CVE number – CVE-2011-5327
A vulnerability in the Linux Kernel could allow an unauthenticated, remote attacker to execute arbitrary code or cause a denial of service (DoS) condition on a targeted system.
The vulnerability is due to an off-by-one error that could occur in the tcm_loop_make_naa_tpg()function, as defined in the drivers/target/loopback/tcm_loop.c source code file of the affected software. An attacker could exploit this vulnerability by sending a request that submits malicious input to the targeted system. A successful exploit could trigger an off-by-one error condition that causes memory corruption, which could allow the attacker to execute arbitrary code or cause a DoS condition.
Kernel.org has confirmed the vulnerability and released software updates.
- To exploit this vulnerability, an attacker must send a 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.
- Kernel.org has released a git commit at the following link: commit 12f09ccb4612734a53e47ed5302e0479c10a50f8
- Kernel.org has released software updates and a git commit at the following links: Kernel 3.1 or laterand loopback: off by one in tcm_loop_make_naa_tpg()
Duncan is a technology professional with over 20 years experience of working in various IT roles. He has a interest in cyber security, and has a wide range of other skills in radio, electronics and telecommunications.