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Redos
Redos
added 2026/05/24 12:0 a.m.6 views

ROS-20260524-73-0056

A vulnerability in the ngxresolvercopy function of the nginx server is related to a single offset error resulting from writing a dot character '.', 0x2E outside of the heap buffer. Exploitation of the vulnerability could allow an attacker acting remotely to execute arbitrary code or cause a denia...

7.7CVSS7.7AI score0.52838EPSS
Exploits10
Tenable Nessus
Tenable Nessus
added 2026/01/20 12:0 a.m.7 views

MiracleLinux 8 : nginx:1.20 (AXSA:2022-3028:01)

The remote MiracleLinux 8 host has packages installed that are affected by a vulnerability as referenced in the AXSA:2022-3028:01 advisory. nginx: Off-by-one in ngxresolvercopy when labels are followed by a pointer to a root domain name CVE-2021-23017 Tenable has extracted the preceding descripti...

7.7CVSS8.4AI score0.52838EPSS
Exploits10References2
OSV
OSV
added 2022/02/28 10:2 p.m.2 views

CLSA-2022-1646085758 Fix of CVE: CVE-2021-23017

CVE-2021-23017: Off-by-one in ngxresolvercopy when labels are followed by a pointer to a root domain name...

7.7CVSS7.2AI score0.52838EPSS
Exploits10References1
OSV
OSV
added 2022/02/28 3:4 p.m.7 views

CLSA-2022-1646060645 Fix of CVE: CVE-2021-23017

CVE-2021-23017: Off-by-one in ngxresolvercopy when labels are followed by a pointer to a root domain name...

7.7CVSS7.3AI score0.52838EPSS
Exploits10References1
RedHat Linux
RedHat Linux
added 2022/01/31 10:21 a.m.4 views

nginx: Off-by-one in ngx_resolver_copy() when labels are followed by a pointer to a root domain name

A flaw was found in nginx. An off-by-one error while processing DNS responses allows a network attacker to write a dot character out of bounds in a heap allocated buffer which can allow overwriting the least significant byte of next heap chunk metadata likely leading to a remote code execution in...

7.7CVSS8AI score0.52838EPSS
Exploits10References4
OSV
OSV
added 2021/10/22 5:13 p.m.3 views

CLSA-2021-1634922789 Fixed CVE-2021-23017 in nginx

Fixed CVE-2021-23017 : Off-by-one in ngxresolvercopy when - labels are followed by a pointer to a root domain name...

7.7CVSS7.3AI score0.52838EPSS
Exploits10References1
OSV
OSV
added 2021/09/21 10:2 p.m.3 views

CLSA-2021-1632261741 Fix of CVE: CVE-2021-23017

Fixed CVE-2021-23017 : Off-by-one in ngxresolvercopy when - labels are followed by a pointer to a root domain name...

7.7CVSS7.2AI score0.52838EPSS
Exploits10References1
Redos
Redos
added 2021/09/08 12:0 a.m.6 views

ROS-2-2202

2.2202 Remote code execution in nginxCVE-2021-23017 1. Vulnerability Description: The vulnerability allows a remote attacker to execute arbitrary code on the target system. The vulnerability exists due to a single error in the ngxresolvercopyfunction when processing DNS responses. A remote...

7.7CVSS9.9AI score0.52838EPSS
Exploits10
Redos
Redos
added 2021/09/08 12:0 a.m.8 views

ROS-2-2151

2.2151 Remote code execution in nginxCVE-2021-23017 1. Vulnerability Description: The vulnerability allows a remote attacker to execute arbitrary code on the target system. The vulnerability exists due to a single error in the ngxresolvercopyfunction when processing DNS responses. A remote...

8.1CVSS8.5AI score0.52838EPSS
Exploits11
RedHat Linux
RedHat Linux
added 2021/07/29 5:36 p.m.1 views

nginx: Off-by-one in ngx_resolver_copy() when labels are followed by a pointer to a root domain name

A flaw was found in nginx. An off-by-one error while processing DNS responses allows a network attacker to write a dot character out of bounds in a heap allocated buffer which can allow overwriting the least significant byte of next heap chunk metadata likely leading to a remote code execution in...

7.7CVSS8AI score0.52838EPSS
Exploits10References4
RedHat Linux
RedHat Linux
added 2021/06/07 5:59 p.m.1 views

nginx: Off-by-one in ngx_resolver_copy() when labels are followed by a pointer to a root domain name

A flaw was found in nginx. An off-by-one error while processing DNS responses allows a network attacker to write a dot character out of bounds in a heap allocated buffer which can allow overwriting the least significant byte of next heap chunk metadata likely leading to a remote code execution in...

7.7CVSS8AI score0.52838EPSS
Exploits10References4
RedHat Linux
RedHat Linux
added 2021/06/07 11:23 a.m.8 views

nginx: Off-by-one in ngx_resolver_copy() when labels are followed by a pointer to a root domain name

A flaw was found in nginx. An off-by-one error while processing DNS responses allows a network attacker to write a dot character out of bounds in a heap allocated buffer which can allow overwriting the least significant byte of next heap chunk metadata likely leading to a remote code execution in...

7.7CVSS8AI score0.52838EPSS
Exploits10References4
RedHat Linux
RedHat Linux
added 2021/06/07 7:37 a.m.0 views

nginx: Off-by-one in ngx_resolver_copy() when labels are followed by a pointer to a root domain name

A flaw was found in nginx. An off-by-one error while processing DNS responses allows a network attacker to write a dot character out of bounds in a heap allocated buffer which can allow overwriting the least significant byte of next heap chunk metadata likely leading to a remote code execution in...

7.7CVSS8AI score0.52838EPSS
Exploits10References4
BDU FSTEC
BDU FSTEC
added 2021/06/01 12:0 a.m.3 views

The vulnerability of the ngx_resolver_copy() function in the nginx server allows a hacker to execute arbitrary code or cause a service failure.

The vulnerability of the ngxresolvercopy function in the nginx server is related to a single-byte offset error during the writing of the point symbol '.', 0x2E beyond the buffer limit. Exploiting this vulnerability allows an attacker to execute arbitrary code or cause a service failure by sending...

7.7CVSS8.1AI score0.52838EPSS
Exploits10References18Affected Software17
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