CyberSecBulletin
CVE-2023-39222NVD status: Modified

ACERA 1320: Improper Neutralization of Special Elements used in an OS Command

Published Updated By the CyberSecBulletin desk

CVE-2023-39222 is a high-severity improper neutralization of special elements used in an OS command vulnerability in ACERA 1320 from FURUNO SYSTEMS, with a CVSS 3.1 base score of 8.8 out of 10. It can be exploited remotely over the network by an attacker with a low-privileged account, without any action from a user. Affected ACERA 1320 versions: firmware ver.01.26 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 1.52% chance of exploitation within 30 days, higher than 75% of scored CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Check which version of ACERA 1320 you run against the affected versions below, and install the vendor's latest release.
  2. Read the advisory on furunosystems.co.jp for workarounds and exact fixed builds.

Affected products and versions

VendorProductAffected versionsFixed in
FURUNO SYSTEMSACERA 1320firmware ver.01.26 and earlierNot stated
FURUNO SYSTEMSACERA 1310firmware ver.01.26 and earlierNot stated
FURUNO SYSTEMSACERA 1210firmware ver.02.36 and earlierNot stated
FURUNO SYSTEMSACERA 1150ifirmware ver.01.35 and earlierNot stated
FURUNO SYSTEMSACERA 1150wfirmware ver.01.35 and earlierNot stated
FURUNO SYSTEMSACERA 1110firmware ver.01.76 and earlierNot stated
FURUNO SYSTEMSACERA 1020firmware ver.01.86 and earlierNot stated
FURUNO SYSTEMSACERA 1010firmware ver.01.86 and earlierNot stated
FURUNO SYSTEMSACERA 950firmware ver.01.60 and earlierNot stated
FURUNO SYSTEMSACERA 850Ffirmware ver.01.60 and earlierNot stated
FURUNO SYSTEMSACERA 900firmware ver.02.54 and earlierNot stated
FURUNO SYSTEMSACERA 850Mfirmware ver.02.06 and earlierNot stated
FURUNO SYSTEMSACERA 810firmware ver.03.74 and earlierNot stated
FURUNO SYSTEMSACERA 800STfirmware ver.07.35 and earlierNot stated
FurunosystemsAcera 1310 Firmware01.26 and earlierNot stated
FurunosystemsAcera 1320 Firmware01.26 and earlierNot stated
FurunosystemsAcera 1210 Firmware02.36 and earlierNot stated
FurunosystemsAcera 1150i Firmware01.35 and earlierNot stated
FurunosystemsAcera 1150w Firmware01.35 and earlierNot stated
FurunosystemsAcera 1110 Firmware01.76 and earlierNot stated
FurunosystemsAcera 1020 Firmware01.86 and earlierNot stated
FurunosystemsAcera 1010 Firmware01.86 and earlierNot stated
FurunosystemsAcera 950 Firmware01.60 and earlierNot stated
FurunosystemsAcera 850f Firmware01.60 and earlierNot stated
FurunosystemsAcera 900 Firmware02.54 and earlierNot stated

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
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:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.

Official description

OS command injection vulnerability in FURUNO SYSTEMS wireless LAN access point devices allows an authenticated user to execute an arbitrary OS command that is not intended to be executed from the web interface by sending a specially crafted request. Affected products and versions are as follows: ACERA 1320 firmware ver.01.26 and earlier, ACERA 1310 firmware ver.01.26 and earlier, ACERA 1210 firmware ver.02.36 and earlier, ACERA 1150i firmware ver.01.35 and earlier, ACERA 1150w firmware ver.01.35 and earlier, ACERA 1110 firmware ver.01.76 and earlier, ACERA 1020 firmware ver.01.86 and earlier, ACERA 1010 firmware ver.01.86 and earlier, ACERA 950 firmware ver.01.60 and earlier, ACERA 850F firmware ver.01.60 and earlier, ACERA 900 firmware ver.02.54 and earlier, ACERA 850M firmware ver.02.06 and earlier, ACERA 810 firmware ver.03.74 and earlier, and ACERA 800ST firmware ver.07.35 and earlier. They are affected when running in ST(Standalone) mode.

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. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Third-party and government advisories

Other vulnerabilities in ACERA 1320

All ACERA 1320 vulnerabilities

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

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