CVE-2023-32067
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
C-ares
PublishedMay 25, 2023
First seenMay 25, 2023
Weakness typeCWE-400Uncontrolled resource consumption
How to fix
Update
- c-ares_project c-ares1.19.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| c-ares_project c-ares | v < 1.19.1 | 1.19.1 |
| fedoraproject fedora | 37, 38 | — |
| debian debian_linux | 10.0, 11.0 | — |
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