Two vulnerabilities in the popular BIND 9 DNS server jeopardise the server's stability and can cause the service to crash. One of the flaws can be exploited remotely via specially crafted UPDATE requests and affects both recursive and authoritative servers. The developers say that the nature of the defect makes it impossible to prevent potential attacks using Access Control Lists (ACLs).. The second defect is triggered by flawed request processing in servers that use "Response Policy Zones" (RPZs). Certain DNAME and CNAME records will cause BIND to crash. The intended use of the RPZ feature is to specify domain names that are not to be resolved. The domain names in question can, for instance, be established via a reputation database. RPZ is designed to counteract the thousands of spamming and malware domains that are registered every day. The link for this article located at H Security is no longer available. . Mitigating weaknesses in BIND DNS servers that threaten reliability and leave systems open to external assaults.. BIND DNS Server, Remote Exploit, Domain Name Security. . LinuxSecurity.com Team
Released last week, version 3.4.8 of the free Samba file and print server fixes various holes including two denial of service (DoS) vulnerabilities which allow attackers to remotely crash the Smbd service. One of the problems is caused by a null pointer dereference when processing a certain series of SMB headers that include a specific combination of flags. . The other hole involves an uninitialised variable read when processing specially crafted "Session Setup AndX" requests with flawed Security Binary Large Object (security blob) length values. Both flaws were already fixed in April In version 3.5.2. Users are advised to install one of the new versions as soon as possible because security firm Stratsec, which discovered the holes, released some relevant exploits.at the same time as the details of the vulnerability. The link for this article located at H Security is no longer available. . The release of Samba version 3.4.8 fixes critical Denial of Service vulnerabilities and rectifies a flaw related to an uninitialized variable. Prompt action to update is strongly recommended.. Samba Update, DoS Flaws, Samba Security Fix, Samba Software Patch, Denial of Service. . LinuxSecurity.com Team
Get the latest Linux and open source security news straight to your inbox.