A vulnerability in the chunked transfer-encoding parser of Eclipse Jetty could allow an unauthenticated, remote attacker to conduct an HTTP request smuggling attack on a targeted system.
The vulnerability is due to an integer overflow condition in the transfer-encoding parser of the affected software and the improper handling of HTTP requests that contain invalid chunked transfer-encoding headers. An attacker could exploit this vulnerability by sending an HTTP request that submits malicious chunked transfer-encoding headers to the affected software, which could cause the software and an upstream HTTP agent to misinterpret the boundary of the request. A successful exploit could allow the attacker to poison the web cache on the system, which could be used to conduct further attacks.
Eclipse has confirmed the vulnerability and released software updates.
To exploit this vulnerability, the attacker must send an HTTP request that submits malicious input to the targeted system, making exploitation more difficult in environments that restrict network access from untrusted sources.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Administrators are advised to run both firewall and antivirus applications to minimize the potential of inbound and outbound threats.
Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.
Administrators can help protect affected systems from external attacks by using a solid firewall strategy.
Administrators are advised to monitor affected systems.
Eclipse has released a bug report at the following link: Bug 535668
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Cisco Multivendor Vulnerability Alerts respond to vulnerabilities identified in third-party vendors' products. These alerts contain information compiled from diverse sources and provide comprehensive technical descriptions, objective analytical assessments, workarounds and practical safeguards, and links to vendor advisories and patches.