UBUNTU-CVE-2018-5709

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Source
https://ubuntu.com/security/CVE-2018-5709
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-5709.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2018-5709
Withdrawn
2025-07-08T10:45:28Z
Published
2018-01-16T09:29:00Z
Modified
2025-07-08T14:32:18.464177Z
Upstream
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
  • - negligible
Summary
[none]
Details

An issue was discovered in MIT Kerberos 5 (aka krb5) through 1.16. There is a variable "dbentry->nkeydata" in kadmin/dbutil/dump.c that can store 16-bit data but unknowingly the developer has assigned a "u4" variable to it, which is for 32-bit data. An attacker can use this vulnerability to affect other artifacts of the database as we know that a Kerberos database dump file contains trusted data.

References

Affected packages

Ubuntu:Pro:14.04:LTS / krb5

Package

Name
krb5
Purl
pkg:deb/ubuntu/krb5@1.12+dfsg-2ubuntu5.4+esm7?arch=source&distro=esm-infra-legacy/trusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

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
1.12+dfsg-2ubuntu5.4+esm2
1.12+dfsg-2ubuntu5.4+esm3
1.12+dfsg-2ubuntu5.4+esm4
1.12+dfsg-2ubuntu5.4+esm5
1.12+dfsg-2ubuntu5.4+esm6
1.12+dfsg-2ubuntu5.4+esm7

Ubuntu:Pro:16.04:LTS / krb5

Package

Name
krb5
Purl
pkg:deb/ubuntu/krb5@1.13.2+dfsg-5ubuntu2.2+esm7?arch=source&distro=esm-infra/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

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
1.13.2+dfsg-5ubuntu2.1+esm1
1.13.2+dfsg-5ubuntu2.2
1.13.2+dfsg-5ubuntu2.2+esm3
1.13.2+dfsg-5ubuntu2.2+esm4
1.13.2+dfsg-5ubuntu2.2+esm5
1.13.2+dfsg-5ubuntu2.2+esm6
1.13.2+dfsg-5ubuntu2.2+esm7

Ubuntu:Pro:18.04:LTS / krb5

Package

Name
krb5
Purl
pkg:deb/ubuntu/krb5@1.16-2ubuntu0.4+esm5?arch=source&distro=esm-infra/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.15.1-2
1.16-2
1.16-2build1
1.16-2ubuntu0.1
1.16-2ubuntu0.1+esm1
1.16-2ubuntu0.2
1.16-2ubuntu0.3
1.16-2ubuntu0.4
1.16-2ubuntu0.4+esm1
1.16-2ubuntu0.4+esm2
1.16-2ubuntu0.4+esm3
1.16-2ubuntu0.4+esm5

Ubuntu:Pro:20.04:LTS / krb5

Package

Name
krb5
Purl
pkg:deb/ubuntu/krb5@1.17-6ubuntu4.11?arch=source&distro=esm-infra/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.17-6
1.17-6ubuntu3
1.17-6ubuntu4
1.17-6ubuntu4.1
1.17-6ubuntu4.2
1.17-6ubuntu4.3
1.17-6ubuntu4.4
1.17-6ubuntu4.6
1.17-6ubuntu4.7
1.17-6ubuntu4.8
1.17-6ubuntu4.9
1.17-6ubuntu4.11

Ubuntu:22.04:LTS / krb5

Package

Name
krb5
Purl
pkg:deb/ubuntu/krb5@1.19.2-2ubuntu0.7?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.18.3-6
1.18.3-7
1.19.2-0ubuntu1
1.19.2-1
1.19.2-2
1.19.2-2ubuntu0.1
1.19.2-2ubuntu0.2
1.19.2-2ubuntu0.3
1.19.2-2ubuntu0.4
1.19.2-2ubuntu0.5
1.19.2-2ubuntu0.6
1.19.2-2ubuntu0.7