UBUNTU-CVE-2020-28196

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Source
https://ubuntu.com/security/CVE-2020-28196
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-28196.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2020-28196
Upstream
Downstream
Related
Published
2020-11-06T08:15:00Z
Modified
2025-12-08T07:33:54.719747Z
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
  • 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

MIT Kerberos 5 (aka krb5) before 1.17.2 and 1.18.x before 1.18.3 allows unbounded recursion via an ASN.1-encoded Kerberos message because the lib/krb5/asn.1/asn1_encode.c support for BER indefinite lengths lacks a recursion limit.

References

Affected packages

Ubuntu:Pro:14.04:LTS / krb5

Package

Name
krb5
Purl
pkg:deb/ubuntu/krb5@1.12+dfsg-2ubuntu5.4+esm2?arch=source&distro=trusty/esm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.12+dfsg-2ubuntu5.4+esm2

Affected versions

1.*

1.10.1+dfsg-6.1ubuntu1
1.11.3+dfsg-3ubuntu2
1.12+dfsg-2ubuntu1
1.12+dfsg-2ubuntu2
1.12+dfsg-2ubuntu3
1.12+dfsg-2ubuntu4
1.12+dfsg-2ubuntu4.2
1.12+dfsg-2ubuntu5
1.12+dfsg-2ubuntu5.1
1.12+dfsg-2ubuntu5.2
1.12+dfsg-2ubuntu5.3
1.12+dfsg-2ubuntu5.4
1.12+dfsg-2ubuntu5.4+esm1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm2",
            "binary_name": "krb5-admin-server"
        },
        {
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm2",
            "binary_name": "krb5-gss-samples"
        },
        {
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm2",
            "binary_name": "krb5-kdc"
        },
        {
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm2",
            "binary_name": "krb5-kdc-ldap"
        },
        {
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm2",
            "binary_name": "krb5-locales"
        },
        {
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm2",
            "binary_name": "krb5-multidev"
        },
        {
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm2",
            "binary_name": "krb5-otp"
        },
        {
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm2",
            "binary_name": "krb5-pkinit"
        },
        {
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm2",
            "binary_name": "krb5-user"
        },
        {
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm2",
            "binary_name": "libgssapi-krb5-2"
        },
        {
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm2",
            "binary_name": "libgssrpc4"
        },
        {
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm2",
            "binary_name": "libk5crypto3"
        },
        {
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm2",
            "binary_name": "libkadm5clnt-mit9"
        },
        {
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm2",
            "binary_name": "libkadm5srv-mit8"
        },
        {
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm2",
            "binary_name": "libkadm5srv-mit9"
        },
        {
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm2",
            "binary_name": "libkdb5-7"
        },
        {
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm2",
            "binary_name": "libkrad-dev"
        },
        {
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm2",
            "binary_name": "libkrad0"
        },
        {
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm2",
            "binary_name": "libkrb5-3"
        },
        {
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm2",
            "binary_name": "libkrb5-dev"
        },
        {
            "binary_version": "1.12+dfsg-2ubuntu5.4+esm2",
            "binary_name": "libkrb5support0"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-28196.json"

Ubuntu:16.04:LTS / krb5

Package

Name
krb5
Purl
pkg:deb/ubuntu/krb5@1.13.2+dfsg-5ubuntu2.2?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.13.2+dfsg-5ubuntu2.2

Affected versions

1.*

1.13.2+dfsg-2
1.13.2+dfsg-3
1.13.2+dfsg-4
1.13.2+dfsg-5
1.13.2+dfsg-5ubuntu1
1.13.2+dfsg-5ubuntu2
1.13.2+dfsg-5ubuntu2.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "1.13.2+dfsg-5ubuntu2.2",
            "binary_name": "krb5-admin-server"
        },
        {
            "binary_version": "1.13.2+dfsg-5ubuntu2.2",
            "binary_name": "krb5-gss-samples"
        },
        {
            "binary_version": "1.13.2+dfsg-5ubuntu2.2",
            "binary_name": "krb5-k5tls"
        },
        {
            "binary_version": "1.13.2+dfsg-5ubuntu2.2",
            "binary_name": "krb5-kdc"
        },
        {
            "binary_version": "1.13.2+dfsg-5ubuntu2.2",
            "binary_name": "krb5-kdc-ldap"
        },
        {
            "binary_version": "1.13.2+dfsg-5ubuntu2.2",
            "binary_name": "krb5-locales"
        },
        {
            "binary_version": "1.13.2+dfsg-5ubuntu2.2",
            "binary_name": "krb5-multidev"
        },
        {
            "binary_version": "1.13.2+dfsg-5ubuntu2.2",
            "binary_name": "krb5-otp"
        },
        {
            "binary_version": "1.13.2+dfsg-5ubuntu2.2",
            "binary_name": "krb5-pkinit"
        },
        {
            "binary_version": "1.13.2+dfsg-5ubuntu2.2",
            "binary_name": "krb5-user"
        },
        {
            "binary_version": "1.13.2+dfsg-5ubuntu2.2",
            "binary_name": "libgssapi-krb5-2"
        },
        {
            "binary_version": "1.13.2+dfsg-5ubuntu2.2",
            "binary_name": "libgssrpc4"
        },
        {
            "binary_version": "1.13.2+dfsg-5ubuntu2.2",
            "binary_name": "libk5crypto3"
        },
        {
            "binary_version": "1.13.2+dfsg-5ubuntu2.2",
            "binary_name": "libkadm5clnt-mit9"
        },
        {
            "binary_version": "1.13.2+dfsg-5ubuntu2.2",
            "binary_name": "libkadm5srv-mit9"
        },
        {
            "binary_version": "1.13.2+dfsg-5ubuntu2.2",
            "binary_name": "libkdb5-8"
        },
        {
            "binary_version": "1.13.2+dfsg-5ubuntu2.2",
            "binary_name": "libkrad-dev"
        },
        {
            "binary_version": "1.13.2+dfsg-5ubuntu2.2",
            "binary_name": "libkrad0"
        },
        {
            "binary_version": "1.13.2+dfsg-5ubuntu2.2",
            "binary_name": "libkrb5-3"
        },
        {
            "binary_version": "1.13.2+dfsg-5ubuntu2.2",
            "binary_name": "libkrb5-dev"
        },
        {
            "binary_version": "1.13.2+dfsg-5ubuntu2.2",
            "binary_name": "libkrb5support0"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-28196.json"

Ubuntu:18.04:LTS / krb5

Package

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

Affected ranges

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

Affected versions

1.*

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

Ecosystem specific 

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

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-28196.json"

Ubuntu:20.04:LTS / krb5

Package

Name
krb5
Purl
pkg:deb/ubuntu/krb5@1.17-6ubuntu4.1?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.17-6ubuntu4.1

Affected versions

1.*

1.17-6
1.17-6ubuntu3
1.17-6ubuntu4

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "1.17-6ubuntu4.1",
            "binary_name": "krb5-admin-server"
        },
        {
            "binary_version": "1.17-6ubuntu4.1",
            "binary_name": "krb5-gss-samples"
        },
        {
            "binary_version": "1.17-6ubuntu4.1",
            "binary_name": "krb5-k5tls"
        },
        {
            "binary_version": "1.17-6ubuntu4.1",
            "binary_name": "krb5-kdc"
        },
        {
            "binary_version": "1.17-6ubuntu4.1",
            "binary_name": "krb5-kdc-ldap"
        },
        {
            "binary_version": "1.17-6ubuntu4.1",
            "binary_name": "krb5-kpropd"
        },
        {
            "binary_version": "1.17-6ubuntu4.1",
            "binary_name": "krb5-locales"
        },
        {
            "binary_version": "1.17-6ubuntu4.1",
            "binary_name": "krb5-multidev"
        },
        {
            "binary_version": "1.17-6ubuntu4.1",
            "binary_name": "krb5-otp"
        },
        {
            "binary_version": "1.17-6ubuntu4.1",
            "binary_name": "krb5-pkinit"
        },
        {
            "binary_version": "1.17-6ubuntu4.1",
            "binary_name": "krb5-user"
        },
        {
            "binary_version": "1.17-6ubuntu4.1",
            "binary_name": "libgssapi-krb5-2"
        },
        {
            "binary_version": "1.17-6ubuntu4.1",
            "binary_name": "libgssrpc4"
        },
        {
            "binary_version": "1.17-6ubuntu4.1",
            "binary_name": "libk5crypto3"
        },
        {
            "binary_version": "1.17-6ubuntu4.1",
            "binary_name": "libkadm5clnt-mit11"
        },
        {
            "binary_version": "1.17-6ubuntu4.1",
            "binary_name": "libkadm5srv-mit11"
        },
        {
            "binary_version": "1.17-6ubuntu4.1",
            "binary_name": "libkdb5-9"
        },
        {
            "binary_version": "1.17-6ubuntu4.1",
            "binary_name": "libkrad-dev"
        },
        {
            "binary_version": "1.17-6ubuntu4.1",
            "binary_name": "libkrad0"
        },
        {
            "binary_version": "1.17-6ubuntu4.1",
            "binary_name": "libkrb5-3"
        },
        {
            "binary_version": "1.17-6ubuntu4.1",
            "binary_name": "libkrb5-dev"
        },
        {
            "binary_version": "1.17-6ubuntu4.1",
            "binary_name": "libkrb5support0"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-28196.json"