Exploit for Off-by-one Error in F5 Nginx

🗓️ 30 Jun 2022 04:39:58Reported by M507Type

Exploit for Off-by-one Error in F5 Nginx, CVE-2021-23017 PoC. Software intended for academic research & defensive techniques, not for unauthorized use

Reporter	Title	Published	Views	Family All 304
FreeBSD	NGINX -- 1-byte memory overwrite in resolver	25 May 202100:00	–	freebsd
0day.today	nginx 1.20.0 DNS Resolver Off-By-One Heap Write Exploit	27 May 202100:00	–	zdt
0day.today	Nginx 1.20.0 - Denial of Service Exploit	11 Jul 202200:00	–	zdt
IBM Security Bulletins	Security Bulletin: IBM API Connect V5 is impacted by a vulnerability in nginx. (CVE-2021-23017)	25 Aug 202113:37	–	ibm
IBM Security Bulletins	Security Bulletin: Netcool Operations Insight v1.6.8 addresses multiple security vulnerabilities.	11 Apr 202311:47	–	ibm
IBM Security Bulletins	Security Bulletin: Vulnerabilities in the Linux Kernel, Docker, Python, and NGINX affect IBM Spectrum Protect Plus	10 Dec 202118:57	–	ibm
IBM Security Bulletins	Security Bulletin: IBM Watson Machine Learning Accelerator is affected by a vulnerability in Nginx	31 Aug 202101:55	–	ibm
IBM Security Bulletins	Security Bulletin: Multiple vulnerabilities in F5 NGINX Controller affect IBM Cloud Pak for Automation	12 Aug 202122:14	–	ibm
IBM Security Bulletins	Security Bulletin: nginx is vulnerable to CVE-2021-23017 used in IBM Maximo Application Suite - Edge Data Collector Component	1 Mar 202416:12	–	ibm
IBM Security Bulletins	Security Bulletin: IBM Watson Discovery for IBM Cloud Pak for Data affected by vulnerability in Nginx	1 Oct 202106:18	–	ibm

29 Aug 2025 16:33Current

7High risk

Vulners AI Score7

CVSS 26.8

CVSS 3.17.7

EPSS0.52838