Steven French discovered that Samba incorrectly handled ChangeNotify permissions. A remote attacker could possibly use this issue to obtain file name information. (CVE-2020-14318) Bas Alberts discovered that Samba incorrectly handled certain winbind requests. A remote attacker could possibly use this issue to cause winbind to crash, resulting in a denial of service. (CVE-2020-14323) Francis Brosnan Blázquez discovered that Samba incorrectly handled certain invalid DNS records. A remote attacker could possibly use this issue to cause the DNS server to crash, resulting in a denial of service. (CVE-2020-14383) Peter Eriksson discovered that Samba incorrectly handled certain negative idmap cache entries. This issue could result in certain users gaining unauthorized access to files, contrary to expected behaviour. (CVE-2021-20254)
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