UBUNTU-CVE-2021-36222

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Source
https://ubuntu.com/security/CVE-2021-36222
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-36222.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-36222
Upstream
Downstream
Related
Published
2021-07-22T18:15:00Z
Modified
2025-09-08T16:47:15Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

ecverify in kdc/kdcpreauth_ec.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.18.4 and 1.19.x before 1.19.2 allows remote attackers to cause a NULL pointer dereference and daemon crash. This occurs because a return value is not properly managed in a certain situation.

References

Affected packages

Ubuntu:18.04:LTS / krb5

Package

Name
krb5
Purl
pkg:deb/ubuntu/krb5@1.16-2ubuntu0.4?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.16-2ubuntu0.4

Affected versions

1.*

1.15.1-2
1.16-2
1.16-2build1
1.16-2ubuntu0.1
1.16-2ubuntu0.2
1.16-2ubuntu0.3

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "krb5-admin-server",
            "binary_version": "1.16-2ubuntu0.4"
        },
        {
            "binary_name": "krb5-gss-samples",
            "binary_version": "1.16-2ubuntu0.4"
        },
        {
            "binary_name": "krb5-k5tls",
            "binary_version": "1.16-2ubuntu0.4"
        },
        {
            "binary_name": "krb5-kdc",
            "binary_version": "1.16-2ubuntu0.4"
        },
        {
            "binary_name": "krb5-kdc-ldap",
            "binary_version": "1.16-2ubuntu0.4"
        },
        {
            "binary_name": "krb5-kpropd",
            "binary_version": "1.16-2ubuntu0.4"
        },
        {
            "binary_name": "krb5-locales",
            "binary_version": "1.16-2ubuntu0.4"
        },
        {
            "binary_name": "krb5-multidev",
            "binary_version": "1.16-2ubuntu0.4"
        },
        {
            "binary_name": "krb5-otp",
            "binary_version": "1.16-2ubuntu0.4"
        },
        {
            "binary_name": "krb5-pkinit",
            "binary_version": "1.16-2ubuntu0.4"
        },
        {
            "binary_name": "krb5-user",
            "binary_version": "1.16-2ubuntu0.4"
        },
        {
            "binary_name": "libgssapi-krb5-2",
            "binary_version": "1.16-2ubuntu0.4"
        },
        {
            "binary_name": "libgssrpc4",
            "binary_version": "1.16-2ubuntu0.4"
        },
        {
            "binary_name": "libk5crypto3",
            "binary_version": "1.16-2ubuntu0.4"
        },
        {
            "binary_name": "libkadm5clnt-mit11",
            "binary_version": "1.16-2ubuntu0.4"
        },
        {
            "binary_name": "libkadm5srv-mit11",
            "binary_version": "1.16-2ubuntu0.4"
        },
        {
            "binary_name": "libkdb5-9",
            "binary_version": "1.16-2ubuntu0.4"
        },
        {
            "binary_name": "libkrad-dev",
            "binary_version": "1.16-2ubuntu0.4"
        },
        {
            "binary_name": "libkrad0",
            "binary_version": "1.16-2ubuntu0.4"
        },
        {
            "binary_name": "libkrb5-3",
            "binary_version": "1.16-2ubuntu0.4"
        },
        {
            "binary_name": "libkrb5-dev",
            "binary_version": "1.16-2ubuntu0.4"
        },
        {
            "binary_name": "libkrb5support0",
            "binary_version": "1.16-2ubuntu0.4"
        }
    ]
}

Ubuntu:20.04:LTS / krb5

Package

Name
krb5
Purl
pkg:deb/ubuntu/krb5@1.17-6ubuntu4.3?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.17-6ubuntu4.3

Affected versions

1.*

1.17-6
1.17-6ubuntu3
1.17-6ubuntu4
1.17-6ubuntu4.1
1.17-6ubuntu4.2

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "krb5-admin-server",
            "binary_version": "1.17-6ubuntu4.3"
        },
        {
            "binary_name": "krb5-gss-samples",
            "binary_version": "1.17-6ubuntu4.3"
        },
        {
            "binary_name": "krb5-k5tls",
            "binary_version": "1.17-6ubuntu4.3"
        },
        {
            "binary_name": "krb5-kdc",
            "binary_version": "1.17-6ubuntu4.3"
        },
        {
            "binary_name": "krb5-kdc-ldap",
            "binary_version": "1.17-6ubuntu4.3"
        },
        {
            "binary_name": "krb5-kpropd",
            "binary_version": "1.17-6ubuntu4.3"
        },
        {
            "binary_name": "krb5-locales",
            "binary_version": "1.17-6ubuntu4.3"
        },
        {
            "binary_name": "krb5-multidev",
            "binary_version": "1.17-6ubuntu4.3"
        },
        {
            "binary_name": "krb5-otp",
            "binary_version": "1.17-6ubuntu4.3"
        },
        {
            "binary_name": "krb5-pkinit",
            "binary_version": "1.17-6ubuntu4.3"
        },
        {
            "binary_name": "krb5-user",
            "binary_version": "1.17-6ubuntu4.3"
        },
        {
            "binary_name": "libgssapi-krb5-2",
            "binary_version": "1.17-6ubuntu4.3"
        },
        {
            "binary_name": "libgssrpc4",
            "binary_version": "1.17-6ubuntu4.3"
        },
        {
            "binary_name": "libk5crypto3",
            "binary_version": "1.17-6ubuntu4.3"
        },
        {
            "binary_name": "libkadm5clnt-mit11",
            "binary_version": "1.17-6ubuntu4.3"
        },
        {
            "binary_name": "libkadm5srv-mit11",
            "binary_version": "1.17-6ubuntu4.3"
        },
        {
            "binary_name": "libkdb5-9",
            "binary_version": "1.17-6ubuntu4.3"
        },
        {
            "binary_name": "libkrad-dev",
            "binary_version": "1.17-6ubuntu4.3"
        },
        {
            "binary_name": "libkrad0",
            "binary_version": "1.17-6ubuntu4.3"
        },
        {
            "binary_name": "libkrb5-3",
            "binary_version": "1.17-6ubuntu4.3"
        },
        {
            "binary_name": "libkrb5-dev",
            "binary_version": "1.17-6ubuntu4.3"
        },
        {
            "binary_name": "libkrb5support0",
            "binary_version": "1.17-6ubuntu4.3"
        }
    ]
}