Buffer overflow in Opennds
CVE-2023-41101
An issue was discovered in the captive portal in OpenNDS before version 10.1.3. get_query in http_microhttpd.c does not validate the length of the query string of GET requests. This leads to a stack-based buffer overflow in versions 9.x and earlier, and to a heap-based buffer overflow in versions 10.x and later. Attackers may exploit the issue to crash OpenNDS (Denial-of-Service condition) or to inject and execute arbitrary bytecode (Remote Code Execution). Affected OpenNDS before version 10.1.3 fixed in OpenWrt master and OpenWrt 23.05 on 23. November by updating OpenNDS to version 10.2.0.
Vulnerability class: Buffer Overflow
EPSS: 0.019 (77.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Opennds
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Release Notes)
- cve@mitre.org (Patch)
- cve@mitre.org
- cve@mitre.org
Frequently asked questions
- What is CVE-2023-41101?
- CVE-2023-41101 is a critical-severity vulnerability in Opennds, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2023-11-17.
- How severe is CVE-2023-41101?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2023-41101 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.