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CVE-2016-2123

CVE-2016-2123

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

A flaw was found in samba versions 4.0.0 to 4.5.2. The Samba routine ndr_pull_dnsp_name contains an integer wrap problem, leading to an attacker-controlled memory overwrite. ndr_pull_dnsp_name parses data from the Samba Active Directory ldb database. Any user who can write to the dnsRecord attribute over LDAP can trigger this memory corruption. By default, all authenticated LDAP users can write to the dnsRecord attribute on new DNS objects. This makes the defect a remote privilege escalation.

CVSS 8.1 · High · EPSS 6.2% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • samba

    Versions
    • versions 4.0.0 to 4.5.2: Affected

    No fix published

  • samba Debian:12

    Affected ranges
    • ECOSYSTEM: < 2:4.5.2+dfsg-2

    Update to 2:4.5.2+dfsg-2

  • samba Debian:13

    Affected ranges
    • ECOSYSTEM: < 2:4.5.2+dfsg-2

    Update to 2:4.5.2+dfsg-2

  • samba Debian:14

    Affected ranges
    • ECOSYSTEM: < 2:4.5.2+dfsg-2

    Update to 2:4.5.2+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
    Affected ranges
    • ECOSYSTEM: < 2:4.3.11+dfsg-0ubuntu0.14.04.4

    Update to 2:4.3.11+dfsg-0ubuntu0.14.04.4

  • 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
    Affected ranges
    • ECOSYSTEM: < 2:4.3.11+dfsg-0ubuntu0.16.04.3

    Update to 2:4.3.11+dfsg-0ubuntu0.16.04.3

Original sources

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