CyberSecBulletin
CVE-2022-27600NVD status: Analyzed

QTS: Uncontrolled Resource Consumption

Published Updated By the CyberSecBulletin desk

CVE-2022-27600 is a high-severity uncontrolled resource consumption vulnerability in QTS from QNAP, 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. The record lists versions 5.0.1.2277, 4.5.4.2280 build 20230112 as the first without the flaw, so updating QTS to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.59% 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. Update QTS to 5.0.1.2277 or 4.5.4.2280 build 20230112, whichever matches your release line, or a later version.
  2. Update QuTS hero to h5.0.1.2277 build 20230112 or h4.5.4.2374 build 20230417, whichever matches your release line, or a later version.
  3. Update QuTScloud to c5.0.1.2374 or a later version.
  4. Read the advisory on qnap.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
QNAPQTS5.0.x up to, but not including, 5.0.1.2277; 4.5.x up to, but not including, 4.5.4.2280 build 202301125.0.1.2277, 4.5.4.2280 build 20230112
QNAPQuTS heroh5.0.x up to, but not including, h5.0.1.2277 build 20230112; h4.5.x up to, but not including, h4.5.4.2374 build 20230417h5.0.1.2277 build 20230112, h4.5.4.2374 build 20230417
QNAPQuTScloudc5.x.x up to, but not including, c5.0.1.2374c5.0.1.2374

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 3.16.8MediumCNA (qnapsecurity.com.tw)
CVSS 3.17.5HighNVD

Official description

An uncontrolled resource consumption vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow remote attackers to launch a denial-of-service (DoS) attack. We have already fixed the vulnerability in the following versions: QTS 5.0.1.2277 and later QTS 4.5.4.2280 build 20230112 and later QuTS hero h5.0.1.2277 build 20230112 and later QuTS hero h4.5.4.2374 build 20230417 and later QuTScloud c5.0.1.2374 and later

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

The underlying weakness: Uncontrolled Resource Consumption

The product does not properly control the allocation and maintenance of a limited resource.

How developers prevent this class of flaw

  • Ensure that protocols have specific limits of scale placed on them.
  • Ensure that all failures in resource allocation place the system into a safe posture.

More Uncontrolled Resource Consumption vulnerabilities (CWE-400)

Timeline

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

References

Other vulnerabilities in QTS

All QTS vulnerabilities

Recent Uncontrolled Resource Consumption vulnerabilities

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