CVE-2023-32067 — Uncontrolled Resource Consumption in C-ares

CWE-400 — Uncontrolled Resource Consumption10 documents7 sources
Severity
7.5HIGHNVD
OSV6.4
EPSS
0.4%
top 38.65%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
C-aresC-ares Project C-aresDebian Linux+1 more
Timeline
PublishedMay 25
Latest updateSep 11

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

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages4 packages

▶CVEListV5c-ares/c-ares< 1.19.1
▶NVDc-ares_project/c-ares< 1.19.1
▶Debianc-ares/c-ares< 1.17.1-1+deb11u3+3
▶Ubuntuc-ares/c-ares< 1.15.0-1ubuntu0.3+1

Also affects: Debian Linux 10.0, 11.0, Fedora 37, 38

🔴Vulnerability Details

4
OSV
c-ares vulnerabilities↗2023-09-11
▶
OSV
c-ares vulnerabilities↗2023-06-14
▶
CVEList
0-byte UDP payload DoS in c-ares↗2023-05-25
▶
OSV
CVE-2023-32067: c-ares is an asynchronous resolver library↗2023-05-25
▶

📋Vendor Advisories

5
Ubuntu
c-ares vulnerabilities↗2023-09-11
▶
Ubuntu
c-ares vulnerabilities↗2023-06-14
▶
Red Hat
c-ares: 0-byte UDP payload Denial of Service↗2023-05-22
▶
Microsoft
0-byte UDP payload DoS in c-ares↗2023-05-09
▶
Debian
CVE-2023-32067: c-ares - c-ares is an asynchronous resolver library. c-ares is vulnerable to denial of se...↗2023
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CVE-2023-32067 — Uncontrolled Resource Consumption | cvebase