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    CVE-2018-16851

    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.

    Published:Nov 20, 2018
    Last Modified:Nov 21, 2024
    EPS:Nov 28, 2018
    EPSS Score:0.12108
    CVSS Score:6.5

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Samba
    Product
    Samba

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-476 NULL Pointer Dereference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    References

    http://www.securityfocus.com/bid/106027
    https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16851
    https://lists.debian.org/debian-lts-announce/2018/12/msg00005.html
    https://security.gentoo.org/glsa/202003-52
    https://security.netapp.com/advisory/ntap-20181127-0001/
    https://usn.ubuntu.com/3827-1/
    https://usn.ubuntu.com/3827-2/
    https://www.debian.org/security/2018/dsa-4345
    https://www.samba.org/samba/security/CVE-2018-16851.html
    http://www.securityfocus.com/bid/106027
    https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16851
    https://lists.debian.org/debian-lts-announce/2018/12/msg00005.html
    https://security.gentoo.org/glsa/202003-52
    https://security.netapp.com/advisory/ntap-20181127-0001/
    https://usn.ubuntu.com/3827-1/
    https://usn.ubuntu.com/3827-2/
    https://www.debian.org/security/2018/dsa-4345
    https://www.samba.org/samba/security/CVE-2018-16851.html

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High