Resource exhaustion in C-ares
CVE-2023-32067
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 re…
Vulnerability class: DoS (Denial of Service)
EPSS: 0.016 (72.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- C-ares — versions < 1.19.1
- C-ares_project C-ares
- Debian Debian_linux — versions 10.0, 11.0
- Fedoraproject Fedora — versions 37, 38
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
- security-advisories@github.com (x_refsource_MISC, Release Notes)
- security-advisories@github.com (Mailing List, Third Party Advisory)
- security-advisories@github.com (Mailing List, Third Party Advisory)
- security-advisories@github.com (Third Party Advisory)
- security-advisories@github.com (Mailing List)
- security-advisories@github.com (Third Party Advisory)
- security-advisories@github.com
Frequently asked questions
- What is CVE-2023-32067?
- CVE-2023-32067 is a high-severity vulnerability in C-ares, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2023-05-25.
- How severe is CVE-2023-32067?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2023-32067 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.