PM23/43: Session Fixation
CVE-2023-3711 is a high-severity session fixation vulnerability in PM23/43 from Honeywell, with a CVSS 3.1 base score of 8.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, but only if a user takes part, for example by opening a link or file. The record lists version P10.19.050004 as the first without the flaw, so updating PM23/43 to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 1.03% chance of exploitation within 30 days, higher than 64% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update PM23/43 to P10.19.050004 or a later version.
- Update PC23/43, PD43 to K10.19.050004 or a later version.
- Update PM42 to T10.19.050004 or L10.19.050004, whichever matches your release line, or a later version.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
- Because the attack needs a user to take part, warn users about unexpected links and files related to this product until it is patched.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Honeywell | PM23/43 | before P10.19.050004 | P10.19.050004 |
| Honeywell | PC23/43, PD43 | before K10.19.050004 | K10.19.050004 |
| Honeywell | PM42 | before T10.19.050004; before L10.19.050004 | T10.19.050004, L10.19.050004 |
| Honeywell | PX4ie/6ie | before A10.19.050004 | A10.19.050004 |
| Honeywell | PX45/65 | before B10.19.050004 | B10.19.050004 |
| Honeywell | PD45, PX240 | before F10.19.050004 | F10.19.050004 |
| Honeywell | PX940 | before H10.19.050004 | H10.19.050004 |
| Honeywell | PM45 | before J10.19.050004 | J10.19.050004 |
| Honeywell | RP2f/RP4f | before M10.19.050006 | M10.19.050006 |
| Honeywell | Pm43 Firmware | before p10.19.050004 | p10.19.050004 |
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
- RequiredA user must take an action such as opening a file or link.
- 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:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 6.4 | Medium | CNA (honeywell.com) |
| CVSS 3.1 | 8.8 | High | NVD |
Official description
Session Fixation vulnerability in Honeywell PM43 on 32 bit, ARM (Printer web page modules) allows Session Credential Falsification through Prediction.This issue affects PM43 versions prior to P10.19.050004. Update to the latest available firmware version of the respective printers to version MR19.5 (e.g. P10.19.050006).
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Session Fixation
Authenticating a user, or otherwise establishing a new user session, without invalidating any existing session identifier gives an attacker the opportunity to steal authenticated sessions.
How developers prevent this class of flaw
- Invalidate any existing session identifiers prior to authorizing a new user session.
- For platforms such as ASP that do not generate new values for sessionid cookies, utilize a secondary cookie. In this approach, set a secondary cookie on the user's browser to a random value and set a session variable to the same value. If the session variable and the cookie value ever don't match, invalidate the session, and force the user to log on again.
- Use an application firewall that can detect attacks against this weakness. It can be beneficial in cases in which the code cannot be fixed (because it is controlled by a third party), as an emergency prevention measure while more comprehensive software assurance measures are applied, or to provide defense in depth.
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 references
- hsmftp.honeywell.com:443/en/Software/Printers/Industrial/PM23-PM23c-PM43-PM43c/Current/Firmware/firmwaresigne…Permissions Required
- hsmftp.honeywell.com:443/en/Software/Printers/Industrial/PM23-PM23c-PM43-PM43c/Current/Firmware/firmwarexasig…Permissions Required
- honeywell.com/us/en/product-securityProduct
Other vulnerabilities in PM23/43
- 7.8 High severity
- 9.8 Critical severity
Recent Session Fixation vulnerabilities
- 9.8 Critical severity
- 8.0 High severity
- 7.0 High severity
- 8.8 High severity
- 7.5 High severity
- 9.8 Critical severity
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