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CVE-2023-32067

0-byte UDP payload DoS in c-ares

Published: May 25, 2023Updated: Nov 21, 2024 Sources: CVE List NVD BDU csafCWE-400
NVD MITRE
7.5CVSSHIGH
EPSS Score
1.6%
Top 28.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

c-ares is an asynchronous resolver library. c-ares is vulnerable to denial of service. If a target resolver sends a query, the attacker forges a malformed UDP packet with a length of 0 and returns them to the target resolver. The target resolver erroneously interprets the 0 length as a graceful shutdown of the connection. This issue has been patched in version 1.19.1.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-400NVD-CWE-noinfo

Affected Products

c-aresc-ares
Library
OSS Libraries / generic-library
c-aresc-ares project
Library
OSS Libraries / generic-library
fedorafedoraproject
On-premOS
Operating Systems / linux-distro
debian linuxdebian
On-premOS
Operating Systems / linux-distro
Debian GNU/LinuxСообщество свободного программного обеспечения
On-premOS
Operating Systems / linux-distro
c-aresoss-projectOSS Libraries
c-ares projectoss-projectUSOSS Librariesaka c-ares
fedoraprojectoss-projectUSOperating Systemsaka fedora project
debianoss-projectGBOperating Systemsaka debian gnu/linux
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
and 6 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://github.com/c-ares/c-ares/security/advisories/GHSA-9g78-jv2r-p7vc
github.com
https://github.com/c-ares/c-ares/releases/tag/cares-1_19_1
github.com
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/B5Z5XFNXTNPTCBBVXFDNZQVLLIE6VRBY/
lists.fedoraproject.org
and 28 more references View all →

Timeline

Published
May 25, 2023
Last Updated
Nov 21, 2024

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