## USN-8951-1: c-ares vulnerabilities

- 種別: advisory
- 関連技術: ubuntu, linux
- CVE: CVE-2020-22217, CVE-2022-4904
- 公開日時: 2026-10-21T18:20:42.000Z
- 情報源: Ubuntu Security Notices (https://ubuntu.com/security/notices/USN-8951-1)
- パーマリンク: https://vulnpulse.app/items/ubuntu-usn-b484c8b72c54

It was discovered that c-ares incorrectly parsed certain SOA replies. A remote attacker could possibly use this issue to cause c-ares to crash, resulting in a denial of service. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2020-22217) It was discovered that c-ares incorrectly handled certain sortlist strings. A remote attacker could possibly use this issue to cause c-ares to crash, resulting in a denial of service, or execute arbitrary code. This issue only affected Ubuntu 16.04 LTS. (CVE-2022-4904) It was discovered that c-ares did not properly limit DNS compression p…