Vulnerability Monitor

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CVE-2019-14861

All Samba versions 4.x.x before 4.9.17, 4.10.x before 4.10.11 and 4.11.x before 4.11.3 have an issue, where the (poorly named) dnsserver RPC pipe provides administrative facilities to modify DNS records and zones. Samba, when acting as an AD DC, stores DNS records in LDAP. In AD, the default permissions on the DNS partition allow creation of new records by authenticated users. This is used for example to allow machines to self-register in DNS. If a DNS record was created that case-insensitively matched the name of the zone, the ldb_qsort() and dns_name_compare() routines could be confused into reading memory prior to the list of DNS entries when responding to DnssrvEnumRecords() or DnssrvEnumRecords2() and so following invalid memory as a pointer.

Published

2019-12-10T23:15:10.360

Last Modified

2024-11-21T04:27:31.217

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 5.3 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:S/C:N/I:N/A:P

  • Access Vector: NETWORK
  • Access Complexity: MEDIUM
  • Authentication: SINGLE
  • Confidentiality Impact: NONE
  • Integrity Impact: NONE
  • Availability Impact: PARTIAL
Exploitability Score

6.8

Impact Score

2.9

Weaknesses
  • Type: Primary
    CWE-276
  • Type: Secondary
    CWE-276
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application samba samba < 4.9.17 Yes
Application samba samba < 4.10.11 Yes
Application samba samba < 4.11.3 Yes
Operating System fedoraproject fedora 30 Yes
Operating System fedoraproject fedora 31 Yes
Operating System canonical ubuntu_linux 14.04 Yes
Operating System canonical ubuntu_linux 16.04 Yes
Operating System canonical ubuntu_linux 18.04 Yes
Operating System canonical ubuntu_linux 19.04 Yes
Operating System canonical ubuntu_linux 19.10 Yes
Operating System opensuse leap 15.1 Yes
Operating System debian debian_linux 9.0 Yes
References