SB2016021501 - Multiple vulnerabilities in nginx 

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Main Vulnerability Database SB2016021501

SB2016021501 - Multiple vulnerabilities in nginx

Published: February 15, 2016 Updated: September 21, 2021

Security Bulletin ID SB2016021501
Severity
High
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 67% Medium 33%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 secuirty vulnerabilities.


1) NULL pointer dereference (CVE-ID: CVE-2016-0742)

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

The vulnerability exists due to a NULL pointer dereference error within resolver in nginx when processing UDP DNS packets. A remote attacker can send a specially crafted UDP DNS response to the application and perform a denial of service (DoS) attack.


2) Use-after-free (CVE-ID: CVE-2016-0746)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when processing a crafted DNS response related to CNAME response processing within the resolver in nginx. A remote attacker can send a specially crafted DNS response to the affected server, trigger a use-after-free error and perform a denial of service attack or execute arbitrary code on the system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.


3) Resource exhaustion (CVE-ID: CVE-2016-0747)

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

The vulnerability exists due to application does not properly limit the CNAME resolution within resolver component. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack by send a specially crafted DNS response.


Remediation

Install update from vendor's website.

References