Dir-859 A3 Firmware: Improper Authentication
CVE-2024-57045 is a critical-severity improper authentication vulnerability in Dir-859 A3 Firmware from D-Link, 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 version 1.05 as the first without the flaw, so updating Dir-859 A3 Firmware to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 32.2% chance of exploitation within 30 days, which is in the top 1.65% of all scored CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Update Dir-859 A3 Firmware to 1.05 or a later version.
- Read the advisory on dlink.com for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| D-Link | Dir-859 A3 Firmware | before 1.05 | 1.05 |
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
- 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
A vulnerability in the D-Link DIR-859 router with firmware version A3 1.05 and earlier permits unauthorized individuals to bypass the authentication. An attacker can obtain a user name and password by forging a post request to the / getcfg.php page.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Authentication
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
How developers prevent this class of flaw
- Use an authentication framework or library such as the OWASP ESAPI Authentication feature.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: poc, automatable: yes, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Advisories
Technical write-ups (may include proof of concept)
- github.com/Shuanunio/CVE_Requests/blob/main/D-Link/DIR-859/ACL%20bypass%20Vulnerability%20in%20D-Link%20DIR-8…Exploit, Third Party Advisory
Recent Improper Authentication vulnerabilities
- 9.1 Critical severity
- 9.1 Critical severity
- 8.8 High severity
- 7.5 High severity
- 9.8 Critical severity
- 8.8 High severity
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