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redhatcveRedhat.comRH:CVE-2021-23017
HistoryMay 26, 2021 - 8:17 a.m.

CVE-2021-23017

2021-05-2608:17:46
redhat.com
access.redhat.com
587

7.7 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

LOW

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L

6.8 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:P/I:P/A:P

0.582 Medium

EPSS

Percentile

97.7%

JSON

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 certain circumstances. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Related

fedora 2
ibm 7
altlinux 1
osv 12
packetstorm 2
nessus 40
gentoo 1
ubuntucve 1
cloudlinux 2
rocky 3
zdt 2
oraclelinux 3
ubuntu 2
alpinelinux 1
redhat 10
archlinux 2
debian 2
almalinux 3
amazon 1
debiancve 1
redos 12
broadcom 2
githubexploit 3
nginx 1
veracode 1
suse 2
prion 1
f5 2
hackerone 1
mageia 1
freebsd 1
cve 1
cbl_mariner 1
exploitdb 1
photon 8
thn 1
malwarebytes 1
oracle 4
fedora
fedora
[SECURITY] Fedora 34 Update: nginx-1.20.1-2.fc34
2021-06-11 01:15:42
[SECURITY] Fedora 33 Update: nginx-1.20.1-2.fc33
2021-06-11 01:19:56
ibm
ibm
Security Bulletin: IBM API Connect V5 is impacted by a vulnerability in nginx. (CVE-2021-23017)
2021-08-25 13:37:28
Security Bulletin: IBM Watson Machine Learning Accelerator is affected by a vulnerability in Nginx
2021-08-31 01:55:01
Security Bulletin: IBM Watson Discovery for IBM Cloud Pak for Data affected by vulnerability in Nginx
2021-10-01 06:18:54
altlinux
altlinux
Security fix for the ALT Linux 9 package nginx version 1.20.1-alt1
2021-06-23 00:00:00
osv
osv
nginx - security update
2021-05-30 00:00:00
nginx vulnerability
2021-05-26 13:50:49
BIT-nginx-2021-23017
2024-03-06 10:59:30
packetstorm
packetstorm
nginx 1.20.0 DNS Resolver Off-By-One Heap Write
2021-05-26 00:00:00
Nginx 1.20.0 Denial Of Service
2022-07-11 00:00:00
nessus
nessus
nginx 0.6.x < 1.20.1 1-Byte Memory Overwrite RCE
2021-06-03 00:00:00
openSUSE 15 Security Update : nginx (openSUSE-SU-2021:1815-1)
2021-07-16 00:00:00
Puppet Enterprise < 2019.8.7 / 2021.x < 2021.2 Nginx Vulnerability
2023-11-01 00:00:00
gentoo
gentoo
nginx: Remote code execution
2021-05-26 00:00:00
ubuntucve
ubuntucve
CVE-2021-23017
2021-05-25 00:00:00
cloudlinux
cloudlinux
Fix of CVE: CVE-2021-23017
2021-09-21 22:02:21
Fix of CVE: CVE-2021-23017
2021-09-21 22:02:42
rocky
rocky
nginx:1.18 security update
2021-06-07 10:02:53
nginx:1.20 security update
2022-01-31 09:52:06
nginx:1.16 security update
2021-06-08 09:47:28
zdt
zdt
nginx 1.20.0 DNS Resolver Off-By-One Heap Write Exploit
2021-05-27 00:00:00
Nginx 1.20.0 - Denial of Service Exploit
2022-07-11 00:00:00
oraclelinux
oraclelinux
nginx:1.20 security update
2022-02-01 00:00:00
nginx:1.18 security update
2021-06-08 00:00:00
nginx:1.16 security update
2021-06-10 00:00:00
ubuntu
ubuntu
nginx vulnerability
2021-05-27 00:00:00
nginx vulnerability
2021-05-26 00:00:00
alpinelinux
alpinelinux
CVE-2021-23017
2021-06-01 13:15:00
redhat
redhat
(RHSA-2021:2258) Important: rh-nginx118-nginx security update
2021-06-07 06:41:51
(RHSA-2021:2290) Important: nginx:1.16 security update
2021-06-08 09:47:28
(RHSA-2021:2278) Important: rh-nginx116-nginx security update
2021-06-07 17:17:53
archlinux
archlinux
[ASA-202106-48] nginx-mainline: arbitrary code execution
2021-06-22 00:00:00
[ASA-202106-36] nginx: arbitrary code execution
2021-06-15 00:00:00
debian
debian
[SECURITY] [DSA 4921-1] nginx security update
2021-05-28 12:05:07
[SECURITY] [DLA 2670-1] nginx security update
2021-05-30 12:56:20
almalinux
almalinux
Important: nginx:1.16 security update
2021-06-08 09:47:28
Important: nginx:1.18 security update
2021-06-07 10:02:53
Important: nginx:1.20 security update
2022-01-31 09:52:06
amazon
amazon
Important: nginx
2021-06-01 17:58:00
debiancve
debiancve
CVE-2021-23017
2021-06-01 13:15:00
redos
redos
ROS-2-600
2021-09-08 00:00:00
ROS-2-681
2021-09-08 00:00:00
ROS-2-528
2021-09-08 00:00:00
broadcom
broadcom
CVE-2021-23017: NGINX Resolver Vulnerability
2022-11-08 00:00:00
CVE-2021-23017: NGINX Resolver Vulnerability
2022-11-08 00:00:00
githubexploit
githubexploit
Exploit for Off-by-one Error in F5 Nginx
2022-06-30 04:39:58
Exploit for Off-by-one Error in F5 Nginx
2023-07-20 05:39:01
Exploit for Off-by-one Error in F5 Nginx
2023-10-21 04:24:02
nginx
nginx
1-byte memory overwrite in resolver
2021-06-01 13:15:00
veracode
veracode
Remote Code Execution
2021-05-28 13:25:37
suse
suse
Security update for nginx (important)
2021-06-04 00:00:00
Security update for nginx (important)
2021-07-11 00:00:00
prion
prion
Memory corruption
2021-06-01 13:15:00
f5
f5
K12331123 : NGINX Plus and Open Source vulnerability CVE-2021-23017
2021-05-25 00:00:00
K52559937 : Overview of NGINX vulnerabilities (May 2021)
2021-05-25 00:00:00
hackerone
hackerone
Internet Bug Bounty: 1-byte heap buffer overflow in DNS resolver
2021-05-27 10:32:41
mageia
mageia
Updated nginx package fixes a security vulnerability
2021-06-29 20:31:40
freebsd
freebsd
NGINX -- 1-byte memory overwrite in resolver
2021-05-25 00:00:00
cve
cve
CVE-2021-23017
2021-06-01 13:15:00
cbl_mariner
cbl_mariner
CVE-2021-23017 affecting package nginx 1.16.1-4
2021-06-14 15:32:58
exploitdb
exploitdb
Nginx 1.20.0 - Denial of Service (DOS)
2022-07-11 00:00:00
photon
photon
Important Photon OS Security Update - PHSA-2021-0394
2021-05-27 00:00:00
Home Download Photon OS User Documentation FAQ Security Advisories Related Information Lightwave - PHSA-2021-1.0-0394
2021-05-27 00:00:00
Important Photon OS Security Update - PHSA-2021-0032
2021-05-26 00:00:00
thn
thn
Juniper Releases Patches for Critical Flaws in Junos OS and Contrail Networking
2022-07-18 05:02:00
malwarebytes
malwarebytes
Oracle releases massive Critical Patch Update containing 520 security patches
2022-04-20 14:53:54
oracle
oracle
Oracle Critical Patch Update Advisory - January 2022
2022-01-18 00:00:00
Oracle Critical Patch Update Advisory - October 2021
2021-10-19 00:00:00
Oracle Critical Patch Update Advisory - April 2023
2023-04-18 00:00:00

7.7 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

LOW

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L

6.8 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:P/I:P/A:P

0.582 Medium

EPSS

Percentile

97.7%

JSON
Related for RH:CVE-2021-23017
fedora2ibm7altlinux1osv12packetstorm2nessus40gentoo1ubuntucve1cloudlinux2rocky3zdt2oraclelinux3ubuntu2alpinelinux1redhat10archlinux2debian2almalinux3amazon1debiancve1redos12broadcom2githubexploit3nginx1veracode1suse2prion1f52hackerone1mageia1freebsd1cve1cbl_mariner1exploitdb1photon8thn1malwarebytes1oracle4