Nginx Web Server contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code. Updates are available.
A vulnerability in Nginx Web Server could allow an unauthenticated, remote attacker to execute arbitrary code.
The vulnerability is due to improper handling of crafted HTTP requests by a worker process used by the affected software. An unauthenticated, remote attacker could exploit this vulnerability by sending a crafted request to a targeted system. When processed, the request could allow the attacker to execute arbitrary code in the security context of the affected application.
Nginx.org has confirmed this vulnerability and released updated software.
Nginx Web Server versions 1.4.0 and prior are vulnerable.
To exploit the vulnerability, the attacker may need to transmit crafted HTTP requests to the targeted system, which may require access to trusted, internal networks. This access restriction could limit the likelihood of a successful exploit.
Nginx Web Server customers may also consider upgrading to software versions 1.4.1 or 1.5.0 because these versions are not affected by this vulnerability.
Nginx.org has released a security advisory at the following link: CVE-2013-2028
An unauthenticated, remote attacker could exploit this vulnerability to execute arbitrary code on a targeted system in the security context of the affected application. Successful exploitation may result in a complete system compromise.
The vulnerability is due to improper handling of crafted HTTP requests by a worker process used by the affected software. As a result, a stack-based buffer overflow condition could occur in the worker process.
An unauthenticated, remote attacker could exploit this vulnerability by sending a crafted HTTP request to a targeted system. When processed, the request could allow the attacker to execute arbitrary code in the security context of the affected application.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.
Administrators are advised to monitor affected systems.
The security vulnerability applies to the following combinations of products.
Nginx Web Server
1.3 .9 | 1.4 .0
6.3 Base | 6.4 Base | 7.0 Base | 7.1 Base | 7.2 Base | 7.3 Base | 7.4 Base | 8.0 Base | 8.1 Base | 8.2 Base | 8.3 Base | 9.0 Base | 9.1 Base
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