Kernel security update: CVE-2017-7472 and other; Virtuozzo ReadyKernel patch 19.1 for Virtuozzo 7.0.x


The cumulative Virtuozzo ReadyKernel patch updated with security fixes. The patch applies to Virtuozzo kernels 3.10.0-327.18.2.vz7.15.2 (Virtuozzo 7.0.0), 3.10.0-327.36.1.vz7.18.7 (Virtuozzo 7.0.1), and 3.10.0-327.36.1.vz7.20.18 (Virtuozzo 7.0.3). **Vulnerability id:** CVE-2017-7472 It was found that keyctl_set_reqkey_keyring() function leaked thread keyring which could allow an unprivileged local user to exhaust kernel memory. **Vulnerability id:** CVE-2017-6353 net/sctp/socket.c in the Linux kernel through 4.10.1 did not properly restrict association peel-off operations during certain wait states, which allowed local users to cause a denial of service (invalid unlock and double free) via a multithreaded application. **Vulnerability id:** CVE-2017-5986 Race condition in the sctp_wait_for_sndbuf function in net/sctp/socket.c in the Linux kernel before 4.9.11 could allow local users to cause a denial of service (assertion failure and panic) via a multithreaded application that peeled off an association in a certain buffer-full state. **Vulnerability id:** CVE-2016-9793 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 (system crash or memory corruption). **Vulnerability id:** PSBM-56705 A vulnerability was discovered in the handling of pid namespaces in the kernel. A privileged user inside a container could trigger a kernel crash (NULL pointer dereference in proc_flush_task()) using a sequence of system calls including wait4().

Affected Package

OS OS Version Package Name Package Version
Virtuozzo 7.0 readykernel-patch-15.2 19.1-1.vl7
Virtuozzo 7.0 readykernel-patch-18.7 19.1-1.vl7
Virtuozzo 7.0 readykernel-patch-20.18 19.1-1.vl7