Gentoo Linux Security Advisory 201701-27 – Multiple vulnerabilities have been found in 7-Zip, the worst of which may allow execution of arbitrary code. Versions less than 16.02-r1 are affected.

FreeBSD Security Advisory – The ssh-agent(1) agent supports loading a PKCS#11 module from outside a trusted whitelist. An attacker can request loading of a PKCS#11 module across forwarded agent-socket. When privilege separation is disabled, forwarded Unix domain sockets would be created by sshd(8) with the privileges of ‘root’ instead of the authenticated user. A remote attacker who have control of a forwarded agent-socket on a remote system and have the ability to write files on the system running ssh-agent(1) agent can run arbitrary code under the same user credential. Because the attacker must already have some control on both systems, it is relatively hard to exploit this vulnerability in a practical attack. When privilege separation is disabled (on FreeBSD, privilege separation is enabled by default and has to be explicitly disabled), an authenticated attacker can potentially gain root privileges on systems running OpenSSH server.

Ubuntu Security Notice 3169-2 – USN-3169-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 16.04 LTS for Ubuntu 14.04 LTS. Dmitry Vyukov discovered that the KVM implementation in the Linux kernel did not properly initialize the Code Segment in certain error cases. A local attacker could use this to expose sensitive information. Various other issues were also addressed.

Ubuntu Security Notice 3169-4 – Baozeng Ding discovered a race condition that could lead to a use-after- free in the Advanced Linux Sound Architecture subsystem of the Linux kernel. A local attacker could use this to cause a denial of service. Andrey Konovalov discovered that signed integer overflows existed in the setsockopt system call when handling the SO_SNDBUFFORCE and SO_RCVBUFFORCE options. A local attacker with the CAP_NET_ADMIN capability could use this to cause a denial of service. Various other issues were also addressed.

Ubuntu Security Notice 3170-1 – Dmitry Vyukov discovered that the KVM implementation in the Linux kernel did not properly initialize the Code Segment in certain error cases. A local attacker could use this to expose sensitive information. Andrey Konovalov discovered that signed integer overflows existed in the setsockopt system call when handling the SO_SNDBUFFORCE and SO_RCVBUFFORCE options. A local attacker with the CAP_NET_ADMIN capability could use this to cause a denial of service. Various other issues were also addressed.

Ubuntu Security Notice 3170-2 – Andrey Konovalov discovered that the ipv6 icmp implementation in the Linux kernel did not properly check data structures on send. A remote attacker could use this to cause a denial of service. Andrey Konovalov discovered that signed integer overflows existed in the setsockopt system call when handling the SO_SNDBUFFORCE and SO_RCVBUFFORCE options. A local attacker with the CAP_NET_ADMIN capability could use this to cause a denial of service. Various other issues were also addressed.

Gentoo Linux Security Advisory 201701-19 – A vulnerability in NTFS-3G allows local users to gain root privileges. Versions less than 2016.2.22 are affected.