CyberSecBulletin
CVE-2022-31479NVD status: Modified

LNL-X2210: Improper Neutralization of Special Elements used in an OS Command

Published Updated By the CyberSecBulletin desk

CVE-2022-31479 is a critical-severity improper neutralization of special elements used in an OS command vulnerability in LNL-X2210 from LenelS2, with a CVSS 3.1 base score of 9.8 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 1.302 as the first without the flaw, so updating LNL-X2210 to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 2.44% chance of exploitation within 30 days, higher than 85% of scored CVEs.

Patch this week

Critical severity: a successful attack would have severe impact.

What to do

  1. Update LNL-X2210 to 1.302 or a later version.
  2. Update LNL-X2220 to 1.302 or a later version.
  3. Update LNL-X3300 to 1.302 or a later version.
  4. Read the advisory on corporate.carrier.com for workarounds and exact fixed builds.
  5. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.

Affected products and versions

VendorProductAffected versionsFixed in
LenelS2LNL-X2210ALL up to, but not including, 1.3021.302
LenelS2LNL-X2220ALL up to, but not including, 1.3021.302
LenelS2LNL-X3300ALL up to, but not including, 1.3021.302
LenelS2LNL-X4420ALL up to, but not including, 1.3021.302
LenelS2LNL-4420ALL up to, but not including, 1.2961.296
LenelS2S2-LP-1501ALL up to, but not including, 1.3021.302
LenelS2S2-LP-1502ALL up to, but not including, 1.3021.302
LenelS2S2-LP-2500ALL up to, but not including, 1.3021.302
LenelS2S2-LP-4502ALL up to, but not including, 1.3021.302
HID MercuryLP1501ALL up to, but not including, 1.3021.302
HID MercuryLP1502ALL up to, but not including, 1.3021.302
HID MercuryLP2500ALL up to, but not including, 1.3021.302
HID MercuryLP4502ALL up to, but not including, 1.3021.302
HID MercuryEP4502ALL up to, but not including, 1.2961.296
HidglobalLp1501 Firmwarebefore 1.3021.302
HidglobalLp1502 Firmwarebefore 1.3021.302
HidglobalLp2500 Firmwarebefore 1.3021.302
HidglobalLp4502 Firmwarebefore 1.3021.302
HidglobalEp4502 Firmwarebefore 1.2961.296
CarrierLenels2 Lnl-4420 Firmwarebefore 1.2961.296
CarrierLenels2 Lnl-x2210 Firmwarebefore 1.3021.302
CarrierLenels2 Lnl-x2220 Firmwarebefore 1.3021.302
CarrierLenels2 Lnl-x3300 Firmwarebefore 1.3021.302
CarrierLenels2 Lnl-x4420 Firmwarebefore 1.3021.302
CarrierLenels2 S2-lp-1501 Firmwarebefore 1.3021.302

Version data comes from the organisation that assigned the CVE; 3 further products are omitted here. 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
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:N/S:U/C:H/I:H/A:H. Scored by NVD.

Scoring systemScoreSeverityScored by
CVSS 3.19.6CriticalCNA (carrier.com)
CVSS 3.19.8CriticalNVD
CVSS 2.010.0HighNVD

Official description

An unauthenticated attacker can update the hostname with a specially crafted name that will allow for shell commands to be executed during the core collection process. This vulnerability impacts products based on HID Mercury Intelligent Controllers LP1501, LP1502, LP2500, LP4502, and EP4502 which contain firmware versions prior to 1.302 for the LP series and 1.296 for the EP series. An attacker with this level of access on the device can monitor all communications sent to and from this device, modify onboard relays, change configuration files, or cause the device to become unstable. The injected commands only get executed during start up or when unsafe calls regarding the hostname are used. This allows the attacker to gain remote access to the device and can make their persistence permanent by modifying the filesystem.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Improper Neutralization of Special Elements used in an OS Command

The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command before it is sent to a downstream component.

How developers prevent this class of flaw

  • If at all possible, use library calls rather than external processes to recreate the desired functionality.
  • For any data that will be used to generate a command to be executed, keep as much of that data out of external control as possible. For example, in web applications, this may require storing the data locally in the session's state instead of sending it out to the client in a hidden form field.
  • For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.

More Improper Neutralization of Special Elements used in an OS Command vulnerabilities (CWE-78)

Timeline

  1. CVE record published.
  2. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in LNL-X2210

All LNL-X2210 vulnerabilities

Recent Improper Neutralization of Special Elements used in an OS Command vulnerabilities

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