[USN-5340-1] CKEditor vulnerabilities

========================================================================== Ubuntu Security Notice USN-5340-1 March 22, 2022
ckeditor vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 21.10 – Ubuntu 20.04 LTS – Ubuntu 18.04 LTS
Summary:
Several security issues were fixed in CKEditor.
Software Description: – ckeditor: text editor which can be embedded into web pages
Details:
Kyaw Min Thein discovered that CKEditor incorrectly handled certain inputs. An attacker could possibly use this issue to execute arbitrary code. This issue only affects Ubuntu 18.04 LTS. (CVE-2018-9861)
Micha Bentkowski discovered that CKEditor incorrectly handled certain inputs. An attacker could possibly use this issue to execute arbitrary code. This issue only affects Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2020-9281)
Anton Subbotin discovered that CKEditor incorrectly handled certain inputs. An attacker could possibly use this issue to execute arbitrary code. This issue only affects Ubuntu 21.10. (CVE-2021-32808)
Anton Subbotin discovered that CKEditor incorrectly handled certain inputs. An attacker could possibly use this issue to inject arbitrary code. (CVE-2021-32809)
Or Sahar discovered that CKEditor incorrectly handled certain inputs. An attacker could possibly use this issue to execute arbitrary code. This issue only affects Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2021-33829)
Mika Kulmala discovered that CKEditor incorrectly handled certain inputs. An attacker could possibly use this issue to execute arbitrary code. (CVE-2021-37695)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 21.10: ckeditor 4.16.0+dfsg-2ubuntu0.1
Ubuntu 20.04 LTS: ckeditor 4.12.1+dfsg-1ubuntu0.1
Ubuntu 18.04 LTS: ckeditor 4.5.7+dfsg-2ubuntu0.18.04.1
In general, a standard system update will make all the necessary changes.
References: ubuntu.com/security/notices/USN-5340-1 CVE-2018-9861, CVE-2020-9281, CVE-2021-32808, CVE-2021-32809, CVE-2021-33829, CVE-2021-37695
Package Information: launchpad.net/ubuntu/+source/ckeditor/4.16.0+dfsg-2ubuntu0.1 launchpad.net/ubuntu/+source/ckeditor/4.12.1+dfsg-1ubuntu0.1 launchpad.net/ubuntu/+source/ckeditor/4.5.7+dfsg-2ubuntu0.18.04.1