CyberSecBulletin
CVE-2023-46681NVD status: Modified

VR-S1000: Improper Neutralization of Argument Delimiters in a Command

Published Updated By the CyberSecBulletin desk

CVE-2023-46681 is a high-severity improper neutralization of argument delimiters in a command vulnerability in VR-S1000 from Buffalo, with a CVSS 3.1 base score of 7.8 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. Affected VR-S1000 versions: firmware Ver. 2.37 and earlier. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.25% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Check which version of VR-S1000 you run against the affected versions below, and install the vendor's latest release.
  2. Read the advisory on buffalo.jp for workarounds and exact fixed builds.

Affected products and versions

VendorProductAffected versionsFixed in
BUFFALOVR-S1000firmware Ver. 2.37 and earlierNot stated
BuffaloVr-s1000 Firmware2.37 and earlierNot 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
HighData or code can be modified at will.
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:H/A:H. Scored by NVD.

Official description

Improper neutralization of argument delimiters in a command ('Argument Injection') vulnerability in VR-S1000 firmware Ver. 2.37 and earlier allows an authenticated attacker who can access to the product's command line interface to execute an arbitrary command.

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

The underlying weakness: Improper Neutralization of Argument Delimiters in a Command

The product constructs a string for a command to be executed by a separate component in another control sphere, but it does not properly delimit the intended arguments, options, or switches within that command string.

How developers prevent this class of flaw

  • Understand all the potential areas where untrusted inputs can enter your product: parameters or arguments, cookies, anything read from the network, environment variables, request headers as well as content, URL components, e-mail, files, databases, and any external systems that provide data to the application. Perform input validation at well-defined interfaces.
  • Directly convert your input type into the expected data type, such as using a conversion function that translates a string into a number. After converting to the expected data type, ensure that the input's values fall within the expected range of allowable values and that multi-field consistencies are maintained.
  • When exchanging data between components, ensure that both components are using the same character encoding. Ensure that the proper encoding is applied at each interface. Explicitly set the encoding you are using whenever the protocol allows you to do so.

More Improper Neutralization of Argument Delimiters in a Command vulnerabilities (CWE-88)

Timeline

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

References

Third-party and government advisories

Recent Improper Neutralization of Argument Delimiters in a Command vulnerabilities

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