CyberSecBulletin
CVE-2023-50868NVD status: Analyzed

Hci Baseboard Management Controller: Uncontrolled Resource Consumption

Published Updated By the CyberSecBulletin desk

CVE-2023-50868 is a high-severity uncontrolled resource consumption vulnerability in Hci Baseboard Management Controller from NetApp, 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 74.3% chance of exploitation within 30 days, which is in the top 0.5% of all scored CVEs.

Patch now

Exploitation in the next 30 days is more likely than not, according to EPSS.

What to do

  1. Update Recursor to 4.8.5 or 4.9.3 or 5.0.2, whichever matches your release line, or a later version.
  2. Update Bind to 9.16.48 or 9.18.24 or 9.19.21, whichever matches your release line, or a later version.
  3. Read the advisory on access.redhat.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
NetAppHci Baseboard Management ControllerNot specified in the recordNot stated
NetAppActive Iq Unified ManagerNot specified in the recordNot stated
NetAppBootstrap OSNot specified in the recordNot stated
PowerdnsRecursorbefore 4.8.5; 4.9.0 up to, but not including, 4.9.3; 5.0.0 up to, but not including, 5.0.24.8.5, 4.9.3, 5.0.2
Red HatEnterprise Linux6.0; 7.0; 8.0; 8.2; 8.4Not stated
DebianDebian Linux10.0; 11.0Not stated
Fedora ProjectFedora38; 39Not stated
ISCBind9.0.0 up to, but not including, 9.16.48; 9.9.3 up to, but not including, 9.16.48; 9.18.0 up to, but not including, 9.18.24; 9.18.11 up to, but not including, 9.18.24; 9.19.0 up to, but not including, 9.19.219.16.48, 9.18.24, 9.19.21

Version data comes from NVD's product matching. 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 3.17.5HighNVD
CVSS 3.17.5HighCISA (ADP)

Official description

The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance is skipped) allows remote attackers to cause a denial of service (CPU consumption for SHA-1 computations) via DNSSEC responses in a random subdomain attack, aka the "NSEC3" issue. The RFC 5155 specification implies that an algorithm must perform thousands of iterations of a hash function in certain situations.

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: yes, technical impact: partial).
  3. Record last changed materially (score, affected products, status or references).

References

Advisories

Third-party and government advisories

Other vulnerabilities in Hci Baseboard Management Controller

All Hci Baseboard Management Controller vulnerabilities

Recent Uncontrolled Resource Consumption vulnerabilities

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