ubuntu-usn

USN-4932-1: Django vulnerability It was discovered that Django incorrectly handled certain filenames. A remote attacker could possibly use this issue to create or overwrite files in unexpected directories. Source: USN-4932-1: Django vulnerability

USN-4933-1: OpenVPN vulnerabilities It was discovered that OpenVPN incorrectly handled certain data channel v2 packets. A remote attacker could possibly use this issue to inject packets using a victim’s peer-id. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2020-11810) It was discovered that OpenVPN incorrectly handled deferred authentication. When a server is configured to use deferred authentication, a remote attacker could possibly use this issue to bypass authentication and access control channel data. (CVE-2020-15078) Source: USN-4933-1: OpenVPN vulnerabilities

USN-4918-3: ClamAV regression USN-4918-1 fixed vulnerabilities in ClamAV. The updated package could fail to properly scan in some situations. This update fixes the problem. Original advisory details: It was discovered that ClamAV incorrectly handled parsing Excel documents. A remote attacker could possibly use this issue to cause ClamAV to hang, resulting in a denial of service. (CVE-2021-1252) It was discovered that ClamAV incorrectly handled parsing PDF documents. A remote attacker could possibly use this issue to cause ClamAV to crash, resulting in a denial of service. (CVE-2021-1404) It was discovered that ClamAV incorrectly handled parsing email. A remote attacker could possibly use this issue to cause ClamAV to crash, resulting in a denial of service. (CVE-2021-1405) Source: USN-4918-3: ClamAV regression

USN-4931-1: Samba vulnerabilities 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) Source: USN-4931-1: Samba vulnerabilities

USN-4930-1: Samba vulnerability 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. Source: USN-4930-1: Samba vulnerability