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CVE-2018-16851

CVE-2018-16851

This page contains facts from public vulnerability sources. Check the original advisory before updating.

Samba from version 4.0.0 and before versions 4.7.12, 4.8.7, 4.9.3 is vulnerable to a denial of service. During the processing of an LDAP search before Samba's AD DC returns the LDAP entries to the client, the entries are cached in a single memory object with a maximum size of 256MB. When this size is reached, the Samba process providing the LDAP service will follow the NULL pointer, terminating the process. There is no further vulnerability associated with this issue, merely a denial of service.

CVSS 6.5 · Medium · EPSS 3.3% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • samba

    Versions
    • 4.7.12: Affected
    • 4.8.7: Affected
    • 4.9.3: Affected

    No fix published

  • samba Debian:12

    Affected ranges
    • ECOSYSTEM: < 2:4.9.2+dfsg-2

    Update to 2:4.9.2+dfsg-2

  • samba Debian:13

    Affected ranges
    • ECOSYSTEM: < 2:4.9.2+dfsg-2

    Update to 2:4.9.2+dfsg-2

  • samba Debian:14

    Affected ranges
    • ECOSYSTEM: < 2:4.9.2+dfsg-2

    Update to 2:4.9.2+dfsg-2

  • samba Ubuntu:14.04:LTS

    Versions
    • 2:3.6.18-1ubuntu3
    • 2:4.0.10+dfsg-4ubuntu2
    • 2:4.0.13+dfsg-1ubuntu1
    • 2:4.1.3+dfsg-2ubuntu2
    • 2:4.1.3+dfsg-2ubuntu3
    • 2:4.1.3+dfsg-2ubuntu4
    • 2:4.1.3+dfsg-2ubuntu5
    • 2:4.1.6+dfsg-1ubuntu1
    • 2:4.1.6+dfsg-1ubuntu2
    • 2:4.1.6+dfsg-1ubuntu2.14.04.1
    • 2:4.1.6+dfsg-1ubuntu2.14.04.2
    • 2:4.1.6+dfsg-1ubuntu2.14.04.3
    • 2:4.1.6+dfsg-1ubuntu2.14.04.4
    • 2:4.1.6+dfsg-1ubuntu2.14.04.5
    • 2:4.1.6+dfsg-1ubuntu2.14.04.7
    • 2:4.1.6+dfsg-1ubuntu2.14.04.8
    • 2:4.1.6+dfsg-1ubuntu2.14.04.9
    • 2:4.1.6+dfsg-1ubuntu2.14.04.11
    • 2:4.1.6+dfsg-1ubuntu2.14.04.12
    • 2:4.1.6+dfsg-1ubuntu2.14.04.13
    • 2:4.3.8+dfsg-0ubuntu0.14.04.2
    • 2:4.3.9+dfsg-0ubuntu0.14.04.1
    • 2:4.3.9+dfsg-0ubuntu0.14.04.3
    • 2:4.3.11+dfsg-0ubuntu0.14.04.1
    • 2:4.3.11+dfsg-0ubuntu0.14.04.2
    • 2:4.3.11+dfsg-0ubuntu0.14.04.3
    • 2:4.3.11+dfsg-0ubuntu0.14.04.4
    • 2:4.3.11+dfsg-0ubuntu0.14.04.6
    • 2:4.3.11+dfsg-0ubuntu0.14.04.7
    • 2:4.3.11+dfsg-0ubuntu0.14.04.8
    • 2:4.3.11+dfsg-0ubuntu0.14.04.9
    • 2:4.3.11+dfsg-0ubuntu0.14.04.10
    • 2:4.3.11+dfsg-0ubuntu0.14.04.11
    • 2:4.3.11+dfsg-0ubuntu0.14.04.12
    • 2:4.3.11+dfsg-0ubuntu0.14.04.13
    • 2:4.3.11+dfsg-0ubuntu0.14.04.14
    • 2:4.3.11+dfsg-0ubuntu0.14.04.16
    • 2:4.3.11+dfsg-0ubuntu0.14.04.17
    Affected ranges
    • ECOSYSTEM: < 2:4.3.11+dfsg-0ubuntu0.14.04.19

    Update to 2:4.3.11+dfsg-0ubuntu0.14.04.19

  • samba Ubuntu:16.04:LTS

    Versions
    • 2:4.1.17+dfsg-4ubuntu2
    • 2:4.1.20+dfsg-1ubuntu1
    • 2:4.1.20+dfsg-1ubuntu2
    • 2:4.1.20+dfsg-1ubuntu3
    • 2:4.1.20+dfsg-1ubuntu5
    • 2:4.3.3+dfsg-1ubuntu1
    • 2:4.3.3+dfsg-1ubuntu2
    • 2:4.3.3+dfsg-1ubuntu3
    • 2:4.3.6+dfsg-1ubuntu1
    • 2:4.3.8+dfsg-0ubuntu1
    • 2:4.3.9+dfsg-0ubuntu0.16.04.1
    • 2:4.3.9+dfsg-0ubuntu0.16.04.2
    • 2:4.3.9+dfsg-0ubuntu0.16.04.3
    • 2:4.3.11+dfsg-0ubuntu0.16.04.1
    • 2:4.3.11+dfsg-0ubuntu0.16.04.3
    • 2:4.3.11+dfsg-0ubuntu0.16.04.5
    • 2:4.3.11+dfsg-0ubuntu0.16.04.6
    • 2:4.3.11+dfsg-0ubuntu0.16.04.7
    • 2:4.3.11+dfsg-0ubuntu0.16.04.8
    • 2:4.3.11+dfsg-0ubuntu0.16.04.9
    • 2:4.3.11+dfsg-0ubuntu0.16.04.10
    • 2:4.3.11+dfsg-0ubuntu0.16.04.11
    • 2:4.3.11+dfsg-0ubuntu0.16.04.12
    • 2:4.3.11+dfsg-0ubuntu0.16.04.13
    • 2:4.3.11+dfsg-0ubuntu0.16.04.15
    • 2:4.3.11+dfsg-0ubuntu0.16.04.16
    • 2:4.3.11+dfsg-0ubuntu0.16.04.17
    Affected ranges
    • ECOSYSTEM: < 2:4.3.11+dfsg-0ubuntu0.16.04.18

    Update to 2:4.3.11+dfsg-0ubuntu0.16.04.18

  • samba Ubuntu:18.04:LTS

    Versions
    • 2:4.6.7+dfsg-1ubuntu3
    • 2:4.7.1+dfsg-1ubuntu1
    • 2:4.7.3+dfsg-1ubuntu1
    • 2:4.7.4+dfsg-1ubuntu1
    • 2:4.7.6+dfsg~ubuntu-0ubuntu1
    • 2:4.7.6+dfsg~ubuntu-0ubuntu2
    • 2:4.7.6+dfsg~ubuntu-0ubuntu2.2
    • 2:4.7.6+dfsg~ubuntu-0ubuntu2.4
    Affected ranges
    • ECOSYSTEM: < 2:4.7.6+dfsg~ubuntu-0ubuntu2.5

    Update to 2:4.7.6+dfsg~ubuntu-0ubuntu2.5

Original sources

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