SB2017082222 - Fedora 26 update for dnsdist

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Main Vulnerability Database SB2017082222

SB2017082222 - Fedora 26 update for dnsdist

Published: August 22, 2017 Updated: April 24, 2025

Security Bulletin ID SB2017082222
Severity
High
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 50% Medium 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Input validation error (CVE-ID: CVE-2016-7069)

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

The vulnerability exists in the way EDNS0 OPT records are handled when parsing responses from a backend. When dnsdist is configured to add EDNS Client Subnet to a query, the response may contain an EDNS0 OPT record that has to be removed before forwarding the response to the initial client.


2) Cross-site request forgery (CVE-ID: CVE-2017-7557)

The vulnerability allows a remote attacker to perform cross-site request forgery attacks.

The vulnerability exists due to insufficient validation of the HTTP request origin. A remote attacker can trick the victim to visit a specially crafted web page and perform arbitrary actions on behalf of the victim on the vulnerable website.


Remediation

Install update from vendor's website.

References