CyberSecBulletin
CVE-2024-6525NVD status: Modified

DAR-7000: Deserialization of Untrusted Data

Published Updated By the CyberSecBulletin desk

CVE-2024-6525 is a high-severity deserialization of untrusted data vulnerability in DAR-7000 from D-Link, with a CVSS 3.1 base score of 8.8 out of 10. It can be exploited remotely over the network by an attacker with a low-privileged account, without any action from a user. Affected DAR-7000 versions: 20230922. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 3.08% chance of exploitation within 30 days, higher than 88% of scored CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Check which version of DAR-7000 you run against the affected versions below, and install the vendor's latest release.
  2. Read the advisory on supportannouncement.us.dlink.com for workarounds and exact fixed builds.

Affected products and versions

VendorProductAffected versionsFixed in
D-LinkDAR-700020230922Not stated
D-LinkDar-7000 Firmware2023-09-22 and earlierNot 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
LowA basic user account is enough.
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:L/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.

Scoring systemScoreSeverityScored by
CVSS 4.05.1MediumCNA (vuldb.com)
CVSS 3.12.7LowCNA (vuldb.com)
CVSS 3.18.8HighNVD
CVSS 2.03.3LowCNA (vuldb.com)

Official description

** UNSUPPORTED WHEN ASSIGNED ** A vulnerability was found in D-Link DAR-7000 up to 20230922. It has been rated as problematic. Affected by this issue is some unknown functionality of the file /log/decodmail.php. The manipulation of the argument file leads to deserialization. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-270368. NOTE: This vulnerability only affects products that are no longer supported by the maintainer.

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

The underlying weakness: Deserialization of Untrusted Data

The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

How developers prevent this class of flaw

  • If available, use the signing/sealing features of the programming language to assure that deserialized data has not been tainted. For example, a hash-based message authentication code (HMAC) could be used to ensure that data has not been modified.
  • When deserializing data, populate a new object rather than just deserializing. The result is that the data flows through safe input validation and that the functions are safe.
  • Explicitly define a final object() to prevent deserialization.

More Deserialization of Untrusted Data vulnerabilities (CWE-502)

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

Third-party and government advisories

Technical write-ups (may include proof of concept)

Other references

Other vulnerabilities in DAR-7000

All DAR-7000 vulnerabilities

Recent Deserialization of Untrusted Data vulnerabilities

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