CVE-2019-14861

Advisory lineage Upstream: 0 Downstream: 12
Modified
Published: 10 Dec 2019, 22:19
Last modified:05 Aug 2024, 00:26

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.3 MEDIUM
v3.0 (cve.org)
EPSS Score
5% LOW
5% probability +3.35%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

10 Dec 2019, 22:19
Published
Vulnerability first disclosed
05 Aug 2024, 00:26
Last Modified
Vulnerability information updated

Description

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.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.3CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
  • v3.0•MEDIUM•Score: 5.3CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
  • v2.0•LOW•Score: 3.5AV:N/AC:M/Au:S/C:N/I:N/A:P

EPSS Trends

Current EPSS score: 5.00%• Percentile: 90%

Techniques & Countermeasures

  • CWE-276•Incorrect Default Permissions

    During installation, installed file permissions are set to allow anyone to modify those files.

Affected Systems

  • canonical•ubuntu_linux

    14.04 | 16.04 | 18.04 | 19.04 | 19.10

  • debian•debian_linux

    9.0

  • fedoraproject•fedora

    30 | 31

  • opensuse•leap

    15.1

  • red hat•samba

    all versions 4.11.x before 4.11.3 | all versions 4.10.x before 4.10.11 | all versions 4.x.x before 4.9.17

  • samba•samba

    ≥ 4.0.0, < 4.9.17 | ≥ 4.10.0, < 4.10.11 | ≥ 4.11.0, < 4.11.3

References (12)