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
AI Score
Confidence
High
EPSS
Percentile
48.7%
SSVC
Exploitation
none
Automatable
yes
Technical Impact
partial
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.
[
{
"cpes": [
"cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*"
],
"vendor": "fedoraproject",
"product": "fedora",
"versions": [
{
"status": "affected",
"version": "37"
}
],
"defaultStatus": "unknown"
},
{
"cpes": [
"cpe:2.3:a:c-ares:c-ares:*:*:*:*:*:*:*:*"
],
"vendor": "c-ares",
"product": "c-ares",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "1.19.1",
"versionType": "custom"
}
],
"defaultStatus": "unknown"
},
{
"cpes": [
"cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*"
],
"vendor": "fedoraproject",
"product": "fedora",
"versions": [
{
"status": "affected",
"version": "38"
}
],
"defaultStatus": "unknown"
},
{
"cpes": [
"cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
"cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*"
],
"vendor": "debian",
"product": "debian_linux",
"versions": [
{
"status": "affected",
"version": "10.0"
},
{
"status": "affected",
"version": "11.0"
}
],
"defaultStatus": "unknown"
}
]
github.com/c-ares/c-ares/releases/tag/cares-1_19_1
github.com/c-ares/c-ares/security/advisories/GHSA-9g78-jv2r-p7vc
lists.debian.org/debian-lts-announce/2023/06/msg00034.html
lists.fedoraproject.org/archives/list/[email protected]/message/B5Z5XFNXTNPTCBBVXFDNZQVLLIE6VRBY/
lists.fedoraproject.org/archives/list/[email protected]/message/UBFWILTA33LOSV23P44FGTQQIDRJHIY7/
security.gentoo.org/glsa/202310-09
security.netapp.com/advisory/ntap-20240605-0004/
www.debian.org/security/2023/dsa-5419
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
AI Score
Confidence
High
EPSS
Percentile
48.7%
SSVC
Exploitation
none
Automatable
yes
Technical Impact
partial