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CVE-2021-23017

Published: Jun 1, 2021Updated: Nov 21, 2024 Sources: CVE List NVD BDUCWE-193
NVD MITRE
7.7CVSSHIGH
EPSS Score
52.8%
Top 1.2%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available

Description

A security issue in nginx resolver was identified, which might allow an attacker who is able to forge UDP packets from the DNS server to cause 1-byte memory overwrite, resulting in worker process crash or potential other impact.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:NS:UC:HI:HA:L
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:LAvailability
Low
Open in CVSS calculator →

Weaknesses

CWE-193

Affected Products

Nginx Web Server, Nginx Plusn/a
Debian GNU/LinuxСообщество свободного программного обеспечения
On-premOS
Operating Systems / linux-distro
UbuntuCanonical Ltd.
On-premOS
Operating Systems / linux-distro
Oracle Communications Operations MonitorOracle Corp.
On-prem
Databases / relational
Red Hat Enterprise LinuxRed Hat Inc.
On-premOS
Operating Systems / linux-distro
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
canonical ltd.commercialGBOperating Systemsaka canonical
oracle corp.commercialUSDatabasesaka oracle
red hat inc.commercialUSOperating Systemsaka red hat
and 29 more affected products View all →

Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

References

https://support.f5.com/csp/article/K12331123%2C
support.f5.com
http://mailman.nginx.org/pipermail/nginx-announce/2021/000300.html
mailman.nginx.org
https://lists.apache.org/thread.html/r6fc5c57b38e93e36213e9a18c8a4e5dbd5ced1c7e57f08a1735975ba%40%3Cnotifications.apisix.apache.org%3E
lists.apache.org
and 27 more references View all →

Timeline

Published
Jun 1, 2021
Last Updated
Nov 21, 2024

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