RT-AX88U: Out-of-bounds Read
CVE-2023-34359 is a high-severity out-of-bounds read vulnerability in RT-AX88U from ASUS, 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. Affected RT-AX88U versions: 3.0.0.4.388_22525-gd35b8fe and earlier. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.81% chance of exploitation within 30 days, higher than 58% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Rt-ax88u Firmware to 3.0.0.4.388.23748 or a later version.
- 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 |
|---|---|---|---|
| ASUS | RT-AX88U | 3.0.0.4.388_22525-gd35b8fe and earlier | Not stated |
| ASUS | Rt-ax88u Firmware | before 3.0.0.4.388.23748 | 3.0.0.4.388.23748 |
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
- 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 CNA (cert.org.tw).
Official description
ASUS RT-AX88U's httpd is subject to an unauthenticated DoS condition. A remote attacker can send a specially crafted request to the device which causes the httpd binary to crash within the "do_json_decode()" function of ej.c, resulting in a DoS condition.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Out-of-bounds Read
The product reads data past the end, or before the beginning, of the intended buffer.
How developers prevent this class of flaw
- Use a language that provides appropriate memory abstractions.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- twcert.org.tw/tw/cp-132-7280-bea85-1.htmlThird Party Advisory
Other vulnerabilities in RT-AX88U
- 7.2 High severity
- 7.2 High severity
- 8.8 High severity
- 7.5 High severity
- 7.5 High severity
Recent Out-of-bounds Read vulnerabilities
- 9.8 Critical severity
- 8.1 High severity
- 9.1 Critical severity
- 9.1 Critical severity
- 9.1 Critical severity
- 9.8 Critical severity
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