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Debian DSA-3426-1 : Linux Security Update

Description

The remote Debian host is running a version of the Linux kernel prior to 3.2.73-2+deb7u1 on Debian 7 or is running a version of the Linux kernel prior to 3.16.7-ckt20-1+deb8u1 on Debian 8. It is, therefore, affected by the following vulnerabilities : - A use-after-free error exists in the unix_dgram_poll() function within file net/unix/af_unix.c. A local attacker can exploit this, via specially crafted epoll_ctl calls, to cause a denial of service condition or bypass AF_UNIX socket permissions. (CVE-2013-7446) - A NULL pointer dereference flaw exists in the slhc_init() function within file drivers/net/slip/slhc.c due to improper validation of slot numbers. A local attacker can exploit this, via specially crafted PPPIOCSMAXCID IOCTL calls, to cause a denial of service condition. (CVE-2015-7799) - A flaw exists in the usbvision driver that allows a local attacker, via a nonzero bInterfaceNumber value in a USB device descriptor, to cause a kernel panic, resulting in a denial of service condition. (CVE-2015-7833) - An infinite loop condition exists in the KVM subsystem on some unspecified CPU chipsets. A local attacker who has sufficient privileges within a virtual guest OS can exploit this issue, by triggering many debug exceptions, to cause a denial of service condition. (CVE-2015-8104) - A flaw exists in the truncate_space_check() function within file /fs/btrfs/inode.c due to improper handling of compressed file extents. A local attacker can exploit this, via a clone action, to disclose sensitive pre-truncation information from a file. (CVE-2015-8374) - A NULL pointer dereference flaw exists in the inet_autobind() function within file net/ipv4/af_inet.c when handling connection attempts via IPv6. A local attacker can exploit this, via a specially crafted SOCK_RAW application that makes use of CLONE_NEWUSER support, to cause a denial of service condition or possibly gain elevated privileges. (CVE-2015-8543)


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