Ubuntu Security Notice USN-2492-1

Ubuntu Security Notice 2492-1 – Andy Lutomirski discovered an information leak in the Linux kernel’s Thread Local Storage (TLS) implementation allowing users to bypass the espfix to obtain information that could be used to bypass the Address Space Layout Randomization (ASLR) protection mechanism. A local user could exploit this flaw to obtain potentially sensitive information from kernel memory. A flaw was discovered with file renaming in the linux kernel. A local user could exploit this flaw to cause a denial of service (deadlock and system hang). Various other issues were also addressed.

Ubuntu Security Notice USN-2490-1

Ubuntu Security Notice 2490-1 – Andy Lutomirski discovered an information leak in the Linux kernel’s Thread Local Storage (TLS) implementation allowing users to bypass the espfix to obtain information that could be used to bypass the Address Space Layout Randomization (ASLR) protection mechanism. A local user could exploit this flaw to obtain potentially sensitive information from kernel memory. Prasad J Pandit reported a flaw in the rock_continue function of the Linux kernel’s ISO 9660 CDROM file system. A local user could exploit this flaw to cause a denial of service (system crash or hang). Various other issues were also addressed.

Ubuntu Security Notice USN-2491-1

Ubuntu Security Notice 2491-1 – Andy Lutomirski discovered that the Linux kernel does not properly handle faults associated with the Stack Segment (SS) register in the x86 architecture. A local attacker could exploit this flaw to gain administrative privileges. Lars Bull reported a race condition in the PIT (programmable interrupt timer) emulation in the KVM (Kernel Virtual Machine) subsystem of the Linux kernel. A local guest user with access to PIT i/o ports could exploit this flaw to cause a denial of service (crash) on the host. Various other issues were also addressed.

Ubuntu Security Notice USN-2493-1

Ubuntu Security Notice 2493-1 – Andy Lutomirski discovered an information leak in the Linux kernel’s Thread Local Storage (TLS) implementation allowing users to bypass the espfix to obtain information that could be used to bypass the Address Space Layout Randomization (ASLR) protection mechanism. A local user could exploit this flaw to obtain potentially sensitive information from kernel memory. A flaw was discovered with file renaming in the linux kernel. A local user could exploit this flaw to cause a denial of service (deadlock and system hang). Various other issues were also addressed.

MIT krb5 Security Advisory 2015-001

MIT krb5 Security Advisory 2015-001 – The MIT krb5 team has discovered four vulnerabilities affecting kadmind. Some of these vulnerabilities may also affect server applications which use the gssrpc library or the gss_process_context_token() function. These are implementation vulnerabilities, not vulnerabilities in the Kerberos protocol.

CVE-2014-8013

The TACACS+ command-authorization implementation in Cisco NX-OS allows local users to cause a denial of service (device reload) via a long CLI command, aka Bug ID CSCur54182.