SB20191210101 - Fedora 30 update for samba

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Main Vulnerability Database SB20191210101

SB20191210101 - Fedora 30 update for samba

Published: December 10, 2019 Updated: April 25, 2025

Security Bulletin ID SB20191210101
Severity
Low
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Adjecent network
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Use of out-of-range pointer offset (CVE-ID: CVE-2019-14861)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to an error when processing DNS records in ldb_qsort() and dns_name_compare() function within the dnsserver RPC pipe. A remote authenticated user can register a zone with an existing name but in different register and force Samba to read memory prior to the list of DNS entries when responding to DnssrvEnumRecords() or DnssrvEnumRecords2() calls. This will trigger Samba to follow invalid memory as a pointer and lead to DoS of the DNS management server.


2) Improperly implemented security feature (CVE-ID: CVE-2019-14870)

The vulnerability allows a remote attacker to bypass certain security restrictions.

The vulnerability exists due to incorrect implementation of the DelegationNotAllowed Kerberos feature restriction ("delegation_not_allowed" user attribute) that is not applied when processing protocol transmission requests (S4U2Self) in the AD DC KDC. A remote authenticated user can gain access to sensitive information and functionality within the AD domain.


Remediation

Install update from vendor's website.

References