CyberSecBulletin
CVE-2024-36048NVD status: Modified

qt_network_authorization: Incorrect Usage of Seeds in Pseudo-Random Number Generator (PRNG)

Published Updated By the CyberSecBulletin desk

CVE-2024-36048 is a critical-severity incorrect usage of seeds in pseudo-random number generator (PRNG) vulnerability in qt_network_authorization from Qt, with a CVSS 3.1 base score of 9.8 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 5.15.17, 6.2.13, 6.5.6 as the first without the flaw, so updating qt_network_authorization to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.97% chance of exploitation within 30 days, higher than 62% of scored CVEs.

Patch this week

Critical severity: a successful attack would have severe impact.

What to do

  1. Update qt_network_authorization to 5.15.17 or 6.2.13 or 6.5.6 or 6.71, whichever matches your release line, or a later version.
  2. Update Qt to 5.15.17 or 6.2.13 or 6.5.6 or 6.7.1, whichever matches your release line, or a later version.
  3. 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
Qtqt_network_authorizationbefore 5.15.17; 6x up to, but not including, 6.2.13; 6.3x through 6.5x; 6.3x up to, but not including, 6.5.6; 6.6x through 6.7x; 6.6x up to, but not including, 6.715.15.17, 6.2.13, 6.5.6, 6.71
QtQtbefore 5.15.17; 6.0.0 up to, but not including, 6.2.13; 6.3.0 up to, but not including, 6.5.6; 6.6.0 up to, but not including, 6.7.15.15.17, 6.2.13, 6.5.6, 6.7.1
Fedora ProjectFedora39; 40Not 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
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:N/UI:N/S:U/C:H/I:H/A:H. Scored by CISA (ADP).

Official description

QAbstractOAuth in Qt Network Authorization in Qt before 5.15.17, 6.x before 6.2.13, 6.3.x through 6.5.x before 6.5.6, and 6.6.x through 6.7.x before 6.7.1 uses only the time to seed the PRNG, which may result in guessable values.

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

The underlying weakness: Incorrect Usage of Seeds in Pseudo-Random Number Generator (PRNG)

The product uses a Pseudo-Random Number Generator (PRNG) but does not correctly manage seeds.

More Incorrect Usage of Seeds in Pseudo-Random Number Generator (PRNG) vulnerabilities (CWE-335)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: poc, automatable: yes, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Recent Incorrect Usage of Seeds in Pseudo-Random Number Generator (PRNG) vulnerabilities

Spotted an error? Tell us.