CVSS 3.1 | 7.5 | High | NVD |
Official description
A vulnerability has been identified in SIPLUS TIM 1531 IRC (6AG1543-1MX00-7XE0) (All versions < V2.4.8), TIM 1531 IRC (6GK7543-1MX00-0XE0) (All versions < V2.4.8). Casting an internal value could lead to floating point exception under certain circumstances. This could allow an attacker to cause a denial of service condition on affected devices.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Incorrect Conversion between Numeric Types
When converting from one data type to another, such as long to integer, data can be omitted or translated in a way that produces unexpected values. If the resulting values are used in a sensitive context, then dangerous behaviors may occur.
How developers prevent this class of flaw
- Avoid making conversion between numeric types. Always check for the allowed ranges.
More Incorrect Conversion between Numeric Types vulnerabilities (CWE-681)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Other vulnerabilities in SIPLUS TIM 1531 IRC
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
Recent Incorrect Conversion between Numeric Types vulnerabilities
- 9.8 Critical severity
- 9.1 Critical severity
- 7.8 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
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