CVE-2023-30312

Description

An issue discovered in OpenWrt 18.06, 19.07, 21.02, 22.03, and beyond allows off-path attackers to hijack TCP sessions, which could lead to a denial of service, impersonating the client to the server (e.g., for access to files over FTP), and impersonating the server to the client (e.g., to deliver false information from a finance website). This occurs because nf_conntrack_tcp_no_window_check is true by default.

Category

7.3
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.07%
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://openwrt.org/docs/guide-developer/security
https://www.ndss-symposium.org/ndss-paper/exploiting-sequence-number-leakage-tcp-hijacking-in-nat-enabled-wi-fi-networks/
https://blog.apnic.net/2024/06/18/off-path-tcp-hijacking-in-nat-enabled-wi-fi-networks/
https://news.ycombinator.com/item?id=40723150

Frequently Asked Questions

What is the severity of CVE-2023-30312?
CVE-2023-30312 has been scored as a high severity vulnerability.
How to fix CVE-2023-30312?
To fix CVE-2023-30312, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-30312 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-30312 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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