CVE-2019-14861

2019-12-1022:19:05

CWE-276

redhat

github.com

5.3 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

5.5 Medium

AI Score

Confidence

High

0.01 Low

EPSS

Percentile

83.8%

JSON

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.

CNA Affected

[
  {
    "vendor": "Red Hat",
    "product": "samba",
    "versions": [
      {
        "version": "all versions 4.11.x before 4.11.3",
        "status": "affected"
      },
      {
        "version": "all versions 4.10.x before 4.10.11",
        "status": "affected"
      },
      {
        "version": "all versions 4.x.x before 4.9.17",
        "status": "affected"
      }
    ]
  }
]