CyberSecBulletin
CVE-2024-48867NVD status: Analyzed

QTS: Improper Neutralization of CRLF Sequences

Published Updated By the CyberSecBulletin desk

CVE-2024-48867 is a high-severity improper neutralization of CRLF sequences 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 5.1.9.2954 build 20241120, 5.2.2.2950 build 20241114 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 0.48% 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 5.1.9.2954 build 20241120 or 5.2.2.2950 build 20241114, whichever matches your release line, or a later version.
  2. Update QuTS hero to h5.1.9.2954 build 20241120 or h5.2.2.2952 build 20241116, whichever matches your release line, or a later version.
  3. Read the advisory on qnap.com for workarounds and exact fixed builds.
  4. 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
QNAPQTS5.1.x up to, but not including, 5.1.9.2954 build 20241120; 5.2.x up to, but not including, 5.2.2.2950 build 202411145.1.9.2954 build 20241120, 5.2.2.2950 build 20241114
QNAPQuTS heroh5.1.x up to, but not including, h5.1.9.2954 build 20241120; h5.2.x up to, but not including, h5.2.2.2952 build 20241116h5.1.9.2954 build 20241120, h5.2.2.2952 build 20241116

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
HighData or code can be modified at will.
Availability
NoneAvailability is not affected.

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

Scoring systemScoreSeverityScored by
CVSS 4.05.3MediumCNA (qnapsecurity.com.tw)
CVSS 3.17.5HighNVD

Official description

An improper neutralization of CRLF sequences ('CRLF Injection') vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow remote attackers to modify application data. We have already fixed the vulnerability in the following versions: QTS 5.1.9.2954 build 20241120 and later QTS 5.2.2.2950 build 20241114 and later QuTS hero h5.1.9.2954 build 20241120 and later QuTS hero h5.2.2.2952 build 20241116 and later

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

The underlying weakness: Improper Neutralization of CRLF Sequences

The product uses CRLF (carriage return line feeds) as a special element, e.g. to separate lines or records, but it does not neutralize or incorrectly neutralizes CRLF sequences from inputs.

How developers prevent this class of flaw

  • Appropriately filter or quote CRLF sequences in user-controlled input.

More Improper Neutralization of CRLF Sequences vulnerabilities (CWE-93)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: partial).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in QTS

All QTS vulnerabilities

Recent Improper Neutralization of CRLF Sequences vulnerabilities

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