CVE-2023-32067

2023-05-2523:15:09

Google

osv.dev

c-ares

asynchronous resolver

denial of service

udp packet

vulnerability

patch

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

6.9 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

45.8%

JSON

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.

CPENameOperatorVersion
c-areseqcurl-7_16_4
c-areseqcares-1_9_0
c-areseqcares-1_5_1
c-areseqcurl-7_16_0
c-areseqcurl-7_13_1
c-areseqcurl-7_19_3
c-areseqcurl-7_18_1
c-areseqcares-1_7_2
c-areseqcares-1_5_0
c-areseqcares-1_2_1

Name	Operator	Version
c-ares	eq	curl-7_16_4
c-ares	eq	cares-1_9_0
c-ares	eq	cares-1_5_1
c-ares	eq	curl-7_16_0
c-ares	eq	curl-7_13_1
c-ares	eq	curl-7_19_3
c-ares	eq	curl-7_18_1
c-ares	eq	cares-1_7_2
c-ares	eq	cares-1_5_0
c-ares	eq	cares-1_2_1