CyberSecBulletin
CVE-2024-52331NVD status: Modified

Unspecified robots: Use of a Broken or Risky Cryptographic Algorithm

Published Updated By the CyberSecBulletin desk

CVE-2024-52331 is a high-severity use of a broken or risky cryptographic algorithm vulnerability in Unspecified robots from Ecovacs, 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, but only if a user takes part, for example by opening a link or file. There is no confirmed exploitation so far. EPSS estimates a 0.22% 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. Check which version of Unspecified robots 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.
  3. Because the attack needs a user to take part, warn users about unexpected links and files related to this product until it is patched.

Affected products and versions

VendorProductAffected versionsFixed in
ECOVACSUnspecified robotsNot specified in the recordNot stated
EcovacsDeebot 900 FirmwareNot specified in the recordNot stated
EcovacsDeebot N8 FirmwareNot specified in the recordNot stated
EcovacsDeebot T8 FirmwareNot specified in the recordNot stated
EcovacsDeebot N9 FirmwareNot specified in the recordNot stated
EcovacsDeebot T9 FirmwareNot specified in the recordNot stated
EcovacsDeebot N10 FirmwareNot specified in the recordNot stated
EcovacsDeebot T10 FirmwareNot specified in the recordNot stated
EcovacsDeebot X1 FirmwareNot specified in the recordNot stated
EcovacsDeebot T20 FirmwareNot specified in the recordNot stated
EcovacsDeebot X2 FirmwareNot specified in the recordNot stated
EcovacsGoat G1 FirmwareNot specified in the recordNot stated
EcovacsAirbot Z1 FirmwareNot specified in the recordNot stated
EcovacsAirbot Ava FirmwareNot specified in the recordNot stated
EcovacsAirbot Andy 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
HighSuccess depends on conditions outside the attacker's control.
Privileges required
NoneNo account or login is needed.
User interaction
RequiredA user must take an action such as opening a file or link.
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:H/PR:N/UI:R/S:U/C:H/I:H/A:H. Scored by CNA.

Scoring systemScoreSeverityScored by
CVSS 4.07.7HighCNA
CVSS 3.17.5HighCNA

Official description

ECOVACS robot lawnmowers and vacuums use a deterministic symmetric key to decrypt firmware updates. An attacker can create and encrypt malicious firmware that will be successfully decrypted and installed by the robot.

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

The underlying weakness: Use of a Broken or Risky Cryptographic Algorithm

The product uses a broken or risky cryptographic algorithm or protocol.

How developers prevent this class of flaw

  • Ensure that the design allows one cryptographic algorithm to be replaced with another in the next generation or version. Where possible, use wrappers to make the interfaces uniform. This will make it easier to upgrade to stronger algorithms. With hardware, design the product at the Intellectual Property (IP) level so that one cryptographic algorithm can be replaced with another in the next generation of the hardware product.
  • Carefully manage and protect cryptographic keys (see CWE-320). If the keys can be guessed or stolen, then the strength of the cryptography itself is irrelevant.
  • Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. Industry-standard implementations will save development time and may be more likely to avoid errors that can occur during implementation of cryptographic algorithms. Consider the ESAPI Encryption feature.

More Use of a Broken or Risky Cryptographic Algorithm vulnerabilities (CWE-327)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: poc, automatable: no, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Technical write-ups (may include proof of concept)

Other vulnerabilities in Unspecified robots

All Unspecified robots vulnerabilities

Recent Use of a Broken or Risky Cryptographic Algorithm vulnerabilities

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