CyberSecBulletin
CVE-2023-4463NVD status: Modified

CCX 400: Improper Resource Shutdown or Release

Published Updated By the CyberSecBulletin desk

CVE-2023-4463 is a high-severity improper resource shutdown or release vulnerability in CCX 400 from Poly, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. There is no confirmed exploitation so far. EPSS estimates a 1.01% chance of exploitation within 30 days, higher than 64% of scored CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Check which version of CCX 400 you run against the affected versions below, and install the vendor's latest release.
  2. 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
PolyCCX 400Not specified in the recordNot stated
PolyCCX 600Not specified in the recordNot stated
PolyTrio 8800Not specified in the recordNot stated
PolyTrio C60Not specified in the recordNot stated
PolyCcx 400 FirmwareNot specified in the recordNot stated
PolyCcx 600 FirmwareNot specified in the recordNot stated
PolyTrio 8800 FirmwareNot specified in the recordNot stated
PolyTrio C60 FirmwareNot specified in the recordNot 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
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
NoneNo data is disclosed.
Integrity
NoneNothing can be modified.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. Scored by NVD.

Scoring systemScoreSeverityScored by
CVSS 3.15.3MediumCNA (vuldb.com)
CVSS 3.17.5HighNVD
CVSS 2.05.0MediumCNA (vuldb.com)

Official description

A vulnerability classified as problematic was found in Poly CCX 400, CCX 600, Trio 8800 and Trio C60. This vulnerability affects unknown code of the component HTTP Header Handler. The manipulation of the argument Cookie leads to denial of service. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-249256.

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

The underlying weakness: Improper Resource Shutdown or Release

The product does not release or incorrectly releases a resource before it is made available for re-use.

How developers prevent this class of flaw

  • Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. For example, languages such as Java, Ruby, and Lisp perform automatic garbage collection that releases memory for objects that have been deallocated.
  • It is good practice to be responsible for freeing all resources you allocate and to be consistent with how and where you free memory in a function. If you allocate memory that you intend to free upon completion of the function, you must be sure to free the memory at all exit points for that function including error conditions.
  • Memory should be allocated/freed using matching functions such as malloc/free, new/delete, and new[]/delete[].

More Improper Resource Shutdown or Release vulnerabilities (CWE-404)

Timeline

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

References

Third-party and government advisories

Technical write-ups (may include proof of concept)

Other vulnerabilities in CCX 400

All CCX 400 vulnerabilities

Recent Improper Resource Shutdown or Release vulnerabilities

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