HP has released a security bulletin and updated software to address the BIND RDATA query processing denial of service vulnerability.
A vulnerability in the ISC BIND could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on a targeted system.
The vulnerability is due to improper handling of certain queries by the affected software. An attacker could exploit this vulnerability by transmitting crafted queries to the affected system. An exploit could allow the attacker to cause a DoS condition on the system, denying service to legitimate users.
ISC has confirmed this vulnerability and released updated software.
The following ISC products are vulnerable:
BIND versions 9.7.0 through 9.7.7
BIND versions 9.8.0 through 9.8.6b1
BIND versions 9.9.0 through 9.9.4-S1b1
Depending on the network configuration, the attacker may need an access to trusted, internal networks to send the crafted queries to the affected server. This access requirement could limit the likelihood of a successful exploit.
ISC has indicated that both recursive and authoritative-only nameservers are affected.
ISC has confirmed all versions of BIND 9.7 are affected; however, these branches are beyond their end of life and do not receive testing or security fixes from the vendor.
ISC has released a security advisory at the following link: CVE-2013-4854
An unauthenticated, remote attacker could exploit this vulnerability to trigger an assertion failure. An exploit could result in a DoS condition, preventing the daemon from servicing future requests until the daemon can be restarted.
The vulnerability is due to an error while handling certain queries by the affected software.
An unauthenticated, remote attacker could exploit this vulnerability by sending a query containing crafted RDATA to an affected nameserver. Processing the query could cause the named service to terminate unexpectedly. If the exploit is successful, the attacker may be able to trigger an assertion failure that causes the service to terminate, resulting in a DoS condition.
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.
ISC BIND has released updates at the following links:
BIND 9.8.5-P2 BIND 9.9.3-P2
BIND 9.9.3-S1-P1 (Subscription version customers can obtain software update by contacting the vendor support channel)
CentOS packages can be updated using the up2date or yum command.
Red Hat has released updated software for registered subscribers at the following link: Red Hat Network
Red Hat packages can be updated on Red Hat Enterprise Linux versions 5 and later using the yum tool.
Version 3, July 30, 2013, 2:47 PM: Red Hat has released security advisories and updated packages to address BIND RDATA query processing denial of service vulnerability.
Version 2, July 30, 2013, 1:21 PM: CentOS has released updated packages to address BIND RDATA query processing denial of service vulnerability.
Version 1, July 29, 2013, 4:35 PM: ISC BIND contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service condition on a targeted system. Updates are available.
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