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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
619
nginx
off-by-one error
dns response processing
remote code execution
data confidentiality
data integrity
system availability
vulnerability

CVSS2

6.8

Attack Vector

NETWORK

Attack 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

CVSS3

7.7

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

EPSS

0.389

Percentile

97.3%

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

altlinux 1
fedora 2
openvas 18
nessus 42
ibm 7
osv 12
cloudlinux 2
ubuntucve 1
gentoo 1
zdt 2
rocky 3
packetstorm 2
redos 26
archlinux 2
oraclelinux 3
redhat 10
alpinelinux 1
debian 2
almalinux 3
ubuntu 2
suse 2
mageia 1
cbl_mariner 1
prion 1
f5 2
freebsd 1
hackerone 1
githubexploit 4
cve 1
cvelist 1
broadcom 2
nginx 1
veracode 1
amazon 1
nvd 1
debiancve 1
exploitdb 1
thn 1
photon 8
malwarebytes 1
oracle 4
altlinux
altlinux
Security fix for the ALT Linux 9 package nginx version 1.20.1-alt1
2021-06-23 00:00:00
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
openvas
openvas
Ubuntu: Security Advisory (USN-4967-1)
2021-05-27 00:00:00
openSUSE: Security Advisory for nginx (openSUSE-SU-2021:1815-1)
2021-07-13 00:00:00
openSUSE: Security Advisory for nginx (openSUSE-SU-2021:0835-1)
2021-06-04 00:00:00
nessus
nessus
openSUSE 15 Security Update : nginx (openSUSE-SU-2021:1815-1)
2021-07-16 00:00:00
nginx 0.6.x < 1.20.1 1-Byte Memory Overwrite RCE
2021-06-03 00:00:00
SUSE SLES15 Security Update : nginx (SUSE-SU-2021:1814-1)
2021-06-01 00:00:00
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 Discovery for IBM Cloud Pak for Data affected by vulnerability in Nginx
2021-10-01 06:18:54
Security Bulletin: nginx is vulnerable to CVE-2021-23017 used in IBM Maximo Application Suite - Edge Data Collector Component
2024-03-01 16:12:25
osv
osv
nginx - security update
2021-05-30 00:00:00
nginx vulnerability
2021-05-26 13:50:49
Important: nginx:1.16 security update
2021-06-08 09:47:28
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
ubuntucve
ubuntucve
CVE-2021-23017
2021-05-25 00:00:00
gentoo
gentoo
nginx: Remote code execution
2021-05-26 00:00:00
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
rocky
rocky
nginx:1.18 security update
2021-06-07 10:02:53
nginx:1.16 security update
2021-06-08 09:47:28
nginx:1.20 security update
2022-01-31 09:52:06
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
redos
redos
ROS-2-1005
2021-09-08 00:00:00
ROS-2-850
2021-12-24 00:00:00
ROS-2-566
2023-07-06 00:00:00
archlinux
archlinux
[ASA-202106-36] nginx: arbitrary code execution
2021-06-15 00:00:00
[ASA-202106-48] nginx-mainline: arbitrary code execution
2021-06-22 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
redhat
redhat
(RHSA-2021:2258) Important: rh-nginx118-nginx security update
2021-06-07 06:41:51
(RHSA-2021:2278) Important: rh-nginx116-nginx security update
2021-06-07 17:17:53
(RHSA-2021:2259) Important: nginx:1.18 security update
2021-06-07 10:02:53
alpinelinux
alpinelinux
CVE-2021-23017
2021-06-01 13:15:07
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:1.20 security update
2022-01-31 09:52:06
Important: nginx:1.18 security update
2021-06-07 10:02:53
ubuntu
ubuntu
nginx vulnerability
2021-05-27 00:00:00
nginx vulnerability
2021-05-26 00:00:00
suse
suse
Security update for nginx (important)
2021-06-04 00:00:00
Security update for nginx (important)
2021-07-11 00:00:00
mageia
mageia
Updated nginx package fixes a security vulnerability
2021-06-29 20:31:40
cbl_mariner
cbl_mariner
CVE-2021-23017 affecting package nginx 1.16.1-4
2021-06-14 15:32:58
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
freebsd
freebsd
NGINX -- 1-byte memory overwrite in resolver
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
githubexploit
githubexploit
Exploit for Off-by-one Error in F5 Nginx
2021-12-17 09:53:39
Exploit for Off-by-one Error in F5 Nginx
2023-10-21 04:24:02
Exploit for Off-by-one Error in F5 Nginx
2022-06-30 04:39:58
cve
cve
CVE-2021-23017
2021-06-01 13:15:07
cvelist
cvelist
CVE-2021-23017
2021-06-01 12:28:09
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
nginx
nginx
1-byte memory overwrite in resolver
2021-06-01 13:15:07
veracode
veracode
Remote Code Execution
2021-05-28 13:25:37
amazon
amazon
Important: nginx
2021-06-01 17:58:00
nvd
nvd
CVE-2021-23017
2021-06-01 13:15:07
debiancve
debiancve
CVE-2021-23017
2021-06-01 13:15:07
exploitdb
exploitdb
Nginx 1.20.0 - Denial of Service (DOS)
2022-07-11 00:00:00
thn
thn
Juniper Releases Patches for Critical Flaws in Junos OS and Contrail Networking
2022-07-18 05:02:00
photon
photon
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-2021-0394
2021-05-27 00:00:00
Important Photon OS Security Update - PHSA-2021-0032
2021-05-26 00:00:00
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 - April 2023
2023-04-18 00:00:00
Oracle Critical Patch Update Advisory - October 2021
2021-10-19 00:00:00

CVSS2

6.8

Attack Vector

NETWORK

Attack 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

CVSS3

7.7

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

EPSS

0.389

Percentile

97.3%

JSON
Related for RH:CVE-2021-23017
altlinux1fedora2openvas18nessus42ibm7osv12cloudlinux2ubuntucve1gentoo1zdt2rocky3packetstorm2redos26archlinux2oraclelinux3redhat10alpinelinux1debian2almalinux3ubuntu2suse2mageia1cbl_mariner1prion1f52freebsd1hackerone1githubexploit4cve1cvelist1broadcom2nginx1veracode1amazon1nvd1debiancve1exploitdb1thn1photon8malwarebytes1oracle4