c-ares 関連製品全体の CVE とセキュリティ脆弱性情報を集約し、CVSS、EPSS、公開日、脆弱性情報データを掲載しています。
一般的な弱点パターンには バッファオーバーフロー、vendor risk memory corruption, and パス処理の欠陥 があり、vendor surface software deployment and vendor surface production workloads の利用場面で アプリケーションクラッシュ、vendor impact memory corruption, and ファイル上書き などのリスクが生じる可能性があります。
掲載データは公開脆弱性情報とセキュリティ公告に基づき、過去の暴露面と修補優先度の評価に利用できます。
| CVE | 概要 | ソース | CVSS 最大値 | EPSS（%） | 公開 | 更新 |
|---|---|---|---|---|---|---|
| CVE-2025-62408 | c-ares is an asynchronous resolver library. Versions 1.32.3 through 1.34.5 terminate a query after maximum attempts when using read_answer() and process_answer(), which can cause a Denial of Service. This issue is fixed in version 1.34.6. | [email protected] | 5.9 | 0.39% | 2025-12-08 | 2026-02-02 |
| CVE-2024-25629 | c-ares is a C library for asynchronous DNS requests. `ares__read_line()` is used to parse local configuration files such as `/etc/resolv.conf`, `/etc/nsswitch.conf`, the `HOSTALIASES` file, and if using a c-ares version prior to 1.27.0, the `/etc/hosts` file. If any of these configuration files has an embedded `NULL` character as the first character in a new line, it can lead to attempting to read memory prior to the start of the given buffer which may result in a crash. This issue is fixed in c | [email protected] | 4.4 | 0.35% | 2024-02-23 | 2025-02-05 |
| CVE-2020-22217 | Buffer overflow vulnerability in c-ares before 1_16_1 thru 1_17_0 via function ares_parse_soa_reply in ares_parse_soa_reply.c. | [email protected] | 5.9 | 0.84% | 2023-08-22 | 2024-11-21 |
| CVE-2020-14354 | A possible use-after-free and double-free in c-ares lib version 1.16.0 if ares_destroy() is called prior to ares_getaddrinfo() completing. This flaw possibly allows an attacker to crash the service that uses c-ares lib. The highest threat from this vulnerability is to this service availability. | [email protected] | 3.3 | 0.53% | 2021-05-13 | 2024-11-21 |
| CVE-2017-1000381 | The c-ares function `ares_parse_naptr_reply()`, which is used for parsing NAPTR responses, could be triggered to read memory outside of the given input buffer if the passed in DNS response packet was crafted in a particular way. | [email protected] | 7.5 | 3.31% | 2017-07-07 | 2026-05-13 |
| CVE-2016-5180 | Heap-based buffer overflow in the ares_create_query function in c-ares 1.x before 1.12.0 allows remote attackers to cause a denial of service (out-of-bounds write) or possibly execute arbitrary code via a hostname with an escaped trailing dot. | [email protected] | 9.8 | 8.65% | 2016-10-03 | 2026-05-06 |