kernel: dns_resolver upcall security issue

The DNS resolution functionality in the CIFS implementation in the Linux kernel before 2.6.35, when CONFIGCIFSDFSUPCALL is enabled, relies on a user's keyring for the dnsresolver upcall in the cifs.upcall userspace helper, which allows local users to spoof the results of DNS queries and perform...

PT-2010-4080 · Linux +1 · Linux Kernel +1

Name of the Vulnerable Software and Affected Versions: Linux kernel versions prior to 2.6.35 Description: The issue is related to the DNS resolution functionality in the CIFS implementation. It relies on a user's keyring for the dns resolver upcall in the cifs.upcall userspace helper, allowing...