Mitsubishi Electric MELSEC iQ-F series FX5U(C)…: Authentication Bypass by Capture-replay
CVE-2022-25159 is a high-severity authentication bypass by capture-replay vulnerability in Mitsubishi Electric MELSEC iQ-F series FX5U(C) CPU; Mitsubishi Electric MELSEC iQ-F series FX5UJ CPU; Mitsubishi Electric MELSEC iQ-R series R00/01/02CPU; Mitsubishi Electric MELSEC iQ-R series R04/08/16/32/120(EN)CPU; Mitsubishi Electric MELSEC iQ-R series R08/16/32/120SFCPU; Mitsubishi Electric MELSEC iQ-R series R08/16/32/120PCPU; Mitsubishi Electric MELSEC iQ-R series R08/16/32/120PSFCPU; Mitsubishi Electric MELSEC iQ-R series R16/32/64MTCPU; Mitsubishi Electric MELSEC iQ-R series RJ71C24(-R2/R4); Mitsubishi Electric MELSEC iQ-R series RJ71EN71; Mitsubishi Electric MELSEC iQ-R series RJ72GF15-T2; Mitsubishi Electric MELSEC Q series Q03/04/06/13/26UDVCPU; Mitsubishi Electric MELSEC Q series Q04/06/13/26UDPVCPU; Mitsubishi Electric MELSEC Q series QJ71C24N(-R2/R4); Mitsubishi Electric MELSEC Q series QJ71E71-100, with a CVSS 3.1 base score of 8.1 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected Mitsubishi Electric MELSEC iQ-F series FX5U(C) CPU; Mitsubishi Electric MELSEC iQ-F series FX5UJ CPU; Mitsubishi Electric MELSEC iQ-R series R00/01/02CPU; Mitsubishi Electric MELSEC iQ-R series R04/08/16/32/120(EN)CPU; Mitsubishi Electric MELSEC iQ-R series R08/16/32/120SFCPU; Mitsubishi Electric MELSEC iQ-R series R08/16/32/120PCPU; Mitsubishi Electric MELSEC iQ-R series R08/16/32/120PSFCPU; Mitsubishi Electric MELSEC iQ-R series R16/32/64MTCPU; Mitsubishi Electric MELSEC iQ-R series RJ71C24(-R2/R4); Mitsubishi Electric MELSEC iQ-R series RJ71EN71; Mitsubishi Electric MELSEC iQ-R series RJ72GF15-T2; Mitsubishi Electric MELSEC Q series Q03/04/06/13/26UDVCPU; Mitsubishi Electric MELSEC Q series Q04/06/13/26UDPVCPU; Mitsubishi Electric MELSEC Q series QJ71C24N(-R2/R4); Mitsubishi Electric MELSEC Q series QJ71E71-100 versions: Mitsubishi Electric MELSEC iQ-R series RJ71EN71 all versions; Mitsubishi Electric MELSEC Q series QJ71E71-100 all versions. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 2.15% chance of exploitation within 30 days, higher than 82% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of Mitsubishi Electric MELSEC iQ-F series FX5U(C) CPU; Mitsubishi Electric MELSEC iQ-F series FX5UJ CPU; Mitsubishi Electric MELSEC iQ-R series R00/01/02CPU; Mitsubishi Electric MELSEC iQ-R series R04/08/16/32/120(EN)CPU; Mitsubishi Electric MELSEC iQ-R series R08/16/32/120SFCPU; Mitsubishi Electric MELSEC iQ-R series R08/16/32/120PCPU; Mitsubishi Electric MELSEC iQ-R series R08/16/32/120PSFCPU; Mitsubishi Electric MELSEC iQ-R series R16/32/64MTCPU; Mitsubishi Electric MELSEC iQ-R series RJ71C24(-R2/R4); Mitsubishi Electric MELSEC iQ-R series RJ71EN71; Mitsubishi Electric MELSEC iQ-R series RJ72GF15-T2; Mitsubishi Electric MELSEC Q series Q03/04/06/13/26UDVCPU; Mitsubishi Electric MELSEC Q series Q04/06/13/26UDPVCPU; Mitsubishi Electric MELSEC Q series QJ71C24N(-R2/R4); Mitsubishi Electric MELSEC Q series QJ71E71-100 you run against the affected versions below, and install the vendor's latest release.
- Read the advisory on mitsubishielectric.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
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
- HighSuccess depends on conditions outside the attacker's control.
- 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
- 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:H/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 8.1 | High | NVD |
| CVSS 2.0 | 6.8 | Medium | NVD |
Official description
Authentication Bypass by Capture-replay vulnerability in Mitsubishi Electric MELSEC iQ-F series FX5U(C) CPU all versions, Mitsubishi Electric MELSEC iQ-F series FX5UJ CPU all versions, Mitsubishi Electric MELSEC iQ-R series R00/01/02CPU all versions, Mitsubishi Electric MELSEC iQ-R series R04/08/16/32/120(EN)CPU all versions, Mitsubishi Electric MELSEC iQ-R series R08/16/32/120SFCPU all versions, Mitsubishi Electric MELSEC iQ-R series R08/16/32/120PCPU all versions, Mitsubishi Electric MELSEC iQ-R series R08/16/32/120PSFCPU all versions, Mitsubishi Electric MELSEC iQ-R series R16/32/64MTCPU all versions, Mitsubishi Electric MELSEC iQ-R series RJ71C24(-R2/R4) all versions, Mitsubishi Electric MELSEC iQ-R series RJ71EN71 all versions, Mitsubishi Electric MELSEC iQ-R series RJ72GF15-T2 all versions, Mitsubishi Electric MELSEC Q series Q03/04/06/13/26UDVCPU all versions, Mitsubishi Electric MELSEC Q series Q04/06/13/26UDPVCPU all versions, Mitsubishi Electric MELSEC Q series QJ71C24N(-R2/R4) all versions and Mitsubishi Electric MELSEC Q series QJ71E71-100 all versions allows a remote unauthenticated attacker to login to the product by replay attack.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Authentication Bypass by Capture-replay
A capture-replay flaw exists when the design of the product makes it possible for a malicious user to sniff network traffic and bypass authentication by replaying it to the server in question to the same effect as the original message (or with minor changes).
How developers prevent this class of flaw
- Utilize some sequence or time stamping functionality along with a checksum which takes this into account in order to ensure that messages can be parsed only once.
- Since any attacker who can listen to traffic can see sequence numbers, it is necessary to sign messages with some kind of cryptography to ensure that sequence numbers are not simply doctored along with content.
More Authentication Bypass by Capture-replay vulnerabilities (CWE-294)
Timeline
- CVE record published.
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- jvn.jp/vu/JVNVU96577897/index.htmlThird Party Advisory
- cisa.gov/uscert/ics/advisories/icsa-22-090-04Third Party Advisory, US Government Resource
Other vulnerabilities in Mitsubishi Electric MELSEC iQ-F series FX5U(C) CPU; Mitsubishi Electric MELSEC iQ-F series FX5UJ CPU; Mitsubishi Electric MELSEC iQ-R series R00/01/02CPU; Mitsubishi Electric MELSEC iQ-R series R04/08/16/32/120(EN)CPU; Mitsubishi Electric MELSEC iQ-R series R08/16/32/120SFCPU; Mitsubishi Electric MELSEC iQ-R series R08/16/32/120PCPU; Mitsubishi Electric MELSEC iQ-R series R08/16/32/120PSFCPU; Mitsubishi Electric MELSEC iQ-R series R16/32/64MTCPU; Mitsubishi Electric MELSEC iQ-R series RJ71C24(-R2/R4); Mitsubishi Electric MELSEC iQ-R series RJ71EN71; Mitsubishi Electric MELSEC iQ-R series RJ72GF15-T2; Mitsubishi Electric MELSEC Q series Q03/04/06/13/26UDVCPU; Mitsubishi Electric MELSEC Q series Q04/06/13/26UDPVCPU; Mitsubishi Electric MELSEC Q series QJ71C24N(-R2/R4); Mitsubishi Electric MELSEC Q series QJ71E71-100
- 9.1 Critical severity
- 9.1 Critical severity
- 8.1 High severity
- 8.1 High severity
Recent Authentication Bypass by Capture-replay vulnerabilities
- 8.8 High severity
- 9.8 Critical severity
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